lodash/collection/every.js

define(['../internal/arrayEvery', '../internal/baseCallback', '../internal/baseEvery', '../lang/isArray'], function(arrayEvery, baseCallback, baseEvery, isArray) {

  /**
   * Checks if `predicate` returns truthy for **all** elements of `collection`.
   * The predicate is bound to `thisArg` and invoked with three arguments;
   * (value, index|key, collection).
   *
   * If a property name is provided for `predicate` the created `_.property`
   * style callback returns the property value of the given element.
   *
   * If a value is also provided for `thisArg` the created `_.matchesProperty`
   * style callback returns `true` for elements that have a matching property
   * value, else `false`.
   *
   * If an object is provided for `predicate` the created `_.matches` style
   * callback returns `true` for elements that have the properties of the given
   * object, else `false`.
   *
   * @static
   * @memberOf _
   * @alias all
   * @category Collection
   * @param {Array|Object|string} collection The collection to iterate over.
   * @param {Function|Object|string} [predicate=_.identity] The function invoked
   *  per iteration.
   * @param {*} [thisArg] The `this` binding of `predicate`.
   * @returns {boolean} Returns `true` if all elements pass the predicate check,
   *  else `false`.
   * @example
   *
   * _.every([true, 1, null, 'yes'], Boolean);
   * // => false
   *
   * var users = [
   *   { 'user': 'barney', 'active': false },
   *   { 'user': 'fred',   'active': false }
   * ];
   *
   * // using the `_.matches` callback shorthand
   * _.every(users, { 'user': 'barney', 'active': false });
   * // => false
   *
   * // using the `_.matchesProperty` callback shorthand
   * _.every(users, 'active', false);
   * // => true
   *
   * // using the `_.property` callback shorthand
   * _.every(users, 'active');
   * // => false
   */
  function every(collection, predicate, thisArg) {
    var func = isArray(collection) ? arrayEvery : baseEvery;
    if (typeof predicate != 'function' || typeof thisArg != 'undefined') {
      predicate = baseCallback(predicate, thisArg, 3);
    }
    return func(collection, predicate);
  }

  return every;
});