How to save values with loop

Question

I am trying to add the returned value from the test() function into a variable result, but += does not seem to work. I get the error "invalid variable initialization". I also tried replacing i++ to i+= which didnt work either. Maybe I'm totally wrong and should use a while loop instead? I'm quite lost..

I want 'result' to look something like this:

var result = no no no 0no 0no no;

etc (with no whitespace, of course).

Any help much appreciated! Thanks

function test(no){

            if (no <= 15){              
                return '0' + parseInt(no);
            }

            else {              
                return parseInt(no); 
            }       
}


        for(i = 0; i < pics.length; i++){

            var b = pics[i].value;

            var result += test(b);

        }

Given the syntax and variable names, I'm assuming JavaScript and have retagged as such. ActionScript (or any other ECMAScript-based language) is another likely choice, but they have identical syntaxes in this example. — Cory Petosky
– Cory Petosky, Commented Nov 18, 2009 at 19:29

GManNickG · Accepted Answer · 2009-11-18 19:26:10Z

5

Every time your loop starts, var result goes away. You need to move it outside the loop:

var result = ''; // lives outside loop
for(i = 0; i < pics.length; i++)
{
    var b = pics[i].value;
    result += test(b);
}

answered Nov 18, 2009 at 19:26

GManNickG

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1 Comment

Brienne Schroth Over a year ago

the result is a string, it should be initialized to '' not 0.

Peter · Accepted Answer · 2009-11-18 19:26:13Z

0

you need to initialize result as a string not as a var.

e.g.

outside the loop

string result = string.Empty;

for loop

result += test(b);

end for loop

answered Nov 18, 2009 at 19:26

Peter

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Comments

Philip Wallace · Accepted Answer · 2009-11-18 19:35:04Z

0

You are seeing that error because you are using the increment operator on a newly declared variable. Use '=':

for(i = 0; i < pics.length; i++)
{
   var b = pics[i].value;
   var result = test(b);
}

Although, as GMain pointed out, the real solution is to move the 'result' variable declaration outside of the for loop.

edited Nov 18, 2009 at 19:35

answered Nov 18, 2009 at 19:28

Philip Wallace

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4 Comments

Brienne Schroth Over a year ago

result is a cumulative concatenation of the results of test() on each element.

Philip Wallace Over a year ago

No need for the downvote. I explained the reason for his compile error.

Nosredna Over a year ago

Although you're right about why the interpreter is complaining, so I'll vote you up to zero.

Philip Wallace Over a year ago

oops - lol... I should remember that C# isn't the only language in existence! Thanks for the upvote...

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