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sebmck's profile
Sebastian
Sebastian
Sebastian
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@sebmck

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SebastianVerified account

@sebmck

JavaScript boy and “lovely thoughtleader” ⌨️ he/him ♂️

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Joined April 2011

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    1. Michael Jackson‏ @mjackson 1 Feb 2016
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      #JavaScript promises are only half a solution. async/await is the other half. One isn't terribly useful without the other.

      7 replies 4 retweets 28 likes
    2. Jordan Harband‏ @ljharb 2 Feb 2016
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      Replying to @mjackson

      Jordan Harband Retweeted Jordan Harband

      @mjackson i don’t understand this opinion - async/await is just sugarhttps://twitter.com/ljharb/status/663855406687490048 …

      Jordan Harband added,

      Jordan Harband @ljharb
      ES7 protip: `async function` is syntax sugar for a Promise-returning function; `await` is syntax sugar for nested Promise `then`s.
      1 reply 0 retweets 1 like
    3. Michael Jackson‏ @mjackson 2 Feb 2016
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      Replying to @ljharb

      @ljharb async/await make promises useful. w/out them I write code that is unmanageable and swallows errors.

      1 reply 0 retweets 0 likes
    4. Jordan Harband‏ @ljharb 2 Feb 2016
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      Replying to @mjackson

      @mjackson async/await has identical swallowing behavior to normal Promises - an async function returns a Promise that you need to `.catch`.

      1 reply 0 retweets 0 likes
    5. Michael Jackson‏ @mjackson 2 Feb 2016
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      Replying to @ljharb

      @ljharb i would never call an async function without await, which would throw the error.

      1 reply 0 retweets 0 likes
    6. Jordan Harband‏ @ljharb 2 Feb 2016
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      Replying to @mjackson

      @mjackson `await` only works *inside* async functions, and a thrown error in an async function rejects the outer Promise.

      1 reply 0 retweets 1 like
    7. Michael Jackson‏ @mjackson 3 Feb 2016
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      Replying to @ljharb

      @ljharb Ah, I see what you're saying. At the top level you're always going to have a Promise.

      1 reply 0 retweets 0 likes
    8. Jordan Harband‏ @ljharb 3 Feb 2016
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      Replying to @mjackson

      @mjackson exactly - you can’t avoid the (simple) rule of “always add .catch to a promise”

      1 reply 0 retweets 0 likes
    9. Michael Jackson‏ @mjackson 3 Feb 2016
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      Replying to @ljharb

      @ljharb the only time I ever want to use the Promise API is at the very top level. Otherwise it's async/await all the way down.

      1 reply 0 retweets 0 likes
    10. Jordan Harband‏ @ljharb 3 Feb 2016
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      Replying to @mjackson

      @mjackson that’s fine if all your async operations are serial and dependent on each other. if any are parallel, using await will be subpar.

      3 replies 0 retweets 1 like
      Sebastian‏Verified account @sebmck 3 Feb 2016
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      Replying to @ljharb

      @ljharb @mjackson Promise.all?

      10:25 AM - 3 Feb 2016
      • 1 Like
      • Brian Holt
      1 reply 0 retweets 1 like
        1. Eric Ferraiuolo‏ @ericf 3 Feb 2016
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          Replying to @sebmck

          @sebmck @ljharb @mjackson yeah! let [res1, res2] = await Promise.all([fetch(req1), fetch(req2)]);

          0 replies 1 retweet 0 likes
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