JavaScript variable not is undefined in IE9

Question

Hello I have next JS code (this code not my own)

 function somename(f) 
    var procName = "";
    var procParams = new Array();
    var parseEl = "";
    var parseEls = new Array();
    var parseInd = 0;
    var procParamsInd = 0;
    var IsValRead = false;
    for (i = 0; i < f.length; i++) {
        if (f[i] == "(")
            break;
        else
            procName = procName + f[i];
    }

}

I will redo it to much better way to find data before "(", but i wounder why procName variable is always undefined in IE9 in all browsers all working well.

procName is undefined in for loop. and result is like undefinedundefinedundefinedundefined — a3code
– a3code, Commented May 18, 2012 at 12:54
I have a vague recollection that at least some versions of IE do not support indexing to access string characters. Try using charAt instead; or a better algorithm. It is almost certainly the f[x] which is causing your undefined's. — HBP
– HBP, Commented May 18, 2012 at 13:54

HBP · Accepted Answer · 2012-05-18 14:11:41Z

1

I have a vague recollection that at least some versions of IE do not support indexing to access string characters. Try using charAt instead; or a better algorithm. It is almost certainly the f[x] which is causing your undefined's.

answered May 18, 2012 at 14:11

HBP

16.1k6 gold badges30 silver badges34 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Joseph · Accepted Answer · 2012-05-18 12:47:56Z

1

A better way to get the substring before ( is this:

var f = "name(2,4,5)",
    procName = f.slice(0, f.indexOf('(')); //slice from start until before "("

console.log(procName); //name

answered May 18, 2012 at 12:47

Joseph

120k31 gold badges186 silver badges238 bronze badges

1 Comment

a3code Over a year ago

Thanks this is nice. but question was about why procName is undefined in for.

Collectives™ on Stack Overflow

JavaScript variable not is undefined in IE9

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related