How to use string as a object method?

Question

I am trying to use an element class name and call it as a method for my object.

 var thisClass=$this.attr('class')
 //thisClass = 'call'               

 obj.thisClass(ID);

My codes don't work as I wanted to be. Are there anyways to solve this? Thanks a lot!

array-access notation: obj[thisClass](ID)

zzzzBov
– zzzzBov

2012-10-05 00:04:56 +00:00
Commented Oct 5, 2012 at 0:04 — zzzzBov
– zzzzBov, Commented Oct 5, 2012 at 0:04

Marten · Accepted Answer · 2012-10-05 00:09:24Z

3

You can do

obj[methodName](arguments, ...);

This works because functions are objects as well in javascript and are themselves only attributes of their objects. Object properties can be accessed with the . and the [] notation whereas the [] notations is needed for dynamic names or names that are not legal javascript identifiers.

answered Oct 5, 2012 at 0:09

Marten

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1 Comment

RobG Over a year ago

Whether to use dot or bracket notation can be explained as: dot notation can only be used for property names that are valid identifiers, square bracket notation must be used for everything else (expressions, string literals, numbers, etc.). E.g. numeric array members are accessed as arr[0] and not arr.0 because 0 is not a valid identifier.

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