zecar

Array.prototype.betterFilter = function(expression) {
	var res = [];
	for(var idx=0; idx<this.length; idx++){
		var currentItem = this[idx];
		if(expression(currentItem)){
			res.push(currentItem);
		}
	}
	return res;

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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albrow

// convert the ip address to a decimal
// assumes dotted decimal format for input
function convertIpToDecimal(ip) {
        // a not-perfect regex for checking a valid ip address
	// It checks for (1) 4 numbers between 0 and 3 digits each separated by dots (IPv4)
	// or (2) 6 numbers between 0 and 3 digits each separated by dots (IPv6)
	var ipAddressRegEx = /^(\d{0,3}\.){3}.(\d{0,3})$|^(\d{0,3}\.){5}.(\d{0,3})$/;
	var valid = ipAddressRegEx.test(ip);
	if (!valid) {
		return false;