Talk:IfElse - Revision history

Ccw at 16:22, 4 June 2009

2009-06-04T16:22:06Z

← Older revision		Revision as of 16:22, 4 June 2009
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	Finally I think the and-or-statement is still more effective that IfElse.		Finally I think the and-or-statement is still more effective that IfElse.
	[[User:NeonBlack\|NeonBlack]] 12:19, 4 June 2009 (CEST)		[[User:NeonBlack\|NeonBlack]] 12:19, 4 June 2009 (CEST)
			----
			Swapping the arguments is fine if you're sure what the values are when you write the code.
			For example, which one of these will not be false?
			<syntaxhighlight lang="lua">name = (whichPlayer) and getPlayerName(player1) or getPlayerName(player2)</syntaxhighlight>
			Also, as a crazy example, choosing between false and nil is impossible with and-or:
			<syntaxhighlight lang="lua">moo = (variable) and false or nil
			moo == always nil</syntaxhighlight>
			<syntaxhighlight lang="lua">moo = (variable) and nil or false
			moo == always false
			</syntaxhighlight>
			IfElse <3

			[[User:Ccw\|MrSmartArse]] 17:06, 4 June 2009 (CEST)
			----

NeonBlack at 10:19, 4 June 2009

2009-06-04T10:19:01Z

← Older revision		Revision as of 10:19, 4 June 2009
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	[[User:Flobu\|Flobu]] 11:43, 4 June 2009 (CEST)		[[User:Flobu\|Flobu]] 11:43, 4 June 2009 (CEST)
			----
			That's no real problem since the only values that make a condition fail are nil and false. You won't want to use any of them as a result if the condition is true.
			In this case you should just swap the ifTrue and ifFalse and negate the condition.
			<syntaxhighlight lang="lua">local moo = not true and true or false
			moo == false</syntaxhighlight>
			You would just have to remember that ifTrue must not be false or nil and that instead of that ifFalse can be false or nil.
			Finally I think the and-or-statement is still more effective that IfElse.
			[[User:NeonBlack\|NeonBlack]] 12:19, 4 June 2009 (CEST)

Flobu at 09:45, 4 June 2009

2009-06-04T09:45:36Z

← Older revision		Revision as of 09:45, 4 June 2009
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	[[User:Ccw\|MrSmartArse]] 08:46, 4 June 2009 (CEST)		[[User:Ccw\|MrSmartArse]] 08:46, 4 June 2009 (CEST)
	----		----

			it returns true because one of the two first arguments are false.

			this is lua's fault.

			[[User:Flobu\|Flobu]] 11:43, 4 June 2009 (CEST)

Ccw at 08:34, 4 June 2009

2009-06-04T08:34:49Z

← Older revision		Revision as of 08:34, 4 June 2009
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	ifFalse = true		ifFalse = true

	moo = (~~varible~~) ? ifTrue : ifFalse		moo = (variable) ? ifTrue : ifFalse
	== false		== false
	</syntaxhighlight>		</syntaxhighlight>
	ElseIf works fine here:		ElseIf works fine here:
	<syntaxhighlight lang="lua">		<syntaxhighlight lang="lua">
	moo = IfElse( ~~varible~~, ifTrue , ifFalse )		moo = IfElse( variable, ifTrue , ifFalse )
	== false		== false
	</syntaxhighlight>		</syntaxhighlight>

Ccw at 07:52, 4 June 2009

2009-06-04T07:52:34Z

← Older revision		Revision as of 07:52, 4 June 2009
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	<syntaxhighlight lang="lua">moo = ({ [true] = ifTrue, [false] = ifFalse })[condition]</syntaxhighlight>		<syntaxhighlight lang="lua">moo = ({ [true] = ifTrue, [false] = ifFalse })[condition]</syntaxhighlight>
	But your code is much better. Thanks for posting this. ;D [[User:NeonBlack\|NeonBlack]] 22:00, 18 May 2009 (CEST)		But your code is much better. Thanks for posting this. ;D [[User:NeonBlack\|NeonBlack]] 22:00, 18 May 2009 (CEST)

			----
			The problem with the plain Lua version is that 'ifTrue' is also part of the test condition.
			Consider this:
			<syntaxhighlight lang="lua">
			variable = true
			ifTrue = false
			ifFalse = true

			moo = (varible) ? ifTrue : ifFalse
			== false
			</syntaxhighlight>
			ElseIf works fine here:
			<syntaxhighlight lang="lua">
			moo = IfElse( varible, ifTrue , ifFalse )
			== false
			</syntaxhighlight>
			Lua's and's 'n' or's however may give unexpected results:
			<syntaxhighlight lang="lua">
			moo = (variable) and (ifTrue) or (ifFalse)
			moo == true
			</syntaxhighlight>

			[[User:Ccw\|MrSmartArse]] 08:46, 4 June 2009 (CEST)
			----

NeonBlack at 20:00, 18 May 2009

2009-05-18T20:00:01Z

← Older revision		Revision as of 20:00, 18 May 2009
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	in C++.		in C++.
			----
			oO You're right. Never thought of that. What I was thinking about, too, was something like
			<syntaxhighlight lang="lua">moo = ({ [true] = ifTrue, [false] = ifFalse })[condition]</syntaxhighlight>
			But your code is much better. Thanks for posting this. ;D [[User:NeonBlack\|NeonBlack]] 22:00, 18 May 2009 (CEST)

Talidan at 00:57, 17 May 2009

2009-05-17T00:57:57Z

← Older revision		Revision as of 00:57, 17 May 2009
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	There's ~~little~~ use for this, as far as i can tell. Lua supports this by its syntax sugars:		There's not really any use for this, as far as i can tell. Lua supports this by its syntax sugars:

	moo = (variable) and (ifTrue) or (ifFalse)		moo = (variable) and (ifTrue) or (ifFalse)

Talidan: New page: There's little use for this, as far as i can tell. Lua supports this by its syntax sugars: moo = (variable) and (ifTrue) or (ifFalse) works the same as moo = (varible) ? ifTrue : ifFa...

2009-05-17T00:55:32Z

New page: There's little use for this, as far as i can tell. Lua supports this by its syntax sugars: moo = (variable) and (ifTrue) or (ifFalse) works the same as moo = (varible) ? ifTrue : ifFa...

New page

There's little use for this, as far as i can tell. Lua supports this by its syntax sugars:

moo = (variable) and (ifTrue) or (ifFalse)

works the same as

moo = (varible) ? ifTrue : ifFalse

in C++.