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Leo Horie 2016-11-23 01:49:06 -05:00
parent e4ba0318d6
commit 42e13c1559
2 changed files with 15 additions and 8 deletions
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14
docs/promise.md
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@ -191,9 +191,9 @@ In the refactored version, it's trivial to test whether `getFirstTen` has any of
Promises absorb other promises. Basically, this means you can never receive a Promise as an argument to `onFulfilled` or `onRejected` callbacks for `then` and `catch` methods. This feature allows us to flatten nested promises to make code more manageable.
```Javascript
```javascript
function searchUsers(q) {return m.request("/api/v1/users/search", {data: {q: q}})}
function getUserProjects() {return m.request("/api/v1/user/" + id + "/projects")}
function getUserProjects(id) {return m.request("/api/v1/users/" + id + "/projects")}
// AVOID: pyramid of doom
searchUsers("John").then(function(users) {
@ -230,7 +230,7 @@ searchUsers("John")
.then(getProjectTitles)
.then(alert)
.catch(function(e) {
console.error(e)
console.log(e)
})
```
@ -275,10 +275,10 @@ Promise.all([
// data[0] is an array of users whose names are John
// data[1] is an array of users whose names are Mary
//the returned value is equivalent to [
// getUserNames(data[0]),
// getUserNames(data[1]),
//]
// the returned value is equivalent to [
// getUserNames(data[0]),
// getUserNames(data[1]),
// ]
return data.map(getUserNames)
})
.then(alert)