Undefined error when accessing 2-D array contents

[manutd7]

Hi,

Every time I try to access the contents of the following array it returns that it is undefined. I have tried multiple variations on accessing the arrays syntax wise but get different errors every time.

When I try to do it the way listed below I get the undefined error I talked about before.

Code:

    var array = new Array();
    var i, j, txt;
    var str = new Array();
 
    try{
        array = document.tsv.read_in("u:\\test.txt");
        for(i=0;i<array.length;i++)
            str[i]=array[i];
        for(i=0; i<array.length; i++)
            array[i] = new Array();
    }
    catch(err)
    {
        txt="There was an error on this page.\n\n";
        txt+="Error description: " + err.description + "\n\n";
        txt+=err.stacktrace + "\n\n";
        txt+=err.stack + "\n\n";
        txt+="Click OK to continue.\n\n";
        alert(txt);
    }
 
    for(i=0; i<array.length; i++)
    {
        var str2 = str[i];
        var temp = str2.split("\t");
        for(j=0;j<temp.length;j++)
        {
            array[i][j] = temp[j];
        }
        document.write(array[0][0]);
    }
 
    for (i=1;i<array.length; i++)
    {
        document.write("<div class=\"silverheader\" id=\""+i+"\"><a href="+i+">"+array[i][0]+"</a></div>");
        document.write("<div class=\"submenu\">");
        for(j=0;j<temp.length;j++)
            document.write(array[i][j]+"\t");
        document.write("</div>");
    }

I realize the code above is ridiculously inefficient but I'm just trying to figure out what I'm doing wrong. Any suggestions?

[Dormilich]

line #6, you’re overwriting your array variable.

[manutd7]

@Dormilich
That's my initializing line, the array has nothing in its contents before that point.

[Dormilich]

that doesn’t matter. whatever it has been before, after line #6 it’s something different.

[manutd7]

Yea, that's what I was going for cause that's when the contents of the array are first filled. I should have probably said this in the first post but during my debugging attempts I accessed the contents of the array after line 6, and I got the correct output - that is the contents that I brought in with the read_in function. When I try and access the contents in line 30 I get undefined for all index values. So I doubt that line 6 is where my problem is.

[Dormilich]

do you have a test page, where I can look for myself?

[gits]

simplyfied it a bit to test in firebug-console -> basically it seems to work:

var my_array = [];
var str      = [];
var i, j, txt;
 
 
my_array = ['foo\t8\tbar', 'foo','foo','foo','foo','foo'];
 
for (i = 0; i < my_array.length; i++) {
    str[i]   = my_array[i];
    my_array[i] = [];
}
 
for(i = 0; i < my_array.length; i++) {
    var str2 = str[i];
    var temp = str2.split("\t");
 
    for(j = 0; j < temp.length; j++) {
        console.log(temp[j]);
 
        my_array[i][j] = temp[j];
 
        console.log(my_array[i][j]);
    }
}
 
console.log(my_array);
 

how does the array initially look like?

[manutd7]

gits,

I have attached the result of the code that you pasted above which still gives me the same "undefined" response when I try to access the 2-d array. Initially, the array consists of a line from a tsv file that is parsed in using the java read_in function that I created.

If I try to access the array using the syntax "array[i,j]" I get the problem where each interation of the outer for loop overwrites the same row of the 2-d array. Basically at the end I have a 2-d array that has the same info throughout. Anybody have any answers to why I'm having these problems?

[gits]

what the code ... in fact yours ... produce is the following for my_array:

[["foo", "8", "bar"], ["foo"], ["foo"], ["foo"], ["foo"], ["foo"]]

is that what you expect?

since you use temp which has the las split operation's result assigned at this time there might be undefined values since temp might have had different lengths ...

[manutd7]

Yea that's the output I expect but unfortunately don't get. The temp arrays all have the same length as I'm inputting from a tsv file that has the same number of columns for the entire document.

Could it be a problem with the way my compiler or javascript settings on my browser? Cause if it works for you guys then there shouldn't be a reason why it doesn't work for me.