Using call and apply to pass parameters to a function

JS in the function object has call and apply two method properties, both using the same method and function, just the format of passing parameters, call pass a single parameter, apply one time to pass an array of parameters.

These two methods can change the calling object of a function and pass arguments to the function. Such as:

function Send (str,speak) {   speak.call (THIS,STR);    Send (~) ==window.speak (str), this sentence will be called immediately to execute this function}send ("Hello!", function (Strword) {  //here with an anonymous function object as a parameter    console.log ( Strword);});

Here this refers to the Window object (not clear words can see me on the Bias blog), this parameter is passed to the function parameters, the result will be output "Hello!" "。

Using call and apply to pass parameters to a function