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POJavascript array.prototype being printed almost everywhere
 

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  1. POJavascript array.prototype being printed almost everywhere
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    <p>Since I had to remove some elements from my arrays, I followed a few pieces of code found in stackoverflow and came up with this one:</p> <pre><code>Array.prototype.remove = function(from, to) { var rest = this.slice((to || from) + 1 || this.length); this.length = from &lt; 0 ? this.length + from : from; return this.push.apply(this, rest); }; </code></pre> <p>For some reasons, however, this piece of code is being printed EVERYWHERE whenever something has something to with an array.</p> <p>Example:</p> <p>this piece of code:</p> <pre><code>Array.prototype.remove = function(from, to) { var rest = this.slice((to || from) + 1 || this.length); this.length = from &lt; 0 ? this.length + from : from; return this.push.apply(this, rest); }; Scadenza.prototype.init = function() { this.promemoria = (this.promemoria == "")?("NO"):(this.promemoria); var gruppo = this.group; // convert array to string. this.group = ""; for (var i in gruppo) { if (i != (gruppo.length - 1)) { this.group += gruppo[i] + ", "; } else { this.group += gruppo[i]; } } alert(this.group); }; </code></pre> <p>This piece of code is supposed to convert the array this.group (stored temporarily in the variable "gruppo") into a string (that's quite obvious, I think).</p> <p>It is, of course, doing it's job greatly, if it wouldn't be that its alert is:</p> <blockquote> <p>[DATA NEEDED]function (from, to) { var rest = this.slice((to || from) + 1 || this.length); this.length = from &lt; 0 ? this.length + from : from; return this.push.apply(this, rest); }</p> </blockquote> <p>This piece of code is being also sent to a database through an AJAX request and the result of the query, at the desired coloumn, is this one:</p> <blockquote> <p>function (from, to) { var rest = this.slice((to || from) + 1 || this.length); this.length = from &lt; 0 ? this.length + from : from; return this.push.apply(this, rest); },</p> </blockquote> <p>I'm quite surprised this is happening but I have ABSOLUTELY no idea on how to fix it.</p> <p>No errors have been alerted while loading the page or when clicking the button that throws this event.</p> <p>Any idea?</p> <p>ps: Not sure if helps, but I'm using jQuery.</p> <p>@comments:</p> <p>The normal for loop actually doesn't fix this:</p> <pre><code>Scadenza.prototype.init = function() { this.promemoria = (this.promemoria == "")?("NO"):(this.promemoria); var gruppo = this.group; // convert array to string. this.group = ""; for (var i = 0; i &lt; gruppo.length; i++) { if (i != (gruppo.length - 1)) { this.group += gruppo[i] + ", "; } else { this.group += gruppo[i]; } } alert(this.group); }; </code></pre> <p>Alert is still the same.</p>
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    1. COpossible duplicate of [Why is using "for...in" with array iteration such a bad idea?](http://stackoverflow.com/questions/500504/why-is-using-for-in-with-array-iteration-such-a-bad-idea)
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    2. COIt doesn't work either with a normal for loop, thanks.
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    3. COIt does. Maybe you didn't fix all occurrences of `for in` loops… What does `this.group` contain? Maybe the `.toString()` methods of the items do it wrong as well.
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