iter-tools-es/impls/$enumerate/enumerate.js

The iterable toolbox

const {
  iterableCurry
} = require('../../internal/iterable.js');

const {
  __map
} = require('../$map/map.js');

function __enumerate(source, start = 0) {
  return __map(source, (value, i) => [start + i, value]);
}

exports.__enumerate = __enumerate;
const enumerate = /*#__PURE__*/iterableCurry(__enumerate, {
  minArgs: 0,
  maxArgs: 1
});
exports.enumerate = enumerate;