Question

For example,

Math.mymfunc = function (x) {   
    return x+1;
}

will be treated as a property and when I write

for(var p in Math.__proto__) console.log(p)

it will be shown. But the rest of Math functions will not. How can I get all functions of a Math object?

Answer 1

Object.getOwnPropertyNames(Math); is what you are after.

This logs all of the properties provided you are dealing with an EcmaScript 5 compliant browser.

var objs = Object.getOwnPropertyNames(Math);
for(var i in objs ){
  console.log(objs[i]);
}