manseh1

is there any easy way to exchange 2 variables' value in JavaScript?

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any-easy-way-to-exchange-2-variables-value-in-js

On 13 Nov 2006, at 10:51, Kim Han Shin wrote:

> is there any easy way to exchange 2 variables' value in JavaScript?

Leaving aside the obvious temp variable approach, when I was young 

and computers had not very much memory at all, this one had a certain 

nick rothwell -- composition, systems, performance -- 

Leaving aside the obvious temp variable approach, when I was young  
and computers had not very much memory at all, this one had a certain  
cachet:

   nick rothwell -- composition, systems, performance -- http:// 
www.cassiel.com


Well sorry if i'm stating the obvious but using a 3rd variable would work. If you do not want to use a third one,

Hmm, I have no idea about the speed comparisons between programming languages, but as far as I know, ability to call for swapping two variables in a single line does not necessarily mean that it is going to be interperetad and executed faster. It's just the way you tell things to compiler/interpreter, and does not give clues about speed I think. Single line of swapping code could take longer or shorter to execute. Speed is not releated to that.

It takes longer to write that code anyways. If that is the issue.

On 13-Nov-2006, at 17:32, Kim Han Shin wrote:

> i know it works but using tuple type in python is more simple and 

Over and above Batuhan's very correct point, it is worth mentioning 

that Python, JS, and even message-passing in plain-vanilla Max have 

far, far more overhead than any of the code snippets listed in this 

Nick's catchy code disassembles on PPC to

and the more standard swap-with-temp-var disassembles to

Either way it's very few cycles, your Python code will not be faster 

than that. Sending a message through a patch cord is many times the 

If it's typing and transparency you're concerned about, write a Swap 

Peter Castine +--> Litter Power & Litter Bundle for Jitter

Interface Building for |home | chez nous|

Max/MSP Extremely cool |bei uns | i nostri|

> i know it works but using tuple type in python is more simple and  
> elegant: just one step.

Over and above Batuhan's very correct point, it is worth mentioning  
that Python, JS, and even message-passing in plain-vanilla Max have  
far, far more overhead than any of the code snippets listed in this  
thread.

	xor        r30,r30,r29
	xor        r29,r30,r29
	xor        r30,r30,r29

	mr         r28,r30
	mr         r30,r29
	mr         r29,r28

Either way it's very few cycles, your Python code will not be faster  
than that. Sending a message through a patch cord is many times the  
number of cycles.

If it's typing and transparency you're concerned about, write a Swap  
method/function.

--------------    http://www.bek.no/~pcastine/Litter/    -------------
Peter Castine             +--> Litter Power & Litter Bundle for Jitter
                                Universal Binaries on the way
iCE:  Sequencing,  Recording &
       Interface  Building  for                   |home    | chez nous|
       Max/MSP   Extremely cool                   |bei uns |  i nostri|
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any easy way to exchange 2 variables' value in JS