Call () and apply () methods

is still in the initial stage of learning JavaScript, so understanding is relatively superficial, is a simple pattern of understanding. Take a note here and let yourself remember it more when you look back.

The form of call () and apply ()

A.call (B, "", "", "") a.apply (b,[])

Enables an object in B to use A's method, that is, a to provide a method, B to provide an object

The difference is that the second argument of apply must be an array

Reference: http://blog.csdn.net/business122/article/details/8000676

Call () and apply () methods