Javascript string to 2 dimensional array

Question

Ok i'v been trying many deferent things to get this to work.

I need a string separated by commas into a 2 dimensional array... like this for example:

string = "a,b,c,d,e,1,2,3,4,5";
array = [['a','1'],['b','2'],['c','3'],['d','4'],['e','5']];

This is the code I have been tweaking.

var temp = list.split(',');
questions = [[''],[''],[''],[''],['']];
five = 0;
one = 0;
for(var i = 0; i < temp.length; i++) {
    if(one == 5){five++; one = 0;}
    one++;
    questions[one][five] = temp[i];
}

btw list = "a,b,c,d,e,1,2,3,4,5".

Thank's in advance!!!

David Thomas · Accepted Answer · 2012-09-23 22:51:14Z

1

I'd suggest a slightly different approach, that avoids the (to my mind overly-) complex internals of the for loop:

var string = "a,b,c,d,e,1,2,3,4,5",
    temp = string.split(','),
    midpoint = Math.floor(temp.length/2),
    output = [];

for (var i=0, len=midpoint; i<len; i++){
    output.push([temp[i], temp[midpoint]]);
    midpoint++;
}

console.log(output);

JS Fiddle demo.

edited Sep 23, 2012 at 22:51

answered Sep 23, 2012 at 22:44

David Thomas

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3 Comments

Stephen Over a year ago

This look's good but i intend to add more to that string by fives(the amount of fives will increase)... But thank's anyway i might use some of this.

David Thomas Over a year ago

So what would the string look like, and what would you want the result to be? (I ask more out of curiosity, and because I'm curious as to the challenge, than any other reason.)

Stephen Over a year ago

The string could be any size because the program let's you create it. So someone could add as many as they want but it always comes in fives.

Stephen · Accepted Answer · 2012-09-24 15:20:47Z

1

OK so i fixed it before i asked the question... but i did so much work i'll post it anyway.

This is the code i have now that works:

    var temp = list.split(',');

questions = [[],[],[],[],[]];

for(var i = 0; i < temp.length; i++) {
    questions[i%5][Math.floor(i/5)] = temp[i];
    one++;
}

Thank You Barmar!!!

edited Sep 24, 2012 at 15:20

answered Sep 23, 2012 at 22:35

Stephen

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2 Comments

Barmar Over a year ago

You don't need 3 variables. questions[Math.floor(i/5)][i%5] = temp[i];

Stephen Over a year ago

Thank You i started trying to do something like this but i couldn't get it right it works great!

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