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Re: Need help accessing the key array. [message #185445 is a reply to message #185429] Mon, 31 March 2014 11:35 Go to previous messageGo to previous message
Jerry Stuckle is currently offline  Jerry Stuckle
Messages: 2598
Registered: September 2010
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Senior Member
On 3/30/2014 11:15 PM, Kevin Burton wrote:
> On Sunday, March 30, 2014 6:55:22 PM UTC-5, Jerry Stuckle wrote:
>> On 3/30/2014 6:40 PM, Kevin Burton wrote:
>>
>>> On Saturday, March 29, 2014 3:49:37 PM UTC-5, Kongthap Thammachat wrote:
>>
>>>> <?php
>>
>>>>
>>
>>>>
>>
>>>>
>>
>>>> $rates = array(
>>
>>>>
>>
>>>> array("animal" => 0, "color" => 0, "rate" => 5),
>>
>>>>
>>
>>>> array("animal" => 0, "color" => 1, "rate" => 10),
>>
>>>>
>>
>>>> array("animal" => 0, "color" => 2, "rate" => 15),
>>
>>>>
>>
>>>> array("animal" => 1, "color" => 0, "rate" => 20),
>>
>>>>
>>
>>>> array("animal" => 1, "color" => 1, "rate" => 25),
>>
>>>>
>>
>>>> array("animal" => 1, "color" => 2, "rate" => 30),
>>
>>>>
>>
>>>> array("animal" => 2, "color" => 0, "rate" => 35),
>>
>>>>
>>
>>>> array("animal" => 2, "color" => 1, "rate" => 40),
>>
>>>>
>>
>>>> array("animal" => 2, "color" => 2, "rate" => 45),
>>
>>>>
>>
>>>> array("animal" => 3, "color" => 0, "rate" => 50),
>>
>>>>
>>
>>>> array("animal" => 3, "color" => 1, "rate" => 55),
>>
>>>>
>>
>>>> array("animal" => 3, "color" => 2, "rate" => 60)
>>
>>>>
>>
>>>> );
>>
>>>>
>>
>>>>
>>
>>>>
>>
>>>> $input_animal = 1;
>>
>>>>
>>
>>>> $input_color = 2;
>>
>>>>
>>
>>>>
>>
>>>>
>>
>>>> ?>
>>
>>>>
>>
>>>>
>>
>>>>
>>
>>>> How to access the $rates array to echo the associated rate of "animal" => 1 and "color" => 2 ? (which is 30), should i re-designed the $rates array?
>>
>>>>
>>
>>>>
>>
>>>>
>>
>>>> Thanks
>>
>>>
>>
>>> I don't think there is a way to reference the array as I understand you want to (at least I don't know of a way). But perhaps the following classes will give you the results that you desire:
>>
>>>
>>
>>> class FilterClass {
>>
>>> private $input;
>>
>>> private $filter;
>>
>>> function __construct($filter, $input) {
>>
>>> $this->filter = $filter;
>>
>>> $this->input = $input;
>>
>>> }
>>
>>> function FilteredArray() {
>>
>>> return array_filter($this->input, function($val) {
>>
>>> $matched = false;
>>
>>> foreach(array_keys($this->filter) as $filter_key) {
>>
>>> if($val[$filter_key] == $this->filter[$filter_key]) {
>>
>>> $matched = true;
>>
>>> } else {
>>
>>> $matched = false;
>>
>>> break;
>>
>>> }
>>
>>> }
>>
>>> return $matched;
>>
>>> });
>>
>>> }
>>
>>> };
>>
>>>
>>
>>> class ReduceClass {
>>
>>> private $input;
>>
>>> private $filter;
>>
>>> function __construct($filter, $input) {
>>
>>> $this->filter = $filter;
>>
>>> $this->input = $input;
>>
>>> }
>>
>>> function ReducedArray() {
>>
>>> return array_reduce($this->input, function($acc, $val) {
>>
>>> $matched = false;
>>
>>> foreach(array_keys($this->filter) as $filter_key) {
>>
>>> if($val[$filter_key] == $this->filter[$filter_key]) {
>>
>>> $matched = true;
>>
>>> } else {
>>
>>> $matched = false;
>>
>>> break;
>>
>>> }
>>
>>> }
>>
>>> if($matched) {
>>
>>> array_push($acc, $val);
>>
>>> }
>>
>>> return $acc;
>>
>>> }, array());
>>
>>> }
>>
>>> };
>>
>>>
>>
>>>
>>
>>> $rates = array(
>>
>>> array("animal" => 0, "color" => 0, "rate" => 5),
>>
>>> array("animal" => 0, "color" => 1, "rate" => 10),
>>
>>> array("animal" => 0, "color" => 2, "rate" => 15),
>>
>>> array("animal" => 1, "color" => 0, "rate" => 20),
>>
>>> array("animal" => 1, "color" => 1, "rate" => 25),
>>
>>> array("animal" => 1, "color" => 2, "rate" => 30),
>>
>>> array("animal" => 2, "color" => 0, "rate" => 35),
>>
>>> array("animal" => 2, "color" => 1, "rate" => 40),
>>
>>> array("animal" => 2, "color" => 2, "rate" => 45),
>>
>>> array("animal" => 3, "color" => 0, "rate" => 50),
>>
>>> array("animal" => 3, "color" => 1, "rate" => 55),
>>
>>> array("animal" => 3, "color" => 2, "rate" => 60)
>>
>>> );
>>
>>> $fc = new FilterClass(array("animal" => 1, "color" => 2), $rates);
>>
>>> $filtered_array = $fc->FilteredArray();
>>
>>> var_dump($filtered_array);
>>
>>>
>>
>>> Or
>>
>>>
>>
>>> $rates = array(
>>
>>> array("animal" => 0, "color" => 0, "rate" => 5),
>>
>>> array("animal" => 0, "color" => 1, "rate" => 10),
>>
>>> array("animal" => 0, "color" => 2, "rate" => 15),
>>
>>> array("animal" => 1, "color" => 0, "rate" => 20),
>>
>>> array("animal" => 1, "color" => 1, "rate" => 25),
>>
>>> array("animal" => 1, "color" => 2, "rate" => 30),
>>
>>> array("animal" => 2, "color" => 0, "rate" => 35),
>>
>>> array("animal" => 2, "color" => 1, "rate" => 40),
>>
>>> array("animal" => 2, "color" => 2, "rate" => 45),
>>
>>> array("animal" => 3, "color" => 0, "rate" => 50),
>>
>>> array("animal" => 3, "color" => 1, "rate" => 55),
>>
>>> array("animal" => 3, "color" => 2, "rate" => 60)
>>
>>> );
>>
>>> $fc = new ReduceClass(array("animal" => 1, "color" => 2), $rates);
>>
>>> $filtered_array = $fc->ReducedArray();
>>
>>> var_dump($filtered_array);
>>
>>>
>>
>>
>>
>> A decent idea, but much harder than it needs to be. A simple two
>>
>> dimensional array suffices for what he needs. See the other updates in
>>
>> this thread.
>>
>>
>
> In order for a 2D array to work you have to change the input array and the input parameters. Right?
>

Nope. Just make the array itself two dimensional. A lot easier than
all of your code (and a lot fewer changes, also).

--
==================
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Jerry Stuckle
jstucklex(at)attglobal(dot)net
==================
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