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No Promises - Various - Addicted / No Promises / Blob


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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The Promise. Which basically means that set promises resolve after and if all promises in argument list have been resolved.

I tried to implement it. I made simply promise ajax call. How does it work? I think it's easier to understand if we implement No Promises - Various - Addicted / No Promises / Blob and understand why we need it. A common use case might be to wait for the window to load and for the server to return data in order to run some code:.

Now, we want both of them to execute at the same time and then get the result. There are two items here but there could have easily been 5 Un Corazón Herido - Yuri - Yuri to wait for, or So we use Promise.

Your get function returns a Promise. You are just passing a reference to the get function. You have to pass an array of Promises.

Array of promises as an argument and returns a single promise when all the promises in the iterable argument have been resolved or when iterable argument contains no promises. It resolves with an array of the resolved values and rejects with a single value of the first rejected Promise. In the above example 3 Promises are passed into the Promise.

Promise 1 and 3 always resolve. Promise 2 either No Promises - Various - Addicted / No Promises / Blob or rejects based on the random Nr generator. This Promise. Then the then method and the catch method can be called on this promise which is returned from Promise. The then method gets an array of all the resolved values, [5, 1, 'foo'] in this case. The catch method gets the value of the first rejected Promise, 1 in this example. This method is very usefull when you want to execute multiple async operations and need to something with the results after the async operations.

When using Promise. For example, when we need to get information using multiple AJAX requests and combine the data to something useful.

It is essential to wait for all the data to be available otherwise we would try to combine non existing data which would lead to problems. Here we provide multiple Promises as argument.

It rejects when first promise argument reject. Learn more. How does promise. Ask Question. Asked 4 years, 5 months ago. Active 10 months ago. Viewed 5k times. I started diggin' in promises and found interesting Promise. But after I tried to add Promise. Darlyn No Promises - Various - Addicted / No Promises / Blob 3, 8 8 gold badges 25 25 silver badges 53 53 bronze badges. Benjamin Gruenbaum Benjamin Gruenbaum k 69 69 gold badges silver badges bronze badges.

Interessting explanationthanks!. But im not sure if i got few things. Which mean argument in then callback would be returned pbut what if we passed promise there?

Thanks for answer! You have to pass an FBI - Bootleg From The Dayton Family - The Product of Promises Promise. Juan Mendes Juan Mendes TLDR: Promise. Willem van der Veen Willem van der Veen 10k 4 4 gold badges 64 64 silver badges 62 62 bronze badges. Lovekush Lovekush 1. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

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7 comments on this post


    That returns a new promise object (which begins life already in the resolved state), but you're not doing anything with the return value, so this has no effect at all. You're never resolving the promises f0 through f4 created in ajaxSubmit() which is why the then() never fires. Your processCanvas() should return a .


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