javascript for...of index
for (const [i, v] of ['a', 'b', 'c'].entries()) {
console.log(i, v)
}javascript for...of index
for (const [i, v] of ['a', 'b', 'c'].entries()) {
console.log(i, v)
}for of and for in javascript
let arr = ['el1', 'el2', 'el3'];
arr.addedProp = 'arrProp';
// elKey are the property keys
for (let elKey in arr) {
console.log(elKey);
}
// elValue are the property values
for (let elValue of arr) {
console.log(elValue)
}for of example
const cars = ["BMW", "Volvo", "Mini"];
let text = "";
for (let x of cars) {
text += x + " ";
}mdn for..of
function* fibonacci() { // a generator function
let [prev, curr] = [0, 1];
while (true) {
[prev, curr] = [curr, prev + curr];
yield curr;
}
}
for (const n of fibonacci()) {
console.log(n);
// truncate the sequence at 1000
if (n >= 1000) {
break;
}
}use these instead of a for loop javascript
const array = [1,2,3,4,5];const evenNumbers = array.filter(function(elem) { // expressions that return 'true' are retained return elem % 2 == 0;});Copyright © 2021 Codeinu
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