_.remove(array, [predicate=_.identity])

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_.remove(array, [predicate=_.identity])

_.remove删除所有predicate处理后返回true的数组元素，返回值是被删除元素组成的数组，predicate函数接受三个参数，当前元素值，元素索引，数组本身

参数

array (Array): 需要修改的数组
[predicate=_.identity] (Function): 判断每个元素的遍历器

返回值

(Array):返回删除元素后的原数组

例子

var array = [1, 2, 3, 4];
var evens = _.remove(array, function(n) {
  return n % 2 == 0;
});
 
console.log(array);
// => [1, 3]
 
console.log(evens);
// => [2, 4]

源代码：

basePullAt之前看过了，这里省略

import basePullAt from './.internal/basePullAt.js'

/**
 * Removes all elements from `array` that `predicate` returns truthy for
 * and returns an array of the removed elements. The predicate is invoked
 * with three arguments: (value, index, array).
 *
 * **Note:** Unlike `filter`, this method mutates `array`. Use `pull`
 * to pull elements from an array by value.
 *
 * @since 2.0.0
 * @category Array
 * @param {Array} array The array to modify.
 * @param {Function} predicate The function invoked per iteration.
 * @returns {Array} Returns the new array of removed elements.
 * @see pull, pullAll, pullAllBy, pullAllWith, pullAt, reject, filter
 * @example
 *
 * const array = [1, 2, 3, 4]
 * const evens = remove(array, n => n % 2 == 0)
 *
 * console.log(array)
 * // => [1, 3]
 *
 * console.log(evens)
 * // => [2, 4]
 */
//删除所有predicate处理后返回true的数组元素，返回值是被删除元素组成的数组
//predicate函数接受三个参数，当前元素值，元素索引，数组本身
function remove(array, predicate) {
  const result = []//被删除的元素存放的数组，最后会被返回
  if (!(array != null && array.length)) {//如果array为null或者array没有length，不作操作返回空数组
    return result
  }
  let index = -1//循环索引
  const indexes = []//要被删除的元素的索引
  const { length } = array//数组长度

  while (++index < length) {
    const value = array[index]//数组当前值
    if (predicate(value, index, array)) {//如果根据当前值调用predicate后返回true，result数组里push进值，indexed数组里push进索引
      result.push(value)
      indexes.push(index)
    }
  }
  basePullAt(array, indexes)//调用basePullAt删除所有索引对应的值
  return result//返回被删除的元素组成的数组
}

export default remove