expression statement not assignment or call

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"Expression statement is not an assignment or call"

Not sure why this is happening, the import statement shows that the import is being used. Is there something wrong with the code above?

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Expression statement which is not assignment or call.

Reports an expression statement that is neither an assignment nor a call. Such statements usually indicate an error.

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Can be used to locate inspection in e.g. Qodana configuration files , where you can quickly enable or disable it, or adjust its settings.

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

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expression statement not assignment or call

why do i get warning "expected an assignment or function call and instead saw an expression?"

when i type code:

I get the message “expected an assignment…..” Why? Also if you miss out the semi-colon at the end the warning alerts you to this also, but there is inconsistency in the placement of the semi-colon eg the course only introduces it at the prompts - never mentioned up until then. know you get the javascript semi-colon insertion but feel ignoring it then suddenly expecting it as indicated via the warning is inconsistent and confusing.

Answer 505ae9c0e763ee000202ae85

These are assignments :

The stuff on the right-hand side of an assignment (everything after the = ) is called an expression . Usually expressions don’t stand alone. The warning is just there so you don’t accidentally forget the variable (the assignment’s left-hand side) that you would normally assign that expression’s value to.

A function call is something like console.log("hi!") and is also an expression , but a rather special one – it is frequently found on its own on a line.

Semicolons can be omitted in some cases, but generally it’s good to get used to put them wherever the yellow warning sign says that a semicolon is missing. You can omit them later when you have understood exactly under which circumstances they can be omitted. Also, if removing a semicolon does not produce a warning, then the semicolon probably doesn’t belong there – semicolons in the wrong places make nasty bugs that are hard to find.

Thanks for the precise answer. Now I understand it’s a warning as opposed to an error. I see what you mean too about semi-colons producing annoying bugs, but with this in mind then the course should start out by introducing the semi-colons in the correct places e.g., during the very first questions on getting length. The first exercises are on the command line so you don’t get warnings , so I think for consistency and accuracy the semi-colon should be introduced from the start.

I noticed this as well, I would love to see something raised at the start to clarify the when’s and when not’s of semi-colons.

wow, that’s incredibly confusing: I’m on the first few lessons, knowing nothing about javascript and I’m supposed to know how to declare a variable??? Assignments are not explained in the first lessons…

Nobody expects you to understand the technical terms behind the code editor’s warnings right away. Closely following the instructions is the only requirement for finishing the exercises.

Answer 512e95ea07c83f1a3f001f2c

I had to play around with it for a while, but this is what you have to do: ;”cake”.length*9

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(React) Expected an assignment or function call and instead saw an expression

Last updated: Apr 6, 2024 Reading time · 3 min

# (React) Expected an assignment or function call and instead saw an expression

The React.js error "Expected an assignment or function call and instead saw an expression" occurs when we forget to return a value from a function.

To solve the error, make sure to explicitly use a return statement or implicitly return using an arrow function.

react expected assignment or function call

Here are 2 examples of how the error occurs.

In the App component, the error is caused in the Array.map() method.

The issue is that we aren't returning anything from the callback function we passed to the map() method.

The issue in the mapStateToProps function is the same - we forgot to return a value from the function.

# Solve the error using an explicit return

To solve the error, we have to either use an explicit return statement or implicitly return a value using an arrow function.

Here is an example of how to solve the error using an explicit return .

We solved the issue in our map() method by explicitly returning. This is necessary because the Array.map() method returns an array containing all of the values that were returned from the callback function we passed to it.

# Solve the error using an implicit return

An alternative approach is to use an implicit return with an arrow function.

We used an implicit arrow function return for the App component.

If we are using an implicit return to return an object, we have to wrap the object in parentheses.

An easy way to think about it is - when you use curly braces without wrapping them in parentheses, you are declaring a block of code (like in an if statement).

When used without parentheses, you have a block of code, not an object.

If you believe that the Eslint rule shouldn't be showing an error, you can turn it off for a single line, by using a comment.

The comment should be placed right above the line where the error is caused.

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Disable Expression statement is not assignment or call on Javascript unit tests #198

luislobo Sep 28, 2023

It is not uncommon to use the following "non-normal" production code javascript expressions on unit tests.

.groups.should.be.an('array').that.is.not.empty;

How can I disable that check on all my unit tests folder?

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Replies: 1 comment

Brichbash oct 25, 2023 maintainer.

Hello,
You can exclude the inspection from your tests directory by adding to in your project root:

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SyntaxError: test for equality (==) mistyped as assignment (=)?

The JavaScript warning "test for equality (==) mistyped as assignment (=)?" occurs when there was an assignment ( = ) when you would normally expect a test for equality ( == ).

(Firefox only) SyntaxError warning which is reported only if javascript.options.strict preference is set to true .

What went wrong?

There was an assignment ( = ) when you would normally expect a test for equality ( == ). To help debugging, JavaScript (with strict warnings enabled) warns about this pattern.

Assignment within conditional expressions

It is advisable to not use simple assignments in a conditional expression (such as if...else ), because the assignment can be confused with equality when glancing over the code. For example, do not use the following code:

If you need to use an assignment in a conditional expression, a common practice is to put additional parentheses around the assignment. For example:

Otherwise, you probably meant to use a comparison operator (e.g. == or === ):

Equality operators

Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement

This error might look a little cryptic at first glance, but it's fairly descriptive in explaining what's wrong. You're likely to come across this one before your first cup of coffee.

This error might look a little cryptic at first, but what it's basically telling you is that what you typed isn't a valid C# statement. It probably looks really close though, because usually you just have a small typo.

First though, what's a statement ? Well, it's every valid line (or in some cases, block) of code that makes up your program, for example:

Assignments: string name = "my string";
Calls: MyOtherFunction();
Increments: x++;
Decrements: x--;
Await: await myLongTask;
New object expressions: new Person();

In general, most statements should either modify a variable's value in-place, perform some side-effect (like a foreach block), or at least do something with the return value.

So if you get this error, double-check the line it's complaining about to make sure it's a valid statement, specifically one of the types listed in the error message itself.

What should you check for?

Are you missing a set of parentheses? Console.WriteLine

Did you use == instead of = ? string name; name == Grant;

Did you combine elements of a property and method? public string Name() { get; set; }

Does your statement only return a value, but you're doing nothing with it? var hi = "Hello, "; hi + " Grant";

If none of those do it for you, feel free to leave a comment below. Heck, post the offending line, and we'll debug it together - maybe I'll have something else to add to this list.

Errors solved

Fix – assignment or function call and instead saw an expression no-unused-expressions in react.

By Pandu Rijal Pasa
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If you get an “ assignment or function call and instead saw an expression no-unused-expressions in React ” error, this article will help you to fix the issue.

The problem is mostly because you try to return a JSX element without a proper return syntax. This example can give you a similar error:

To fix this, you have to return a JSX element the right way. See some examples below:

Building a blogging platform Using React, GraphQL,…
How to build a CRUD application using MERN stack
Regular Expressions (RegExp) in JavaScript
Lazy Loading in React.js explained with Example
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How to implement linear search and binary search…

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Expected an assignment or function call and instead saw an expression

Reactjs guru.

February 10, 2024

The error message “ Expected an assignment or function call and instead saw an expression ” in React.js typically arises due to a missing return statement within a function, where a value is expected to be returned but isn’t.

Table of Contents

Understanding the Error:

The error message “Expected an Assignment or Function Call and Instead Saw an Expression” typically occurs in React.js when a function or callback does not return a value as expected. This can happen when we use methods like map() without properly returning a value from the callback function.

Causes of the Error:

Forgetting to use a return statement in a function or callback can lead to this error. This often occurs when we use array methods map() where a return value is expected from the callback function.

Solving the Error:

There are two main approaches to solving the “Expected an Assignment or Function Call and Instead Saw an Expression” error in React.js: using explicit and implicit returns.

1. Using Explicit Return:

Explicitly using a return statement ensures that functions or callbacks return the expected values. This is especially important when we use array methods like map() .

2. Using Implicit Return:

Using an implicit return with arrow functions provides a concise and elegant solution. This shorthand syntax is suitable for simple functional components and ensures that functions implicitly return values without using the return keyword.

Conclusion:

The “Expected an Assignment or Function Call and Instead Saw an Expression” error in React.js occurs when functions or callbacks fail to return values as expected, commonly due to incomplete definitions or incorrect usage of array methods. To fix this error, we can use explicit returns and implicit returns.

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Australian legend Jill McIntosh expresses concern about the Queensland Firebirds' coaching dramas

Two coaches turn towards each other and look concerned as they chat tactics

The Queensland Firebirds have officially begun searching for their next head coach after Bec Bulley and her assistant Lauren Brown both left the club within the space of five days.

Bulley and the Firebirds split last Thursday with five rounds left to go in the Super Netball season and just two years into her four-year contract.

Meanwhile, Brown lasted one match as caretaker before stepping down on Monday.

The July 1 closing date on the Firebirds job advertisement indicates a desire to move quickly, allowing candidates less than a fortnight to submit their expressions of interest.

Now, an Australian legend has weighed in and urged Netball Queensland to appoint a more "experienced head" as a failed pattern emerges in their recruitment strategy.

Before Bulley, it was Megan Anderson, who had a pretty similar backstory.

Each coach was a former Diamonds and Firebirds player, in their 40s, had yet to gain their high-performance accreditation and largely built their resume through assistant coaching roles.

Anderson departed in 2022 after two seasons and Bulley followed almost two years to the day under more controversial circumstances, as ties were cut midway through the season.

"One of the problems I'm seeing at the moment is there are a lot of inexperienced coaches being put into high-profile Super Netball positions when they're not quite ready," former Diamonds head coach Jill McIntosh said.

"I think it is a worry, they're being thrust into a demanding environment without having the grounding of leading a full program as a head coach at a reasonably high level.

"It is a tough, full-time commitment and some of these coaches just don't have the relevant experience, yet they're still being appointed and paired with an inexperienced assistant."

McIntosh chats to her players in a huddle

If there's anyone that understands the pressures of coaching, it's McIntosh.

After captaining her country and winning the 1983 Netball World Cup as a player, McIntosh went on to guide the Diamonds to two more World Cup victories and two Commonwealth Games gold medals from the sidelines.

Of the 94 Tests she coached for the Diamonds, McIntosh had a 94 per cent win rate and that meant once she'd finished up with Australia, her passport started to get a solid workout.

Over the years, McIntosh has moonlighted as a head coach for various teams overseas, including the likes of Jamaica, Northern Ireland, Singapore, Sri Lanka and Canada. If you include her work as a consultant in a less official capacity, that list of countries increases tenfold.

McIntosh has practically done it all and at 69, her biggest passion remains coaching education.

Players complete a wall sit as McIntosh stands and talks to them

Speaking with ABC Sport from Wales, where she has not long wrapped up the UK Superleague season with the Cardiff Dragons, McIntosh expressed concern over the state of coaching progression in Australia.

Netball Australia's high-performance accreditation course previously involved a trip to the AIS in Canberra for five days, where you were tested on your ability to perform under pressure.

Now, the course is run less frequently and when it does happen, McIntosh believes it has been watered down.

"Back when I was involved, it was really tough to get and not everyone that applied got in … You still had the standard two years to complete the process, but in my opinion, it was a tougher task and not everyone got it in their first go.

"I'm concerned these days that the current course has been watered down a bit.

"Now our coaches are coming out of it not fully prepared for all of the things they encounter at the top level and call me old-fashioned, but I also think we're doing it the wrong way around.

"You should have that accreditation first before being appointed in a Super Netball position and although we have to acknowledge that COVID has played a role to hold things up, I don't like the idea of putting yourself in a learning-on-the-job [situation]."

A coach can still be hired if they only have their elite coaching accreditation, which is one tier down, with the condition that they must complete the high-performance program within two years from the day they commence their role.

It is up to the league to support them to complete that final stage of the six-tier coaching progression.

This was the case for Anderson and Bulley.

But where that plan falls down, argues McIntosh, is when their assistant is also lacking experience — as some Super Netball assistants are still trying to obtain their elite accreditation.

"I had a bit to do with Bec when she was coming through and she was well on her way, but what she probably needed to succeed was either more time on the ground before taking on that role, or an experienced coach with her," McIntosh said.

"Someone that had been there, done that, so that they could be a sounding board and give advice.

"She needed more support and yes, Bec was an assistant at the NSW Swifts, but your head is not on the chopping block in that position.

"I know Bec was also a head coach in the NSW state league but it's just not the same level, with the same kinds of pressures, it really is an almighty step up to Super Netball.

"As a head coach, it all falls back on you … You're like the conductor of an orchestra."

McIntosh also rated maintaining relationships with the players as the toughest part of the gig.

And, as reported by ABC Sport, a breakdown between the coach and playing group was the main reason Bulley and the Firebirds went their separate ways.

"Dealing with elite players can be demanding and the higher up you go, the more it's about people management than anything else," McIntosh said.

"It's a tough gig to try and manage the egos and emotions … These players are up in the big time and so they all want to be on court and achieve, but the fact is they all can't be on court.

"If they don't get on, they certainly want to know why and if they don't like your feedback, they will challenge you … If they're not in the Diamonds, they want to be a Diamond.

"So, there's a lot that goes into that and for the coach to be able to mould a talented group of individuals into a winning team, it takes time to find out how to get the best out of them."

Firebirds players put their hands on their heads as they watch frustrated from the sidelines

So if assistant coaching isn't enough, the state league is still a mile off the top league and the academies don't play many games, how are you supposed to build the experience required to be a Super Netball head coach?

It seems like there is very limited opportunity for netball coaches in Australia and so we need to find a way to bridge that gap.

Super Netball Reserves is a brand-new concept that has been trialled as a pilot program this year, offering more experience to the players in academies and on the fringe of senior teams.

McIntosh hopes it will also offer a place for coaches to get runs on the board when it comes to player management and understanding what it can be like to travel week-in, week-out while experiencing the pressures of a proper high-performance environment.

This is important, because McIntosh says we need to be careful about pushing coaches too early, as a bad experience could potentially turn them away from the sport entirely.

Instead, she points out the many coaches on the older end of the scale with the right qualifications that are being cast aside because they don't have that "young" appeal.

"It seems to be the way now that you have to be a new-age coach to get a go, but there are plenty of experienced figures around Australia that I would love to see pop up," McIntosh said.

"Sometimes, when you get into your latter years of coaching, people think because you maybe haven't done it for a while, that you don't know what you're doing.

"You never lose it, and that experience counts for a lot."

McIntosh confirmed she won't be applying for the Firebirds role, but that there would still be plenty of well-versed coaches out there that would be keen and are also based in Queensland.

There are roughly 30 active Australian coaches with high-performance accreditation and the majority of those are thought to be from the Sunshine State.

"When it comes to the Firebirds, I would hope now that they go for someone like that, even if it was only one year for the 2025 season to get everything back on track … And they should look within their state first, because it's been a while since they've had a Queenslander in charge.

"Sure, there will be some coaches reading that job advertisement and saying to themselves, why would I want to go into that environment?

"But I'm also confident there'll be others who say, 'Well, give me the challenge'."

The ABC of SPORT

X (formerly Twitter)

'It's unprecedented': Two big names depart Super Netball on same night, sending fan speculation into overdrive

Bec Bulley has her hands in her pockets and looks glum, Sam Wallace-Joseph holds the ball with one hand and waves the other

National Netball League

Introducing Apple Intelligence, the personal intelligence system that puts powerful generative models at the core of iPhone, iPad, and Mac

MacBook Pro, iPad Pro, and iPhone 15 Pro show new Apple Intelligence features.

New Capabilities for Understanding and Creating Language

A user opens the Writing Tools menu while working on an email, and is given the option to select Proofread or Rewrite.

Image Playground Makes Communication and Self‑Expression Even More Fun

The new Image Playground app is shown on iPad Pro.

Genmoji Creation to Fit Any Moment

A user creates a Genmoji of a person named Vee, designed to look like a race car driver.

New Features in Photos Give Users More Control

Three iPhone 15 Pro screens show how users can create Memory Movies.

Siri Enters a New Era

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ChatGPT Gets Integrated Across Apple Platforms

An iPhone 15 Pro user enters a prompt for Siri that reads, “I have fresh salmon, lemons, tomatoes. Help me plan a 5-course meal with a dish for each taste bud.”

Text of this article

June 10, 2024

PRESS RELEASE

Setting a new standard for privacy in AI, Apple Intelligence understands personal context to deliver intelligence that is helpful and relevant

CUPERTINO, CALIFORNIA Apple today introduced Apple Intelligence , the personal intelligence system for iPhone, iPad, and Mac that combines the power of generative models with personal context to deliver intelligence that’s incredibly useful and relevant. Apple Intelligence is deeply integrated into iOS 18, iPadOS 18, and macOS Sequoia. It harnesses the power of Apple silicon to understand and create language and images, take action across apps, and draw from personal context to simplify and accelerate everyday tasks. With Private Cloud Compute, Apple sets a new standard for privacy in AI, with the ability to flex and scale computational capacity between on-device processing and larger, server-based models that run on dedicated Apple silicon servers.

“We’re thrilled to introduce a new chapter in Apple innovation. Apple Intelligence will transform what users can do with our products — and what our products can do for our users,” said Tim Cook, Apple’s CEO. “Our unique approach combines generative AI with a user’s personal context to deliver truly helpful intelligence. And it can access that information in a completely private and secure way to help users do the things that matter most to them. This is AI as only Apple can deliver it, and we can’t wait for users to experience what it can do.”

Apple Intelligence unlocks new ways for users to enhance their writing and communicate more effectively. With brand-new systemwide Writing Tools built into iOS 18, iPadOS 18, and macOS Sequoia, users can rewrite, proofread, and summarize text nearly everywhere they write, including Mail, Notes, Pages, and third-party apps.

Whether tidying up class notes, ensuring a blog post reads just right, or making sure an email is perfectly crafted, Writing Tools help users feel more confident in their writing. With Rewrite, Apple Intelligence allows users to choose from different versions of what they have written, adjusting the tone to suit the audience and task at hand. From finessing a cover letter, to adding humor and creativity to a party invitation, Rewrite helps deliver the right words to meet the occasion. Proofread checks grammar, word choice, and sentence structure while also suggesting edits — along with explanations of the edits — that users can review or quickly accept. With Summarize, users can select text and have it recapped in the form of a digestible paragraph, bulleted key points, a table, or a list.

In Mail, staying on top of emails has never been easier. With Priority Messages, a new section at the top of the inbox shows the most urgent emails, like a same-day dinner invitation or boarding pass. Across a user’s inbox, instead of previewing the first few lines of each email, they can see summaries without needing to open a message. For long threads, users can view pertinent details with just a tap. Smart Reply provides suggestions for a quick response, and will identify questions in an email to ensure everything is answered.

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In the Notes and Phone apps, users can now record, transcribe, and summarize audio. When a recording is initiated while on a call, participants are automatically notified, and once the call ends, Apple Intelligence generates a summary to help recall key points.

Apple Intelligence powers exciting image creation capabilities to help users communicate and express themselves in new ways. With Image Playground, users can create fun images in seconds, choosing from three styles: Animation, Illustration, or Sketch. Image Playground is easy to use and built right into apps including Messages. It’s also available in a dedicated app, perfect for experimenting with different concepts and styles. All images are created on device, giving users the freedom to experiment with as many images as they want.

With Image Playground, users can choose from a range of concepts from categories like themes, costumes, accessories, and places; type a description to define an image; choose someone from their personal photo library to include in their image; and pick their favorite style.

With the Image Playground experience in Messages, users can quickly create fun images for their friends, and even see personalized suggested concepts related to their conversations. For example, if a user is messaging a group about going hiking, they’ll see suggested concepts related to their friends, their destination, and their activity, making image creation even faster and more relevant.

In Notes, users can access Image Playground through the new Image Wand in the Apple Pencil tool palette, making notes more visually engaging. Rough sketches can be turned into delightful images, and users can even select empty space to create an image using context from the surrounding area. Image Playground is also available in apps like Keynote, Freeform, and Pages, as well as in third-party apps that adopt the new Image Playground API.

Taking emoji to an entirely new level, users can create an original Genmoji to express themselves. By simply typing a description, their Genmoji appears, along with additional options. Users can even create Genmoji of friends and family based on their photos. Just like emoji, Genmoji can be added inline to messages, or shared as a sticker or reaction in a Tapback.

Searching for photos and videos becomes even more convenient with Apple Intelligence. Natural language can be used to search for specific photos, such as “Maya skateboarding in a tie-dye shirt,” or “Katie with stickers on her face.” Search in videos also becomes more powerful with the ability to find specific moments in clips so users can go right to the relevant segment. Additionally, the new Clean Up tool can identify and remove distracting objects in the background of a photo — without accidentally altering the subject.

With Memories, users can create the story they want to see by simply typing a description. Using language and image understanding, Apple Intelligence will pick out the best photos and videos based on the description, craft a storyline with chapters based on themes identified from the photos, and arrange them into a movie with its own narrative arc. Users will even get song suggestions to match their memory from Apple Music. As with all Apple Intelligence features, user photos and videos are kept private on device and are not shared with Apple or anyone else.

Powered by Apple Intelligence, Siri becomes more deeply integrated into the system experience. With richer language-understanding capabilities, Siri is more natural, more contextually relevant, and more personal, with the ability to simplify and accelerate everyday tasks. It can follow along if users stumble over words and maintain context from one request to the next. Additionally, users can type to Siri, and switch between text and voice to communicate with Siri in whatever way feels right for the moment. Siri also has a brand-new design with an elegant glowing light that wraps around the edge of the screen when Siri is active.

Siri can now give users device support everywhere they go, and answer thousands of questions about how to do something on iPhone, iPad, and Mac. Users can learn everything from how to schedule an email in the Mail app, to how to switch from Light to Dark Mode.

With onscreen awareness, Siri will be able to understand and take action with users’ content in more apps over time. For example, if a friend texts a user their new address in Messages, the receiver can say, “Add this address to his contact card.”

With Apple Intelligence, Siri will be able to take hundreds of new actions in and across Apple and third-party apps. For example, a user could say, “Bring up that article about cicadas from my Reading List,” or “Send the photos from the barbecue on Saturday to Malia,” and Siri will take care of it.

Siri will be able to deliver intelligence that’s tailored to the user and their on-device information. For example, a user can say, “Play that podcast that Jamie recommended,” and Siri will locate and play the episode, without the user having to remember whether it was mentioned in a text or an email. Or they could ask, “When is Mom’s flight landing?” and Siri will find the flight details and cross-reference them with real-time flight tracking to give an arrival time.

To be truly helpful, Apple Intelligence relies on understanding deep personal context while also protecting user privacy. A cornerstone of Apple Intelligence is on-device processing, and many of the models that power it run entirely on device. To run more complex requests that require more processing power, Private Cloud Compute extends the privacy and security of Apple devices into the cloud to unlock even more intelligence.

With Private Cloud Compute, Apple Intelligence can flex and scale its computational capacity and draw on larger, server-based models for more complex requests. These models run on servers powered by Apple silicon, providing a foundation that allows Apple to ensure that data is never retained or exposed.

Independent experts can inspect the code that runs on Apple silicon servers to verify privacy, and Private Cloud Compute cryptographically ensures that iPhone, iPad, and Mac do not talk to a server unless its software has been publicly logged for inspection. Apple Intelligence with Private Cloud Compute sets a new standard for privacy in AI, unlocking intelligence users can trust.

Apple is integrating ChatGPT access into experiences within iOS 18, iPadOS 18, and macOS Sequoia, allowing users to access its expertise — as well as its image- and document-understanding capabilities — without needing to jump between tools.

Siri can tap into ChatGPT’s expertise when helpful. Users are asked before any questions are sent to ChatGPT, along with any documents or photos, and Siri then presents the answer directly.

Additionally, ChatGPT will be available in Apple’s systemwide Writing Tools, which help users generate content for anything they are writing about. With Compose, users can also access ChatGPT image tools to generate images in a wide variety of styles to complement what they are writing.

Privacy protections are built in for users who access ChatGPT — their IP addresses are obscured, and OpenAI won’t store requests. ChatGPT’s data-use policies apply for users who choose to connect their account.

ChatGPT will come to iOS 18, iPadOS 18, and macOS Sequoia later this year, powered by GPT-4o. Users can access it for free without creating an account, and ChatGPT subscribers can connect their accounts and access paid features right from these experiences.

Availability

Apple Intelligence is free for users, and will be available in beta as part of iOS 18 , iPadOS 18 , and macOS Sequoia this fall in U.S. English. Some features, software platforms, and additional languages will come over the course of the next year. Apple Intelligence will be available on iPhone 15 Pro, iPhone 15 Pro Max, and iPad and Mac with M1 and later, with Siri and device language set to U.S. English. For more information, visit apple.com/apple-intelligence .

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Unused expression, expected an assignment or function call (Angular)

I'm making a registration form in Angular. I want to check if I have User's username and pass that value to the object if it is not null.

I am getting this error: Unused expression, expected an assignment or function call (no-unused-expression)

What's with the mania for saving literally two characters by avoiding an if statement? Only in this case you don't save anything because you need && and () which is the same length as if and () . – VLAZ Commented Nov 25, 2020 at 20:30

2 Answers 2

It's telling you to not abuse && as a replacement for if . Instead, use:

Or, consider:

Is there a way to use it without if? – urosmladenovic Commented Nov 25, 2020 at 20:30
@urosmladenovic why? You don't have a single expression there, so what is the reason to avoid the statement? – VLAZ Commented Nov 25, 2020 at 20:31
It's possible, but it's a bad idea, because avoiding if obscures the intent of the code and makes it harder to read. That's why the linting rule exists. If you want to save characters from being sent in the .js to the client, leave that to automatic minifiers, while keeping the source code as readable as possible. – CertainPerformance Commented Nov 25, 2020 at 20:31

That's a common tslint rule that requires you to not leave an expression (that is, a statement that produces a result) unused.

You can use an if statement like this:

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Expression statement is not assignment or call warning in Javascript
3. In order to disable this WebStorm-specific code inspection go to. WebStorm -> Preferences -> Editor -> Inspections. and uncheck the box under JavaScript -> JavaScript validity issues. that has the label, "expression statement which is not assignment or call". If you would like to actually change your code to fix these errors, see .
WebStorm error: expression statement is not assignment or call
The problem is that WebStorm will show a warning if that statement isn't doing any of the following within a function: Calling another function. Making any sort of assignment. Returning a value. (There may be more, but those are the ones I know of) In other words, WebStorm views that function as unnecessary and tries to help you catch unused code.
Code Inspection: Expression statement which is not assignment or call
Code Inspection: Expression statement which is not assignment or call. Reports an expression statement that is neither an assignment nor a call.
"Expression statement is not an assignment or call"
is going to result in you changing the value of firstNameValidationWarnings to a number; the return value of push is, annoyingly, the new length of the array. Try: firstNameValidationWarnings : this.state.firstNameValidationWarnings.concat(["First Name must contain only characters"]) as this will return an array.
Expression statement
Apart from the dedicated statement syntaxes, you can also use almost any expression as a statement on its own. The expression statement syntax requires a semicolon at the end, but the automatic semicolon insertion process may insert one for you if the lack of a semicolon results in invalid syntax.. Because the expression is evaluated and then discarded, the result of the expression is not ...
Expression statement which is not assignment or call
Last modified: 29 April 2024. Attempt to assign to const or readonly variable Function with inconsistent returns Function with inconsistent returns
WebStorm error: expression statement is not assignment or call
In some scenarios, you might need to restart your IDE for the changes to reflect properly. Method 2. The problem is that WebStorm will show a warning if that statement isn't doing any of the following within a function:. Calling another function
Fix expected an assignment or function call and instead saw an expression
If you are getting expected an assignment or function call and instead saw an expression error, Here is a simplified version that gives. Blog ; ... Unexpected assignment expression. ... Jshint/Jslint do not like misuse of shortcut evaluation of logical operator as a replacement for if statements. It assumes that if the result of an expression ...
why do i get warning "expected an assignment or function call and
The warning is just there so you don't accidentally forget the variable (the assignment's left-hand side) that you would normally assign that expression's value to. A function call is something like console.log("hi!") and is also an expression, but a rather special one - it is frequently found on its own on a line.
(React) Expected an assignment or function call and instead saw an
The code for this article is available on GitHub. We solved the issue in our map() method by explicitly returning. This is necessary because the Array.map () method returns an array containing all of the values that were returned from the callback function we passed to it. Note that when you return from a nested function, you aren't also ...
Disable `Expression statement is not assignment or call` on Javascript
Disable `Expression statement is not assignment or call` on Javascript unit tests It is not uncommon to use the following "non-normal" production code javascript expressions on unit tests. foundDashboard.groups.should.be.an('array').that.is.not.empty; How can I...
SyntaxError: test for equality (==) mistyped as assignment
It is advisable to not use simple assignments in a conditional expression (such as if...else), because the assignment can be confused with equality when glancing over the code.For example, do not use the following code:
Erroneous "Expression statement is not assignment or call" : WEB-66868
Erroneous "Expression statement is not assignment or call". This is intermittent and I think started happening with the latest update to IDEA, so maybe a regression bug. Several times a day while editing TSX source files I see the weak warning "Expression statement is not assignment or call". If I cut the code and paste it back in, without any ...
Only assignment, call, increment, decrement, await, and new object
Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement. Grant. Nov 14, 2019. Update: Mar 25, 2023 ... In general, most statements should either modify a variable's value in-place, perform some side-effect (like a foreach block), ...
Fix
22 Feb. If you get an " assignment or function call and instead saw an expression no-unused-expressions in React " error, this article will help you to fix the issue. The problem is mostly because you try to return a JSX element without a proper return syntax. This example can give you a similar error: To fix this, you have to return a JSX ...
Expected an assignment or function call and instead saw an expression
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PhpStorm/JavaScript Expression statement is not assignment or call
2. If you want to return this value, you have to add the expression "return" or if you want to print the Range[this.timeRange]; you should add the "print" expression. Alternatively you can just take this line out, because as the comment above i dont really see the purpose of this line. answered Aug 30, 2022 at 10:18. m0shpe.
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Error CS0201; Only assignment, call, increment, decrement, await, and
Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers.
Unused expression, expected an assignment or function call (Angular)
I'm making a registration form in Angular. I want to check if I have User's username and pass that value to the object if it is not null. loadData(data: User) { data.username && (this.registrationData.username = data.username.trim()); } I am getting this error: Unused expression, expected an assignment or function call (no-unused-expression)

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Disable Expression statement is not assignment or call on Javascript unit tests #198

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SyntaxError: test for equality (==) mistyped as assignment (=)?

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Assignment within conditional expressions

Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement

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Expected an assignment or function call and instead saw an expression

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2. Using Implicit Return:

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