js map async
const mapLoop = async _ => {
console.log('Start')
const promises = fruitsToGet.map(async fruit => {
const numFruit = await getNumFruit(fruit)
return numFruit
})
const numFruits = await Promise.all(promises)
console.log(numFruits)
console.log('End')
}
4
9
Arr = await Promise.all(arr)
Thank you!
9
0
4.3
10
const list = [1, 2, 3, 4, 5] //...an array filled with values
const functionThatReturnsAPromise = item => { //a function that returns a promise
return Promise.resolve('ok')
}
const doSomethingAsync = async item => {
return functionThatReturnsAPromise(item)
}
const getData = async () => {
return Promise.all(list.map(item => doSomethingAsync(item)))
}
getData().then(data => {
console.log(data)
})
Thank you!
10
0
4
7
const list = [1, 2, 3, 4, 5] //...an array filled with values
const functionWithPromise = item => { //a function that returns a promise
return Promise.resolve('ok')
}
const anAsyncFunction = async item => {
return functionWithPromise(item)
}
const getData = async () => {
return Promise.all(list.map(item => anAsyncFunction(item)))
}
getData().then(data => {
console.log(data)
})
Thank you!
7
0
4.1
10
var arr = [1, 2, 3, 4, 5];
var results: number[] = await Promise.all(arr.map(async (item): Promise<number> => {
await callAsynchronousOperation(item);
return item + 1;
}));
Thank you!
10
0
3.43
7
let obj = {
one: 1,
two: 2,
three: 3
}
obj.map((element, index) => {
// do something
// return result
});
/*
map() is a higher order function (a function that takes another
function as a parameter) and as such is synchronous
*/
Thank you!
7
0
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