A strict equality operator will tell you if two object types are equal. However, is there a way to tell if two objects are equal, much like the hash code value in Java?  Stack Overflow question Is there any kind of hashCode function in JavaScript?...

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I want to write an if/else statement that tests if the value of a text input does NOT equal either one of two different values. Like this (excuse my pseudo-English code):  var test = $("#test").val(); if (test does not equal A or B){     do s...

JavaScript's quirky weakly-typed == operator can easily be shown to be non-transitive as follows:  var a = "16"; var b = 16; var c = "0x10"; alert(a == b && b == c && a != c); // alerts true   I wonder if there are...

I’ve faced with the following problem. I’d like to use java.util.HashMap and java.util.PriorityQueue in Nashorn script, where I need to use particular custom object as a key in the HashMap, and also use HashMap.containsKey() to check if there is...

I've just been looking at the _.isEqual function of Underscore.js and a section of the code goes something like this:  if (a === b) return true;  if (typeof a !== typeof b) return false;  if (a == b) return true;   I'm just wondering if there...

data: function( elem, name, data ) {     if ( !jQuery.acceptData( elem ) ) {         return;     }     elem = elem == window ? windowData : elem;   Copied directly from the jQuery source.  Why is it not safe to use elem === window?  Why does jQuery u...

I found the following jQuery, and it works great for a page that does not have dynamic content in a grid loading on the page as you click from tab to tab. One tabbed section of the grid, the default, will adjust the equal height correctly with the be...

I have a common menu with structure nav > ul > li > a  If li has child dropdown menu I create dropdown toggle  var dropdownToggle = $('<button />', {   'class': 'dropdown-toggle',   'aria-expanded': fals...