[array_flip_9] at tagSwap.net: Open Source Lasso Code

[array_flip_9]

Description

Link: [array_flip_9]

Author: Jonathan Guthrie

Category: Array

Version: 9.x

License: Public Domain

Posted: Nov. 05, 2010

Updated: May. 17, 2012

More by this author...

Lazy way to reverse the order of key/value pairs in a pair array.

NOTE: This is a Lasso 9 port of Jason Huck's array_flip

http://tagswap.net/array_flip

Also included is a method that extends the Lasso 9 array type, adding ->flip as a member tag. Thanks to Jolle Carlestam for the inspiration :)

Parameters

none

Sample Usage

var(unflipped = array( 
    'a' = 1, 
    'b' = 2, 
    'c' = 3 
	)
)
 
var(flipped = array_flip($unflipped)) 

'unflipped: '		+ $unflipped
'flipped: '		+ $flipped
'l9 method flipped: '	+ $flipped->flip &

Source Code

Click the "Download" button below to retrieve a copy of this tag, including the complete documentation and sample usage shown on this page. Place the downloaded ".inc" file in your LassoStartup folder, restart Lasso, and you can begin using this tag immediately.

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define array_flip(in) => {
	// Returns the given pair array with the keys and values inverted.
    local(out = array) 
	with i in #in 
	where #i->isA('pair')
	do => { 
		#out->insert(#i->second = #i->first)
	}
	return #out
}

// OR

define array->flip() => {
	loop(.size) => {
		if(.get(loop_count)->isa('pair')) => {
			.get(loop_count) = pair(.get(loop_count)->second = .get(loop_count)->first)
		}
	}
}

Related Tags

[array_flip]

Comments