js map async
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;
}));js map async
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;
}));async map js
const arr = [1, 2, 3];
const asyncRes = await Promise.all(arr.map(async (i) => {
await sleep(10);
return i + 1;
}));
console.log(asyncRes);
// 2,3,4async array map
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)
})async map js
const arr = [1, 2, 3];
const syncRes = arr.map((i) => {
return i + 1;
});
console.log(syncRes);
// 2,3,4js is map async
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
*/Copyright © 2021 Codeinu
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