javascript for with index code example
Example 1: javascript enumerate with index
const iterable = [...];
for (const [index, elem] in iterable.entries()) {
f(index, elem);
}
iterable.forEach((elem, index) => {
f(index, elem);
});
Example 2: js get index from foreach
var myArray = [123, 15, 187, 32];
myArray.forEach(function (value, i) {
console.log('%d: %s', i, value);
});
Example 3: javascript for of index
let array = ["foo", "bar"]
let low = 0;
let high = array.length;
for(let i = low; i < high; i++) {
console.log(i);
console.log(array[i]);
}
Example 4: javascript for loop return index
const targetindex = myarray.findIndex(item => item.name === 'xyz');