Question

I was learning through javascript’s context and .apply() and .call() function and am having trouble with one particular statement.

Math.max.apply( Math, array );

can you explain how it works to provide the maximum number??

Answer 1

apply is a function’s method that calls a the function with the given context object and arguments provided as an array:

var ops = {
   sum : function (a, b) {
       return a + b;
   }
}

ops.sum.apply(ops, [4, 6]); // 10

// is equivalent to:

ops.sum(4, 6);

Math.max returns the largest of zero or more numbers:

Math.max(1,2,3,4); // 4

So, using apply, you have:

Math.max.apply(Math, [1,2,3,4]); // 4

That is equivalent to the code above.