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Associative Array (PHP and Corel Paradox Cross Reference Guide)

By Mike Prestwood

PHP versus Corel Paradox: A side by side comparison between PHP and Corel Paradox.

Data Structures

Data structures allow you to store and work with data. Common data structures include arrays, associative arrays, etc.

Associative Array

[Other Languages]

A set of unique keys linked to a set of values. Each unique key is associated with a value. Think of it as a two column table. MyArray['CA'] = 'California' MyArray['AR'] = 'Arizona'

Languages Focus

Associative arrays are also known as a dictionary or a hash table in other languages.

PHP:

Declare associative array with initial known values. You can also add to associative array. (You can just assign values without ever declaring it too!)

Syntax Example:

$prices = array( 'Tires'=>100, 'Spark Plugs'=>4 );
$prices['Oil'] = 10;

echo "Tires=" . $prices['Tires'] . "<br>";
echo "Oil=" . $prices['Oil'] . "<br>";

PHP Associative Array

Corel Paradox: DynArray

In ObjectPAL associative arrays are known as dynamic arrays.

Syntax Example:

var
  myDynArray   DynArray[] String
endVar

myDynArray["Last_Name"] = "Spitz"
myDynArray["First_Name"] = "Randy"

myDynArray.view()

ObjectPAL Associative Array (DynArray)