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help on JScript built-in function please

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Posted by Nozshand   (5 posts)  [Biography] bio
Date Fri 26 Dec 2014 10:08 AM (UTC)

Amended on Fri 26 Dec 2014 10:09 AM (UTC) by Nozshand


I have noticed that some of the JScript functions listed on MSDN website is not supported in mushclient.

for example Array.indexOf

var a = ['red', 'blue', 'green', 'blue'];
var myFirstIndex = Array.indexOf(a, "blue");

always return "Object doesn't support this property or method" error;

for...in loop also behaves weird, it does not return proper value from the array.

Just wondering if there is anyway to make those work in mushclient?
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Posted by Fiendish   USA  (1,775 posts)  [Biography] bio   Global Moderator
Date Reply #1 on Fri 26 Dec 2014 04:26 PM (UTC)

Amended on Fri 26 Dec 2014 04:28 PM (UTC) by Fiendish

From http://www.tutorialspoint.com/javascript/array_indexof.htm


This method is a JavaScript extension to the ECMA-262 standard; as such it may not be present in other implementations of the standard. To make it work you need to add following code at the top of your script:

if (!Array.prototype.indexOf)
  Array.prototype.indexOf = function(elt /*, from*/)
    var len = this.length;

    var from = Number(arguments[1]) || 0;
    from = (from < 0)
         ? Math.ceil(from)
         : Math.floor(from);
    if (from < 0)
      from += len;

    for (; from < len; from++)
      if (from in this &&
          this[from] === elt)
        return from;
    return -1;

JScript is one of those "other implementations".

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