Comments on: Type Detection

By: Andrew III

Andrew III — Mon, 12 Nov 2007 01:52:50 +0000

It helps me a lot.. Tnx..

By: admin

admin — Mon, 15 Oct 2007 22:57:53 +0000

Garrett, while it is true that there are many other “types” in JavaScript (and you can create an unlimited number yourself). These 7 meta-types are native Objects and/or have special properties that make them unique. I have also revisited this subject here:

http://mattsnider.com/core/type-detection-revisited/

By: Garrett

Garrett — Wed, 10 Oct 2007 23:14:39 +0000

There are more built-ins than you listed.

Global
Object
Function
Array
String
Boolean
Number
Math
Date
RegExp
All the Error objects (EvalError, RangeError, et c.)

Your typechecking functions won’t work across frames.

By: Type Detection Revisited | Matt Snider JavaScript Resource

Type Detection Revisited | Matt Snider JavaScript Resource — Wed, 12 Sep 2007 05:09:08 +0000

[...] Graves, recently commented on my Type Detection article showing a novel way to do type detection. Here is his code [...]

By: admin

admin — Sun, 09 Sep 2007 18:30:51 +0000

Thanks Mikol. This looks simple and impressive. I’m going to use this as material for my Tuesday article this week.

By: Mikol Graves

Mikol Graves — Sun, 09 Sep 2007 14:17:28 +0000

Here’s a more robust isDate implementation:

return (o != null && typeof o == ‘object’ && o.constructor.toString() == Date.toString());

The same principle can be used for all isTYPE implementations.

Cheers,
m