jQuery-JS appending from multidimensional arrays with loops

Question

apparently I can't understand how JS's logic works when parsing data from multidimensional arrays.

let's say we have a 3D array as this:

 var data = new Array(("1","2",("7","8","9")),("3","4",("10","11","12")),("5","6",("13","14","15")));

and I have a simple HTML structure to start with like a single div with id=parentdiv

and i want to append it in the DOM in order to look like every dimension is in a different div but still child to the div of the previous dimention ending up in something like: childdiv1:( 1 2 grandchilddiv1.1: 7 grandchilddiv1.2: 8 grandchilddiv1.3: 9) childdiv2:( 3 4 grandchilddiv2.1: 10 grandchilddiv2.2: 11 grandchilddiv2.3: 12) childdiv3:( 5 6 grandchilddiv3.1: 13 grandchilddiv3.2: 14 grandchilddiv3.3: 15) ending up printing a simple 1 2 7 8 9 3 4 10 11 12 5 6 13 14 15

setting up a fiddle to check how loops work.. http://jsfiddle.net/M_Elf/68zfgdaq/1/ Using $each instead of for ofcourse doesn't change anything what I noticed is that each loop is acting like independently from its parent loops... Never seen examples parsing data from more than 2 dimensions and a loop inside a loop doesn't seem to work as I predicted... Any suggestions?

solved with recursion way of thinking

jered · Accepted Answer · 2015-05-27 08:36:54Z

1

I don't think you're using the Array() constructor properly. It's a bit unconventional to use that constructor rather than just var arr = [1, 2, 3];

The problem is that the Array() constructor expects each argument to be a single value or object; instead you're trying to feed it multidimensional arrays, but you aren't constructing those inner arrays properly! It should probably look something like this:

var data = new Array(new Array(1, 2, 3), new Array(4, 5, 6), new Array(7, 8, 9));

An easier and more intuitive way to do it would be to just declare the array like this:

var data = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];

It makes it easier to see how the arrays nest and what the multidimensional structure is.

answered May 27, 2015 at 8:36

jered

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5 Comments

CookieMonster Over a year ago

by transforming the array into a form like` "var data = [[1, 2, [7, 8, 9]], [3, 4, [10, 11, 12]], [5, 6, [13, 14, 15]]];" ` then I guess the syntax should also change? JQuery says there are "parameter is not of type 'Node'" errors

jered Over a year ago

This is a classic recursion problem. Take a gander at this fiddle: jsfiddle.net/belross/h54u2w58

CookieMonster Over a year ago

recursion! exactly what i needed!

CookieMonster Over a year ago

what if i wanted to put elements 7 8 9, 10 11 12 and 13 14 15 in 3 separate lists? inside a parent div?

jered Over a year ago

@CookieMonster I'm not sure what you mean, but if you restructure the array you can achieve any nested order of elements that you want.

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