lodash-es/internal/createBaseEach.js

The modern build of lodash exported as ES modules.

import getLength from './getLength';
import isLength from './isLength';
import toObject from './toObject';

/**
 * Creates a `baseEach` or `baseEachRight` function.
 *
 * @private
 * @param {Function} eachFunc The function to iterate over a collection.
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {Function} Returns the new base function.
 */
function createBaseEach(eachFunc, fromRight) {
  return function(collection, iteratee) {
    var length = collection ? getLength(collection) : 0;
    if (!isLength(length)) {
      return eachFunc(collection, iteratee);
    }
    var index = fromRight ? length : -1,
        iterable = toObject(collection);

    while ((fromRight ? index-- : ++index < length)) {
      if (iteratee(iterable[index], index, iterable) === false) {
        break;
      }
    }
    return collection;
  };
}

export default createBaseEach;