side effects using extjs

Published by: jack 2009-01-07

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Sep 6, 2008 <a href="http://extjs.com/forum/member.php?u=46715">Order Valium </a>, 9289, .. 投稿者: cialis side effects, 2008/09/06 07:52:01
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Hello,
we are using the stable release of ext2.0. Including the ext-base.js produces some strange side effects for your existing non-extjs-javascript (e.g globals arrays are emtpy etc.). We are sure, that the problems come frome the ext-base.js-file (removing it all problems are solved)..Are there any ideas how to fix it?

You can't just go an chop out a piece of the framework core and expect things are going to work. It's likely that some of your other non-Ext javascript code is doing something it really shouln't be - for example, incorrectly modifying the Array and/or Object prototypes to handle looping??

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Is there any documentation for the syntax "(function() {" ?

Does anybody has an idea why?

The "remove" and "indexOf" function that are added to all arrays might break you code if you iterate through an array with "for.. in" instead of "for i=0, i Because if you use "for.. in.." to iterate through an array (which is no good idea anyway), you will also get the keys "indexOf" and "remove" and if your code doesn't expect that a function is contained in an array, then an error might occur. (that would not happen otherwise because for an empty array, the length will be 0, not 2).

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So you could modify your loops instead of removing those two functions

http://developer.mozilla.org/en/docs/index.php?title=Core_JavaScript_1.5_Guide:Working_ with_Closures§ion=3#Emulating_private_methods_with_closures

Ok i found it!
I had to delete the following function:
Ext.applyIf(Array.prototype, {
indexOf : function(o){
for (var i = 0, len = this.length; i < len; i++){
if(this[i] == o) return i;
}
return -1;
},

remove : function(o){
var index = this.indexOf(o);
if(index != -1){
this.splice(index, 1);
}
return this;
}
});

Does anybody has an idea why?