javascript for loop 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: for of loop syntax javascript
for (let step = 0; step < 5; step++) {
console.log('Walking east one step');
}
Example 3: js get index from foreach
var myArray = [123, 15, 187, 32];
myArray.forEach(function (value, i) {
console.log('%d: %s', i, value);
});
Example 4: javascript for loop return index
const targetindex = myarray.findIndex(item => item.name === 'xyz');