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When looking at the source code for raphael or g.raphael or other libraries I've noticed the developer does something like this:
var val = Math.max.apply(Math, data_array);
Why not just invoke the function directly, such as:
var val = Math.max(data_array);
Thanks.
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The Difference Between call() and apply() The difference is: The call() method takes arguments separately. The apply() method takes arguments as an array. The apply() method is very handy if you want to use an array instead of an argument list.
There is a very slight difference between calling and invoking a function. In JavaScript functions can be invoked without being called which means that the code inside the body of the function can be executed without creating an object for the same.
Summary. call : binds the this value, invokes the function, and allows you to pass a list of arguments. apply : binds the this value, invokes the function, and allows you to pass arguments as an array. bind : binds the this value, returns a new function, and allows you to pass in a list of arguments.
call and apply are very similar—they invoke a function with a specified this context, and optional arguments. The only difference between call and apply is that call requires the arguments to be passed in one-by-one, and apply takes the arguments as an array.
Math.max won't accept a list by default. "apply" allows you to unpack the list to arguments so that max works correctly.
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