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javascript Programming Glossary: myobjectHow does “this” keyword work within a JavaScript object literal? http://stackoverflow.com/questions/133973/how-does-this-keyword-work-within-a-javascript-object-literal new keyword. function Foo this.confusing 'hell yeah' var myObject new Foo When invoked as a constructor a new Object will be created..
Instantiate a JavaScript Object Using a String to Define the Class Name http://stackoverflow.com/questions/1366127/instantiate-a-javascript-object-using-a-string-to-define-the-class-name Instantiate the object using the class name string var myObject new classNameString javascript oop share improve this question..
How to access a numeric property? http://stackoverflow.com/questions/2026741/how-to-access-a-numeric-property to access a numeric property I have an object like var myObject '0' 'blue' Now when I try to access the value of the key '0'.. Now when I try to access the value of the key '0' like myObject.0 ...I am getting an error. Maybe this is not the proper way.. share improve this question This should work myObject 0 myObject propertyName is an alternative syntax for myObject.propertyName..
Create an empty object in JavaScript with {} or new Object()? http://stackoverflow.com/questions/251402/create-an-empty-object-in-javascript-with-or-new-object you to instantly populate the object inline like so var myObject title 'Frog' url ' img picture.jpg' width 300 height 200 Arrays..
Elements order in a “for (??in ??” loop http://stackoverflow.com/questions/280713/elements-order-in-a-for-in-loop once and will never be modified. Suppose I have var myObject A Hello B World And I further use them in for var item in myObject.. A Hello B World And I further use them in for var item in myObject alert item myObject item Can I expect 'A Hello ' to always come.. I further use them in for var item in myObject alert item myObject item Can I expect 'A Hello ' to always come before 'B World..
Javascript Closures and 'this' context http://stackoverflow.com/questions/346015/javascript-closures-and-this-context object I have created that looks something like this var myObject AddChildRowEvents function row p2 if document.attachEvent row.attachEvent.. the 'DoSomething' function 'this' does not refer to 'myObject' what am I doing wrong javascript closures share improve..
Why does a results vary based on curly brace placement? http://stackoverflow.com/questions/3641519/why-does-a-results-vary-based-on-curly-brace-placement fantastic effectively the same as this function test var myObject new Object myObject.javascript fantastic return myObject share.. the same as this function test var myObject new Object myObject.javascript fantastic return myObject share improve this answer..
Can Read-Only Properties be Implemented in Pure JavaScript? http://stackoverflow.com/questions/366047/can-read-only-properties-be-implemented-in-pure-javascript an object literal or by calling a method on an object. var myObject get readOnlyProperty return 42 alert myObject.readOnlyProperty.. object. var myObject get readOnlyProperty return 42 alert myObject.readOnlyProperty 42 myObject.readOnlyProperty 5 Assignment is.. return 42 alert myObject.readOnlyProperty 42 myObject.readOnlyProperty 5 Assignment is allowed but doesn't do anything..
In Javascript, why is the “this” operator inconsistent? http://stackoverflow.com/questions/80084/in-javascript-why-is-the-this-operator-inconsistent But if you have an object and call a function on it like myObject.myFunction Then this inside myFunction will refer to myObject... Then this inside myFunction will refer to myObject. Make sense To get around it you need to use closures... You..
How do I enumerate the properties of a javascript object? http://stackoverflow.com/questions/85992/how-do-i-enumerate-the-properties-of-a-javascript-object this question Simple enough for var propertyName in myObject propertyName is what you want you can get the value like this.. is what you want you can get the value like this myObject propertyName Now you will not get private variables this way..
What is the difference between an array and an object? http://stackoverflow.com/questions/874205/what-is-the-difference-between-an-array-and-an-object Array myArray 'A' Athens myArray 'B' Berlin and var myObject 'A' 'Athens' 'B' 'Berlin' because they both behave the same.. they both behave the same and also typeof myArray typeof myObjects both yield 'object' . Is there any difference between these..
Handlebars/Mustache - Is there a built in way to loop through the properties of an object? http://stackoverflow.com/questions/9058774/handlebars-mustache-is-there-a-built-in-way-to-loop-through-the-properties-of myArray Index @index Value this each For objects #each myObject Key @key Value this each Note that only properties passing the..
JavaScript instance functions versus prototype functions [duplicate] http://stackoverflow.com/questions/1441212/javascript-instance-functions-versus-prototype-functions of these a new function object must be created for each MyObject instance whereas there's only a single function object per 'shared'..
js call() & apply() vs bind()? http://stackoverflow.com/questions/15455009/js-call-apply-vs-bind in async callbacks and events. I do this a lot function MyObject element this.elm element element.addEventListener 'click' this.onClick.bind.. 'click' this.onClick.bind this false MyObject.prototype.onClick function e without bind the context of this.. e without bind the context of this function wouldn't be a MyObject instance as you would normally expect. I use it extensively..
new MyObject(); vs new MyObject; http://stackoverflow.com/questions/3034941/new-myobject-vs-new-myobject MyObject vs new MyObject In some JavaScript code snippets e.g. http.. MyObject vs new MyObject In some JavaScript code snippets e.g. http mckoss.com jscript..
JavaScript dependency management http://stackoverflow.com/questions/3202606/javascript-dependency-management function which is referenced in another function g MyObject.g function var a new Array a.f I want to be able to detect that.. use of globals defined in other files such as use of MyObject you couldn't realistically track usage of prototype extension..
http://stackoverflow.com/questions/337878/var-self-this called the callback . So my code looks like this function MyObject this.doSomething function ... var self this '#foobar' .bind..
reference variable in object literal? http://stackoverflow.com/questions/4858931/reference-variable-in-object-literal at this stage is to use a constructor instead function MyObject this.var1 1 this.var2 2 this.var3 this.var1 this.var2 myfunc..
jQuery memory leak patterns and causes http://stackoverflow.com/questions/5046016/jquery-memory-leak-patterns-and-causes to JQuery. Take the following code for example function MyObject function var _this this this.count 0 this.getAndIncrement function.. return _this.count for var i 0 i 10000 i var obj new MyObject obj.getAndIncrement It will look normal until you look at memory.. look normal until you look at memory usage. Instances of MyObject are never deallocated while the page is active due to the _this..
How does JavaScript .prototype work? http://stackoverflow.com/questions/572897/how-does-javascript-prototype-work function alert 'Hello ' this is wrong function MyObject a first class functional object MyObject.prototype.test function.. is wrong function MyObject a first class functional object MyObject.prototype.test function alert 'OK' OK Also these slides really..
Is it possible to implement dynamic getters/setters in JavaScript? http://stackoverflow.com/questions/7891937/is-it-possible-to-implement-dynamic-getters-setters-in-javascript by doing something like this A trivial example function MyObject val this.count 0 this.value val MyObject.prototype get value.. example function MyObject val this.count 0 this.value val MyObject.prototype get value return this.count 2 Go away this._value.. set value val this._value val this.count var a new MyObject 'foo' alert a.value Go away a.value 'bar' alert a.value bar2..
How to get Javascript in a QWebView to create new instances of C++ based classes? http://stackoverflow.com/questions/943554/how-to-get-javascript-in-a-qwebview-to-create-new-instances-of-c-based-classes like this which returns a QObject derived class instance MyObject MyApp helloWorld MyObject is dervied from QObject return new.. QObject derived class instance MyObject MyApp helloWorld MyObject is dervied from QObject return new MyObject I can call this.. helloWorld MyObject is dervied from QObject return new MyObject I can call this slot from javascript successfully like this..
Where is my 'this'? Using objects method as a callback function http://stackoverflow.com/questions/1085674/where-is-my-this-using-objects-method-as-a-callback-function to the global object if you call it like method invokation myobject.myfunction this gets bound to myobject you can also call it.. method invokation myobject.myfunction this gets bound to myobject you can also call it like so call invokation myfunction.call.. can also call it like so call invokation myfunction.call myobject in which case this gets bound to myobject there is also constructor..
jQuery .css() function not returning expected values http://stackoverflow.com/questions/5475589/jquery-css-function-not-returning-expected-values of #myObj as a string with px on the end. In Pseudocode #myobject width 14em height 14em div id myobject Has Text div script type.. end. In Pseudocode #myobject width 14em height 14em div id myobject Has Text div script type text javascript '#myobject' .click.. div id myobject Has Text div script type text javascript '#myobject' .click function alert this .css 'width' n this .width script..
Javascript use variable as object name http://stackoverflow.com/questions/6084858/javascript-use-variable-as-object-name to access an object. Let's say I have an object named myobject. I want to fill a variable with this name and use the variable.. the variable to access the object. Example var objname 'myobject' objname .value 'value' javascript share improve this question..
jQuery.bind() events on plain Javascript objects http://stackoverflow.com/questions/9099555/jquery-bind-events-on-plain-javascript-objects bind jQuery events to plain non DOM Javascript objects var myobject myobject .bind foobar function alert daa myobject .trigger foobar.. events to plain non DOM Javascript objects var myobject myobject .bind foobar function alert daa myobject .trigger foobar What.. var myobject myobject .bind foobar function alert daa myobject .trigger foobar What are the implications for Garbage collection..
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