Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>There are so many ways to implement a <code>super</code> feature in JavaScript. For instance:</p> <pre><code>function SuperClass(someValue) { this.someValue = someValue; } SuperClass.prototype.method1 = function () { return this.someValue; }; function SubClass(someValue) { //call the SuperClass constructor this.super.constructor.call(this, someValue); } //inherit from SuperClass SubClass.prototype = Object.create(SuperClass.prototype); //create the super member that points to the SuperClass prototype SubClass.prototype.super = SuperClass.prototype; SubClass.prototype.method2 = function () { alert(this.super.method1.call(this)); }; var sub = new SubClass('some value'); sub.method2(); </code></pre> <p>EDIT:</p> <p>Here's an example of an extremely generic <code>super</code> method that relies on non-standard features. <strong>I really do not recommend this and it's just there as learning purposes.</strong></p> <pre><code>Object.prototype.super = function () { var superProto = Object.getPrototypeOf(Object.getPrototypeOf(this)), fnName = arguments.callee.caller.name, constructorName = this.constructor.name; if (superProto == null) throw constructorName + " doesn't have a superclass"; if (typeof superProto[fnName] !== 'function') { throw constructorName + "'s superclass (" + superProto.constructor.name + ") doesn't have a " + fnName + ' function'; } return superProto[arguments.callee.caller.name].apply( this, [].slice.call(arguments, 1) ); }; function A() { } A.prototype.toString = function toString() { //call super method Object.prototype.toString return this.super(); }; var a = new A(); console.log(a.toString()); </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POJavascript inheritance with access to *all* methods in 'superclass'?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USplalx
    1. USplalx
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POJavascript inheritance with access to *all* methods in 'superclass'?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COOne of the Javascript plagues - "there are so many ways" :-) So now is the time to write my own subclassing function! SO many repetitions of `Superclass` and `Subclass` and `prototype` -- doesn't look DRY at all... Thanks anyway
      singulars
      1. PO
      1. USvirtualnobi
    2. CO@virtualnobi You can definitely make this DRYer especially if you encapsulate the inheritance process within a function. You could always push it the the extreme and have an extremely generic `super` method but I wouldn't recommend this.
      singulars
      1. PO
      1. USplalx
 

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