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#180118 - 2007-09-04 01:50 AM If vs select
samd samd Fresh Scripter Registered: 2002-12-03 Posts: 19	Can someone please give me some insite as to when an IF statement is better/worse than a SELECT statement. I know there is no right or wrong but is there a proper place for either vs the other?
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#180119 - 2007-09-04 02:43 AM Re: If vs select [Re: samd]
Gargoyle Gargoyle MM club member Registered: 2004-03-09 Posts: 1597 Loc: Valley of the Sun (Arizona, US...	Speaking as a non expert in the subject... Select allows you to react upon more than a single evaluation of a "case". If allows you to react upon only one evaluation of a "case" If is great for a Y/N scenario Select is better for a Y/N/M/I scenario Yes No Maybe I Don't Know _________________________ Today is the tomorrow you worried about yesterday.
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#180120 - 2007-09-04 03:40 AM Re: If vs select [Re: Gargoyle]
Shawn Shawn Administrator Registered: 1999-08-13 Posts: 8611	Good answer. My rule of thumb is that if your checking a given variable for more than a two values (or settings) than use SELECT/CASE.
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#180121 - 2007-09-04 03:49 AM Re: If vs select [Re: Shawn]
Les Les KiX Master Registered: 2001-06-11 Posts: 12734 Loc: fortfrances.on.ca	I go by mutual exclusivity. If there is only one right answer, go with Select Case. _________________________ Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.
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#180125 - 2007-09-04 04:57 AM Re: If vs select [Re: Les]
NTDOC NTDOC Administrator Registered: 2000-07-28 Posts: 11629 Loc: CA	And just to mix it up you can place an IF within Select or a Select within an IF However I generally agree with Les on this if you're asking a few things but only one can be correct I'd use SELECT - you could do the same thing with IF but just not as clean (IMHO)
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#180128 - 2007-09-04 08:37 AM Re: If vs select [Re: NTDOC]
Arend_ Arend_ MM club member Registered: 2005-01-17 Posts: 1896 Loc: Hilversum, The Netherlands	I agree with Shawn, more then 2 possible anwers, go with Select, Else use If. hmmmmm... Code: If $array Select Case EndSelect Else If EndIf EndIf
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#180130 - 2007-09-04 09:28 AM Re: If vs select [Re: Arend_]
Richard H. Richard H. Administrator Registered: 2000-01-24 Posts: 4946 Loc: Leatherhead, Surrey, UK	When we say mutually exclusive, we don't necessarily mean that only one condition is true, we mean that we only want one condition to be actioned as true. Consider the following example: Code: $iBorgThreat=udfEvaluateThreat("Borg") Select Case $iBorgThreat < 10 $sAlertCondition="Green" Case $iBorgThreat < 50 $sAlertCondition="Yellow" Case $iBorgThreat < 99 $sAlertCondition="Red" Case 1 $sAlertCondition="Red" udfInitateSelfDestruct() EndSelect If $iBorgThreat is 40, then the first condition is not true - it is not less than 10 so it is not a "Green" thread. However, it is less than both 50 (yellow) and 99 (red), so both conditions are true. The important thing to note about Select is that when a condition is found to be true none of the remaining conditions are evaluated. This means that the code works as you'd expect, and the Enterpise is set to condition yellow. You can write all Select code as nested If/EndIf, however once you get more than three or four conditions the code becomes extremely difficult to read, and you are very likely to introduce an error if you make changes later.
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