for of get index
for (const v of ['a', 'b', 'c']) {
console.log(v)
}
// get index
for (const [i, v] of ['a', 'b', 'c'].entries()) {
console.log(i, v)
}for of get index
for (const v of ['a', 'b', 'c']) {
console.log(v)
}
// get index
for (const [i, v] of ['a', 'b', 'c'].entries()) {
console.log(i, v)
}javascript enumerate with index
const iterable = [...];
for (const [index, elem] in iterable.entries()) {
f(index, elem);
}
// or
iterable.forEach((elem, index) => {
f(index, elem);
});javascript for loop 5 times
for (let step = 0; step < 5; step++) {
// Runs 5 times, with values of step 0 through 4.
console.log('Walking east one step');
}js get index from foreach
var myArray = [123, 15, 187, 32];
myArray.forEach(function (value, i) {
console.log('%d: %s', i, value);
});
// Outputs:
// 0: 123
// 1: 15
// 2: 187
// 3: 32javascript for loop return index
const targetindex = myarray.findIndex(item => item.name === 'xyz');Copyright © 2021 Codeinu
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