Databases
StackOverflow2013
Postsdbo
POJavascript object creation best practice
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POJavascript object creation best practice
    primarykey
    data
    text
    <p>I have the following javascript :</p> <pre><code> var MyObject = (function() { function Setup(args) { this.prop1 = args.x; this.prop2 = args.y this.prop3 = this.prop1 + this.prop2; this.Create = function() { return 'a' + helperFunc(); } function helperFunc() { return this.prop3; } } return { init : function(args) { var setup = new Setup(args); setup.Create(); } } })(); $(function() { MyObject.init(someArgs); }); </code></pre> <ol> <li><p>Is my approach to object construction a good practice?</p></li> <li><p>I am getting <code>undefined</code> in the helperFunc when trying to access <code>this.prop3</code>.</p></li> <li><p>I have also tried to assign <code>this.prop1 + this.prop2</code> to a local variable and use a function to return this value like so:</p> <pre><code> function Setup(args) { var total; this.prop1 = args.x; this.prop2 = args.y total = this.prop1 + this.prop2; this.getTotal = function() { return total; }; this.prop3 = this.prop1 + this.prop2; ... </code></pre></li> </ol> <p>...and when calling this in the helperFunc like this:</p> <pre><code> return this.getTotal(); </code></pre> <p>.. i get <code>this.getTotal</code> is not a function</p> <p>I have been reading around object creation and using closures to mimic private members and so on and since there is no one way to define objects I am getting confused.</p> <p>TBH - I don't really understand the construct:</p> <pre><code> var myObject = (function() { ... } (); </code></pre> <p>I've seen it used a lot in jQuery plugins but what does the first parenth followed by empty parenth at the end mean and do?</p> <p>Any knowledge imparted would be much appreciated.</p> <p>Also, I have on order the Douglas Crockford book on javascript and until it arrives I need to try to solve this problem</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USAlan Alcock
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POJavascript object creation best practice
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POJavascript object creation best practice
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POJavascript object creation best practice
      1. This table or related slice is empty.
      1. VTUpMod
    1. COhttp://stackoverflow.com/questions/3921922/what-does-this-mean-function-x-y-a-b-in-javascript
      singulars
      1. POJavascript object creation best practice
      1. USmplungjan
    2. COThere are a lot of questions here. It would make it a lot easier to provide accurate and precise answers if you try to limit yourself to one question per question.
      singulars
      1. POJavascript object creation best practice
      1. USPaul Butcher
    3. COmplungjan - that is a perfect link to understanding the parenth at the end of a function call. I just need to understand why I'm getting undefined when calling a property and not a function when calling a function...
      singulars
      1. POJavascript object creation best practice
      1. USAlan Alcock
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload