Solved

Compare array values from multidimensional array

Posted on 2014-11-21
5
550 Views
Last Modified: 2014-11-24
I currently have a multidimensional array and I want to compare the values from the second date against the values from the first date:
Array
(
    [Jan 01, 2013] => Array
        (
            [COM] => 1.1
            [RES] => 1.0
        )

    [Oct 28, 2014] => Array
        (
            [COM] => 1.5
            [RES] => 1.0
        )
)

Open in new window

For example, for the [COM] key I see that the value of 1.5 is greater than the prior value of 1.1, but for the [RES] key the value of 1.0 is equal to the prior value for that same key.

What would be the best way to accomplish this?  Thanks.
0
Comment
Question by:DanielAttard
  • 3
5 Comments
 
LVL 8

Expert Comment

by:Ahmed Merghani
ID: 40458447
Your result can be an array with the compared keys. And the possible values can be 1 , 0, -1.
date1[key] > date2[key] => 1
date1[key] = date2[key] => 0
date1[key] < date2[key] => -1
For example as your array, the result cam be like this:
Array
        (
            [COM] => -1
            [RES] => 0
        )

Open in new window

0
 
LVL 108

Expert Comment

by:Ray Paseur
ID: 40458781
It would probably be good if you could tell us what you want for output, right?  And are there always only two array elements in the main array?
0
 
LVL 108

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 40458800
Maybe something like this:
http://iconoun.com/demo/temp_daniel_attard.php

<?php // demo/temp_daniel_attard.php
error_reporting(E_ALL);
echo '<pre>';

/**
Array
(
    [Jan 01, 2013] => Array
        (
            [COM] => 1.1
            [RES] => 1.0
        )

    [Oct 28, 2014] => Array
        (
            [COM] => 1.5
            [RES] => 1.0
        )
)
*/

// CREATE THE TEST DATA
$arr = array
( 'Jan 01, 2013' => Array( 'COM' => 1.1, 'RES' => 1.0 )
, 'Oct 28, 2014' => Array( 'COM' => 1.5, 'RES' => 1.0 )
)
;

// CHECK - DOES IT LOOK RIGHT?  YES
print_r($arr);

// GET A LIST OF THE ARRAY KEYS IN THE MAIN ARRAY
$keys = array_keys($arr);
var_dump($keys);

// ISOLATE THE VALUES IN THE SUB-ARRAYS WITH THIS NOTATION
var_dump($arr[$keys[0]]);
var_dump($arr[$keys[0]]['COM']);
var_dump($arr[$keys[1]]['COM']);

// MAKE A COMPARISON AND SHOW THE RESULTS
if ( $arr[$keys[0]]['COM'] < $arr[$keys[1]]['COM'] ) echo PHP_EOL . "{$keys[0]} HAS VALUE {$arr[$keys[0]]['COM']} THAT IS LESS THAN THE VALUE OF {$arr[$keys[1]]['COM']} IN {$keys[1]}";

Open in new window

0
 

Author Closing Comment

by:DanielAttard
ID: 40462088
Another great solve for @Ray Paseur.  Thanks for showing me the right example, at the right time.  I learned from what you gave me and solved my issue.  Thanks.
0
 
LVL 108

Expert Comment

by:Ray Paseur
ID: 40462673
Thanks for the points - it's a great question! ~Ray
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Although it can be difficult to imagine, someday your child will have a career of his or her own. He or she will likely start a family, buy a home and start having their own children. So, while being a kid is still extremely important, it’s also …
Get to know the ins and outs of building a web-based ERP system for your enterprise. Development timeline, technology, and costs outlined.
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now