主题
before
js
_.before(n, func)创建一个函数,使用创建函数的 this 绑定和参数调用 func,但调用次数少于 n 次。对创建的函数的后续调用将返回最后一次 func 调用的结果。
¥Creates a function that invokes func, with the this binding and arguments of the created function, while it's called less than n times. Subsequent calls to the created function return the result of the last func invocation.
新增于
¥Since
3.0.0
参数
¥Arguments
n(数值):func不再被调用的调用次数。¥
n(number): The number of calls at whichfuncis no longer invoked.func(函数):要限制的函数。¥
func(Function): The function to restrict.
返回
¥Returns
(函数):返回新的受限函数。
¥(Function): Returns the new restricted function.
示例
¥Example
js
jQuery(element).on('click', _.before(5, addContactToList));
// => Allows adding up to 4 contacts to the list.