UberFoX at 23:35, 21 June 2015

2015-06-21T23:35:56Z

← Older revision		Revision as of 23:35, 21 June 2015
Line 5:		Line 5:
	=== Description ===		=== Description ===

−	Filters an array based on a ~~predicate~~	+	Filters an array based on a query and returns all matching.

	=== Parameters ===		=== Parameters ===

UberFoX: 2 revisions

2015-06-14T12:37:49Z

2 revisions

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Revision as of 12:37, 14 June 2015

UberFoX: /* Example */

2014-12-12T11:23:50Z

Example

← Older revision		Revision as of 11:23, 12 December 2014
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	<syntaxhighlight lang="sputnik">		<syntaxhighlight lang="sputnik">
		+	// Define a Person class
		+	Class Person
		+	{
		+	my $Name;
		+	my $Age;
		+	Function __Construct($Name, $Age)
		+	{
		+	$this->$Name = $Name;
		+	$this->$Age = $Age;
		+	}
		+	};
	// Create an array of them		// Create an array of them
	$people = array( // Each one has a different name and age		$people = array( // Each one has a different name and age

UberFoX: 1 revision

2014-08-11T21:41:09Z

1 revision

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Revision as of 21:41, 11 August 2014

UberFoX: Created page with "

 Where( ,  )

=== Description === Filters an array based on a predicate === Parameters === ==== array ==== The array to use. ==== query ==== A que..."

2014-08-09T17:54:59Z

Created page with "<pre> Where( <array>, <query> ) </pre> === Description === Filters an array based on a predicate === Parameters === ==== array ==== The array to use. ==== query ==== A que..."

New page

<pre>
Where( <array>, <query> )
</pre>

=== Description ===

Filters an array based on a predicate

=== Parameters ===

==== array ====

The array to use.

==== query ====

A query to test each element for a condition

=== Return Value ===

Success: An Array that contains elements from the input sequence that satisfy the condition

Failure: Returns null.

=== Remarks ===

None.

=== Example ===

Return all items from an array that are below 3 in length

<syntaxhighlight lang="sputnik">
$a = array("One", "Two", "Three", "Four");
foreach($a->>Where($v => StrLen($v) < 4) as $i)
{
say $i;
}
// Prints
// One
// Two
</syntaxhighlight>

Return all items from an array that are below 3 in length and starts with the letter T

<syntaxhighlight lang="sputnik">
$a = array("One", "Two", "Three", "Four");
foreach($a->>Where($v => StrLen($v) < 4 && StartsWith($v, 'T')) as $i)
{
say $i;
}
// Prints
// Two
</syntaxhighlight>

Return all items from an array that contains class objects and filter it so only ones with a certain value range are returned

<syntaxhighlight lang="sputnik">
// Create an array of them
$people = array( // Each one has a different name and age
new Person("Tom", 23),
new Person("James", 17),
new Person("Charles", 19),
new Person("Mike", 27),
new Person("Steve", 25)
);
// Using Where() we will loop through and find the ones we want
// Lets find all the people who are under 25
foreach($people->>Where($p => $p->$Age < 25) as $person)
{
printf("Name %s | Age %d\n", $person->$Name, $person->$Age);
}
// Prints
// Name Tom | Age 23
// Name James | Age 17
// Name Charles | Age 19
</syntaxhighlight>

Same as above but with an extra check

<syntaxhighlight lang="sputnik">
// Define a Person class
Class Person
{
my $Name;
my $Age;
Function __Construct($Name, $Age)
{
$this->$Name = $Name;
$this->$Age = $Age;
}
};
// Create an array of them
$people = array( // Each one has a different name and age
new Person("Tom", 23),
new Person("James", 17),
new Person("Charles", 19),
new Person("Mike", 27),
new Person("Steve", 25)
);
// Using Where() we will loop through and find the ones we want
// Lets find all the people who are under 25 but not younger than 18
foreach($people->>Where($p => $p->$Age < 25 && $p->$Age > 18) as $person)
{
printf("Name %s | Age %d\n", $person->$Name, $person->$Age);
}
// Prints
// Name Tom | Age 23
// Name Charles | Age 19
</syntaxhighlight>

Same as above but with some changes

<syntaxhighlight lang="sputnik">
// Define a Person class
Class Person
{
my $Name;
my $Age;
Function __Construct($Name, $Age)
{
$this->$Name = $Name;
$this->$Age = $Age;
}
};
// Create an array of them
$people = array( // Each one has a different name and age
new Person("Tom", 23),
new Person("James", 17),
new Person("Charles", 19),
new Person("Toby", 14),
new Person("Mike", 27),
new Person("Steve", 25)
);
// Using Where() we will loop through and find the ones we want
// Lets find all the people who are under 25 but not younger than 18
foreach($people->>Where($p => $p->$Age < 25 && StartsWith($p->$Name, 'T')) as $person)
{
printf("Name %s | Age %d\n", $person->$Name, $person->$Age);
}
// Prints
// Name Tom | Age 23
// Name Toby | Age 14
</syntaxhighlight>

[[Category:Core Function]]

Core Function Where - Revision history

UberFoX at 23:35, 21 June 2015

UberFoX: 2 revisions

UberFoX: /* Example */

UberFoX: 1 revision

UberFoX: Created page with "
Where( , )
=== Description === Filters an array based on a predicate === Parameters === ==== array ==== The array to use. ==== query ==== A que..."