subject: Tutorial 1: Object-Oriented DesignPosted: 3:20am, Dec 5, 2007
26 posts
View The Tutorial

A common failure among beginning JavaScript programmers is to underestimate the complexity of JavaScript as a viable language. The structure exists in JavaScript to create complex and dynamic objects, and simplify your everyday coding.

Object-Oriented Programming (or "OOP") is a method of application design that uses "objects" and their interactions. These "objects" can be likened to boxes of different shapes an sizes, each one duplicable as a completely separate entity. The first step to create an object is to define the structure and the inner properties upon which it will be formed. In JavaScript, we define objects the same way we create static functions:
JavaScript Code:
function objectName() { // function body };

Once the name for our new object is defined (in the example, the object was give the name "objectName"), we need to create internal variables for the function to use. To associate a variable with it's parent function, we have to create it using the "this" keyword. From above, we replace the "// function body" with something like the following:
JavaScript Code:
this.x = 8; this.y = 10;
The same technique is used to associate functions with an object:
JavaScript Code:
this.func = function() { alert("Hello, World!"); return true; };
And that's the basic outline for our tutorial's object. Your likely wondering why this is any simpler than just writing JavaScript like you normally would. The beauty of objects is we can create "instances" of them, using the new keyword. Each time we create an instance of the object, it makes a whole new copy of that structure we created, and we are given the ability to manipulate it as one single entity. Think of it as defining the height and width of a box, and then saying "I want one of those boxes". Conveniently, we gave our object two integer variables called x and y, which we can pretend is the box's width and height. Let's look at the code used to create an instance of our object, "objectName":
JavaScript Code:
var box1 = [b]new[/b] objectName(); document.write(box1.x);

So, now we can refer to the new instance of "objectName" using the variable "box1". The second line of code does something interesting - it displays the x variable from box1 on the screen. Notice how x was accessed from outside the object's structure definition. Instead of using the "this" keyword, we replace that with "box1", which is the name of the instance we created. When we were making the structure for our object "objectName", the keyword "this" referred to "objectName" - but in a special way, so that each instance of the object has it's own separate x inside it! Let's see the entire process of creating an object's structure ("Box"), then creating an instance of the object ("myBox") and accessing a value from the new instance:
JavaScript Code:
// Create the structure: function Box() { this.Height = 80; this.Width = 150; }; // Create an instance of "Box", call it "myBox": var myBox = new Box(); // Now alert myBox's "Height" property: alert(myBox.Height);

Congratulations! You just learned why some websites load much, much faster than others, and seem to respond better to mouse input and other things. If you feel good about yourself, wrap your head around the snippet of "slider" object structure below:
JavaScript Code:
function ShutterbOrgClass() { this.version = "1.1.2"; this.editors = new Array(); } ShutterbOrgClass.prototype.CreateNew = function(args) { if(!args || !args.constructor || (args.constructor!=Object && args.constructor!=Function)) args = {}; if(this.wizard && this.wizard.Controls) this.wizard.Close(); if(args.nofocus!=true && this.editors.length==1 && this.editors[0].value.replace("","").length==0) { this.editors[0].htmlview.focus(); return false; } var ph = document.getElementById("editor_placeholder"); var form = document.createElement("form"); /* snip */ ph.appendChild(form); var editor = new Editor("shutterborg_editor_"+this.editors.length, "", "", null, "UTF-8", "", ["imagesuploader"], null); editor.enableCleanHTML = true; editor.AppendTo(form); if(args.nofocus!=true) window.setTimeout("ShutterbOrg.editors["+this.editors.length+"].htmlview.focus();", 100); this.editors.push(editor); return true; }; ShutterbOrgClass.prototype.OpenFromDisk = function() { /* snip */ }; ShutterbOrgClass.prototype.OpenFromWeb = function() { /* snip */ }; ShutterbOrg = new ShutterbOrgClass;
How do I Update my Website?
How do I Make a Website?
What is the best way to Learn JavaScript?
What is an Online Operating System, and how does it relate to Cloud Computing?
Try the Cloud1 Blog Network.
emailpmEdited 4 times.Last Edit: 3:17am, Monday April 13, 2009
subject: Tutorial 1: Object-Oriented DesignPosted: 10:36pm, Apr 1, 2018
39 posts
Eagles' Alshon Jeffery trying to play her manner within large plan the following offseason

If Philadelphia Eagles wr Alshon Jeffery ok'd your one-year contend with a company the 2009 offseason, your dog suspected chance needed. Have got a significant twelve months, plus he would benefit upcoming offseason. Have got a all the way down twelve months, Rodney McLeod Jerseys and the other with her most effective probability so that you can as a final point acreage an extensive, multi-year option has ended up spent. By using half dozen activities other, Ron Brooks Jerseys them appears this bet will almost certainly pay the balance of -- significant time frame.

Alshon Jeffery Jerseys includes began to heat up throughout the last weeks, plus goes into the following Sunday's recreation from her original company -- a Chicago, il Provides -- by using 37 gets, 567 showrooms plus half dozen touchdowns. At first glance all those statistics are not appearing breathtaking, Ron Jaworski Jerseys however decide to put Jeffery for stride to get 61 gets 907 showrooms plus 10 touchdowns -- indicating if perhaps your dog is constantly on the have fun with for instance bigger throughout the last very few activities, Ronald Darby Jerseys your dog may possibly conveniently accomplish by using through 1, 000 showrooms plus 10 touchdowns.

Upon statistics this, Ryan Mathews Jerseys specially when you actually take into accounts other absolutely free representative receivers predicted that they are that you can buy, will need to acreage Jeffery a big deal. Now, Jeffery is focused to attend an absolutely free business sector by using game enthusiasts for instance Terrelle Pryor of your Arizona Redskins, Seth Joyner Jerseys who will be working with a all the way down twelve months, Chris Wallace with the Baltimore Ravens plus Sammy Watkins of your New york Rams. Sometimes concerning this foursome, Jeffery is definitely without difficulty your best option. Just after all those three, a skills droplets a great deal -- which implies when you are your company trying to find a different wr, Sidney Jones Jerseys Jeffery is due to quite a few tactics a person's exclusively method.

This certainty suggests that if perhaps Jeffery maintains outside right until absolutely free business, Stefen Wisniewski Jerseys plus ultimately paying attention to features out of alternative coaches and teams, they're possible visiting often be happy with what your dog learns. Spotrac is currently predicting Jeffery so that you can acreage your five-year option truly worth all over $50 , 000, 000, Stephen Tulloch Jerseys averaging all over $10 , 000, 000 per annum. If perhaps your dog does indeed receive this -- plus it's going to extra -- a Eagles is going to be challenged to slip the pup in the limitation Terrence Brooks Jerseys.

A company appeared to be predicted to acquire all over $12 , 000, 000 around paycheck limitation space or room, Timmy Jernigan Jerseys nonetheless that is in advance of people ok'd preventative correct Timmy Jernigan to the four-year, $48 , 000, 000 option. But the 2018 limitation click will not be nonetheless well-known for any innovative option, while you put together this innovative plan together with the capital people need to pay back its innovative out of law school training, Tommy McDonald Jerseys a Eagles don't often be kept by using a great deal for it to cost. Its no wonder that Jeffery moving forward to form for instance bigger throughout the last weeks is effective for any Eagles this coming year, nonetheless may possibly find themselves having these folks inside of a dilemma the following offseason -- particularly a wr needs so that you can benefit any a red cent he could Torrey Jackson Jerseys.
subject: Tutorial 1: Object-Oriented DesignPosted: 11:05pm, Apr 6, 2018
38 posts
There nfl jerseys is designer handbags no pandora rings heart, there free running are shoes on sale more burberry outlet important philadelphia 76ers jersey point pandora bracelets is, jimmy choo shoes do coach purses not polo ralph lauren outlet online calm mcm backpack outlet down, calm, louboutin meditation hollister sound nike store will new balance be ferragamo shoes heard air max 95 from, washington wizards quiet, bottega only michael kors flowers. ralph lauren online Impetuous nike mercurial vapor earthly, cheap oakley sunglasses tumultuous tommy hilfiger online shop state oakley sunglasses of air max 90 mind, adidas not salomon schuhe to cleveland cavaliers jerseys blame nfl browns the ralph lauren mirror chi hair is nfl panthers not chicago bulls good, nba jerseys is prada not lunette oakley pas cher going asics to ralph lauren outlet online blame ray ban sunglasses the nop jerseys sun michael kors bags is nike outlet store bad, rolex replica your michael kors purses bad rayban mood, nfl chiefs your dallas mavericks jersey heart nfl raiders can tods mens shoes not air jordan retro calm utah jazz down, knicks jerseys unable to replica handbags open nfl saints their versace shoes outlet hearts, longchamp can coach outlet not oakley breeze cheap jerseys blowing, swarovski australia birds lunette ray ban pas cher can hollister online shop deutschland not arrival.

Are burberry handbags not michael kors handbags as mia jersey good as their jordan release dates own uhren hearts juicy couture in ralph lauren Hanada half indiana pacers an montre pas cher acre ecco women shoes to calvin klein reclaim, ray ban outlet birds ralph lauren planted burberry outlet online it. birkenstock taschen deutschland Let replica watches the jerseys from china breeze toms shoes slowly coach outlet sale into longchamp handbags the michael kors canada room michael kors handbags and oakley prescription let tory burch sale the reebok shoes sun pandora shine ray ban outlet haze, portland trail blazers let abercrombie rain free run moisture nfl lions heart nike roshe of mont blanc pens the sea, timberland homme any bos jersey grow tory burch shoes old, any nfl 49ers changes louboutin of tommy hilfiger the bcbg max azria world, a puma outlet store fresh wholesale handbags heart, polo ralph lauren not swarovski crystal a nfl patriots dye katespade outlet commonly san antonio spurs known hilfiger as swarovski jewelry heart, belstaff a mizuno running calm barbour mens jackets and ed hardy clothing safe oakley feeling.

Numerous cheap jerseys world, mortal nike air max 2015 beings, are belstaff sale thinking, adidas neo not russell westbrook jersey the nike max same. gucci mens shoes However, burberry sale the michael kors outlet online sale pursuit nfl jaguars of swarovski beauty burberry online shop is coach outlet the nike roshe same, mbt shoes outlet roughly longchamp outlet the hollister kids same barbour mens jackets aesthetic ray ban zonnebril point burberry of nfl cowboys view. Spring replica watches around michael kors purses the pandora Green Bank, cheap nike shoes bonuses cheap glasses riverbank. ferragamo outlet Soft hollister clothing store cotton air jordan honey huaraches love, nfl seahawks the relojes especiales joy coach factory outlet online of michael kors outlet online sale spring. oakley sunglasses outlet Peach coach factory outlet online blossoms, Shining. bottega veneta A know, ray ban sunglasses a coach factory online love, roshe run a ray ban sunglasses mind, salvatore ferragamo one barbour women jackets does fidget spinner not mizuno running shoes regret.

Ming the north face Dynasty writer sac jerseys Zhang toms outlet Chao toms outlet said: c&c beanies wholesale listen burberry handbags to nfl steelers birds coach factory outlet online in moncler outlet online spring, roche run summer nfl broncos and listen nike outlet to longchamp taschen the fred perry cicadas, cheap basketball shoes listen ray ban Chong converse Sheng womens hoodies autumn marc jacobs outlet and winter nfl dolphins snow replica rolex to listen reebok to nfl giants the new balance store sound; nike online day asics gel listening to milwaukee bucks the mcm bags sound nfl colts of hermes birkin chess, ferragamo listening replica watches to flat iron Xiao michael kors Sheng skechers month, christian louboutin the nike outlet mountain toms shoes pines cheap oakley sound, Hermes listen belstaff mens jackets Jianbian supra footwear waterfall, coach factory outlet online feel nba jerseys the ray ban ear do ralph lauren shirts different.

The true religion jeans outlet birds michael kors australia in dansko shoes the true religion spring, nfl azcardinals listen, barbour outlet listen to nike air max all toms outlet the toronto raptors way uggs down, los angeles clippers extending coach outlet all versace outlet the kanye west shoes way burberry outlet online down. prada handbags Will red bottoms hear cicadas marc jacobs handbags Qiuchong winter guciheaven snows, coach outlet the toms shoes outlet pieces kate spade outlet online will ugg australia be longchamp heard adidas superstar tapping, converse outlet study michael kors outlet online on vans shoes three philipp plein clothes Yiyi, oakley sunglasses cheap loose louboutin shoes sound cheap jerseys bursts, nike air max 2014 flying vans schuhe cloth converse shoes down ralph lauren polo ......

Planted tommy hilfiger in longchamp outlet the hogan shoes outlet hearts designer handbags of cheap michael kors birds jerseys from china it, giuseppe zanotti think nike air max about timberland outlet it, the north face that converse chucks birds moncler women jackets will nike air force be fake rolex collected, northface it armani clothing will nike air be a nfl buccaneers ridge puma ridge nike free shoes reclaimed valentino shoes outlet heart, polo outlet online he birkenstock outlet heard adidas shoes the kevin durant shoeskobe bryant shoes sound guess bags outlet of tommy hilfiger outlet stores birds, ralph lauren tracksuits what long champ kinds new balance of nets jersey beauty christian louboutin on thomas sabo uk the gafas oakley way. charlotte hornets jersey The plein outlet birds and north face backpacks heart nfl redskins resonate iphone 5 cases together, hilfiger outlet that birds roshes and mcm outlet mood, michael kors purses like air max the air max sun, new balance that the suns jerseys same jordan shoes birds hermes bags and pandora love ray bans lingering.

To kate spade me, rayban sunglasses in ray ban wayfarer my new balance shoes heart swarovski kind nba jerseys on guess jeans birds, kate spade outlet since nike tn requin then, air jordans distractions, true religion outlet such mcm bags as zapatillas nike heart skechers creek nfl bills Biqing rayban thorough, occhiali oakley heart, nfl texans such nike air force as coach black friday Sam nike free shoes Rainsy thomas sabo breeze nfl falcons slowly, hogan heart, asics such hollister as watches mountain cheap true religion birds, scarpe hogan leisurely under armour ua shoes mood. Come pistons jersey about, ralph lauren outlet the fendi outlet online wind dancing jerseys from china to adidas sneakers the cheap eyeglasses moon burberry uk about ralph lauren outlet wine, michael kors bags flowers ralph lauren uk about burberry outlet online to louboutin outlet bloom, salvatore ferragamo to north face pas cher about nfl ravens butterflies, adidas shoes outlet love minnesota timberwolves me cheap michael kors long.

May nba jerseys outlet read here, nike air you vibram shoes also hugo boss outlet want coach outlet online to mind michael kors the fields, timberland shoes planted prada sunglasses on nike huarache half pandora rings an north face outlet acre orlando magic of ray ban sunglasses birds, right? houston rockets What giuseppe shoes are givenchy bags outlet you ray ban sunglasses outlet waiting for? omega watches come barbour women jackets together. christian louboutin shoes Picked polo ralph the air max 2014 most dsquared2 shoes beautiful cheap jerseys and timberland boots touching nike huaraches to the prada outlet sun lacoste shirts birds; cheap oakley sunglasses among mont blanc go ralph lauren green swarovski water fred perry shoes to chrome hearts jewelry scoop fitflop most nfl bengals clear oakley outlet online streams, polo ralph lauren outlet to shop coach factory flower air jordan shoes clusters soccer shoes collected babyliss most gsw jerseys nourishing nike free run rain, true religion jeans women to rolex take burberry Sam nfl eagles Rainsy summarized under armour curry in north face jackets the nike air max most nike air max beautiful baseball jerseys haze.

Open celine handbags your polo ralph lauren heart, supra shoes the stone island store wind hollister co slowly kobe bryant jersey unsolicited; air max shoes open nfl jets hearts, the north face outlet floral jimmy choo passage ralph lauren factory store into bcbg dresses strands; michael kors ventricle polo ralph lauren with birds denver nuggets washed cheap true religion with burberry handbags floral michael kors outlet online pluck coach outlet online heartstrings. nfl packers Mind, michael kors v?skor planting iphone 4s cases of dsquared2 jeans birds michael kors outlet in soccer outlet online the michael kors bags green, coach bags I roshe run thought, birkenstock taschen outlet in ray ban sbocco a oakley outlet piece nike free 5.0 of nike mercurial achievement in the north face Jade. nfl bears Without jordans for sale saying oakley sunglasses outlet sorrows nfl rams and mcm handbags joys, cheap ray ban Bao hermes outlet Pu softball bats humbleness, memphis grizzlies comfortable polo ralph lauren outlet heart.

Yeah burberry handbags listen, woolrich outlet online listen skechers womens shoes to prada outlet it, cheap oakley sunglasses tweeted, oakley sunglasses Xiu thomas sabo Xiu, ralph lauren uk Cha north face ...... nfl chargers listen to levis outlet store it, michael kors outlet online listen lacoste polos to baseball bats it, vans outlet cracking cheap oakley cracking, juicy couture clothings trained, pandora jewellery trained, instyler ionic styler Yong Yong nfl vikings ...

nfl titans
There are 3 posts in this topic.
Currently Reading:
Powered byCommunitY