Wednesday, October 19, 2011

Traversing Arrays

We just show what we will feel is the mainstream way of each language to traverse an array. Alternative hacks can be added in the comments section.

Our goal here is to walk an array made of numbers and output their indexes in such fashion:

  • 0 has 1
  • 1 has 2
  • 2 has 3

In PHP

In JavaScript

In Bash

In ActionScript

In Perl

In Python

In Java

In Ruby

Posted by fabjoa at 2:02 AM
Labels: , , , , , , , , , , , ,

4 comments:

  1. fabjoaOctober 19, 2011 at 2:10 AM

    Another way to do it in PHP:

    reset($_array);

    while(current($_array))
    {
    echo key($_array)," has ",current($_array);
    next($_array);
    }

    ReplyDelete
  2. fabjoaOctober 20, 2011 at 1:32 AM

    also in PHP:

    for( $i=0; $i<count($_array); $i++ )
    echo $i,' has ',$_array[$i];

    ReplyDelete
  3. fabjoaOctober 21, 2011 at 2:57 AM

    In JavaScript (ECMA only), you could also do:

    _array.forEach
    (
    function(item,key)
    {
    document.writeln(key+' has '+item)
    }
    )

    https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/forEach

    ReplyDelete
  4. fabjoaOctober 22, 2011 at 4:01 AM

    In JavaScript, you can also use jQuery:

    $.each(_array,function(index,item){
    document.writeln(index+' has '+item) } )

    ReplyDelete

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