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Posted By

noah on 07/08/07


Tagged

object toggle library property oo utilities nested


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Toggle value of nested property

 / Published in: JavaScript
 

I feel like I once found an elegant way of setting nested properties without using eval(). However i can't find that code, and atm this is the best I can do.

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  1. //toggle object property value
  2. //only works if the object is in the global scope :(
  3. function tog(propertyStr, value, defaultValue) {
  4.   var property = propertyStr.split('.'); 
  5.   /*   var propAddr = '[' + propertyStr.join('][') + ']'; */
  6.   var propAddrStr = property.shift() + '["' + property.join('"]["') + '"]';
  7.   var propValue = eval(propAddrStr);
  8.   var setPropStr = propAddrStr + '= "' + (propValue == value ? defaultValue : value ) + '"';
  9.   eval(setPropStr);
  10. }

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