_.takeWhile - 从起始迭代直到返回假值

语法：

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

功能：

• 从array数组的起始元素开始提取元素，，直到 predicate 返回假值。predicate 会传入三个参数： (value, index, array)

  参数：

• array (Array): 要检索的数组

• [predicate=.identity] (Array|Function|Object|string)_: 每次迭代调用的函数

  返回：

• (Array): 返回 array 数组的切片

  例子：

  ```typescript var users = [ { ‘user’: ‘barney’, ‘active’: false }, { ‘user’: ‘fred’, ‘active’: false}, { ‘user’: ‘pebbles’, ‘active’: true } ];

_.takeWhile(users, function(o) { return !o.active; }); // => objects for [‘barney’, ‘fred’]

// The _.matches iteratee shorthand. _.takeWhile(users, { ‘user’: ‘barney’, ‘active’: false }); // => objects for [‘barney’]

// The _.matchesProperty iteratee shorthand. _.takeWhile(users, [‘active’, false]); // => objects for [‘barney’, ‘fred’]

// The _.property iteratee shorthand. _.takeWhile(users, ‘active’); // => [] ```