Nested array for loop

Question

I'm stuck trying to figure out how to loop trough nested arrays.

I have an array called worldShapes that contains child arrays. I want to loop trough the parent array and get all the child arrays from it.

Here's my attempt:

//Nested array
worldShapes = [
[33,108,66,141,99,174,99,207,132,207,165,207,165,240],
[132,306,165,306,165,339,165,372,132,405,99,405,99,438,132,438,165,438],
[198,339,231,339,264,372,297,372,330,405,363,438,396,438],
[198,174,198,273,231,306,264,306],
[231,174,231,240,264,273,297,273],
[396,306,462,306,495,339,495,372,528,405,528,438,561,438,594,471],
[660,504,561,504,495,504]
];
//trying to loop trough each item in the child array
(function(){
 var wShapes = worldShapes; //create a local variable
 var wLen = wShapes.length; //store the length as a variable
 for (var i = 0; i < wLen; i++) {
 for (var j = 0; j < wShapes[i].length; j++){
 console.log(wShapes[i][j]); //this is propably wrong, trying to access the current child item of the current parent array 
 }
 }
 })

• thefourtheye: What is the expected output?
• leesei: What's wrong with your code? Did you tried to run it?
• user2625787: You've wrapped it in a function, but you don't execute the function. But why wrap it in a function at all?
• lurker: Are you getting an error message with that code?
• Matt Patenaude: Your code looks absolutely correct. What is it not doing that you think it should be?

Answer 1

Just add (); to the very end of your code ;-)

You've simply forgotten to invoke your anonymous function

Answer 2

To execute the function, add ()

(function () {
 var wShapes = worldShapes; //create a local variable
 var wLen = wShapes.length; //store the length as a variable
 for (var i = 0; i < wLen; i++) {
 for (var j = 0; j < wShapes[i].length; j++) {
 console.log(wShapes[i][j]); //this is propably wrong, trying to access the current child item of the current parent array 
 }
 }
}()); // here

Fiddle