How to filter Object using Array.prototype.filter?

Question

Given

var arr = [1,2,true,4,{\"abc\":123},6,7,{\"def\":456},9,[10]]

we can filter number items within array arr using N

Answer 1

How to filter objects with or without Object prototype or constructor within in an array passed to Array.prototype.filter() without using an anonymous function callbackpattern ?

As per spec

callbackfn should be a function that accepts three arguments and returns a value that is coercible to the Boolean value true or false

Number object (function's constructor) does return NaN for bad Number conversion but String and Object constructors don't return a false value (yes, filter(Number) also filters out 0)

var arr = [0,1,2,true,4,{"abc":123},6,7,{"def":456},9,[10]];
arr.filter(Number); //outputs [1, 2, true, 4, 6, 7, 9, Array[1]]

You can create a customer function OBJ,

function OBJ(value,index,arr){ return typeof value === "object" && !Array.isArray(value) }

or Arrays are also welcome in the resultset then remove the Array.isArray check

function OBJ(value,index,arr){ return typeof value === "object" }

when used with

arr.filter(OBJ); //outputs [{"abc":123},{"def":456}]