Lodash before method
语法
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.
参数
n (number) − The number of calls at which func is no longer invoked.
func (Function) − The function to restrict.
输出
(Function) − Returns the new restricted function.
实例
var _ = require('lodash');
var raiseAlarm = _.before(3, function(){ console.log('Alarm raised.')});
//Alarm raised will be called two times
raiseAlarm();
raiseAlarm();
raiseAlarm();
raiseAlarm();
Save the above program in
tester.js. Run the following command to execute this program.
Command
输出
Alarm raised.
Alarm raised.
