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jethrow
Joined: 24 May 2009
Posts: 1907
Location: Iowa, USA
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 Posted: Sun Mar 14, 2010 5:21 am Post subject: Distinguish between a String & Number |
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Is there a way to distinguish between say 123 and "123" in AHK? I know I've seen these treated differently when working with COM. Is there perhaps a simple dll call that could determine the difference?
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Murx
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| Posted: Sun Mar 14, 2010 6:00 am Post subject: |
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| Code: | MsgBox % 123/1
MsgBox % "123"/1 |
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jethrow
Joined: 24 May 2009
Posts: 1907
Location: Iowa, USA
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| Posted: Sun Mar 14, 2010 6:44 am Post subject: |
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Thanks for the reply Murx. I should clarify more - I want to pass the contents to a function. So, here's where the issue becomes relevant: | Code: | var := 123
var2 := "123"
MsgBox % var/1
MsgBox % var2/1
If var is integer
MsgBox
If var2 is integer
MsgBox |
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Murx
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| Posted: Sun Mar 14, 2010 7:45 am Post subject: |
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| Code: | var = 123
var2 = "123"
MyFunc(var)
MyFunc(var2)
MyFunc(var) {
If va is integer
MsgBox % var
Return
} |
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Murx
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| Posted: Sun Mar 14, 2010 7:46 am Post subject: |
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Ouch! 
| Code: | [...]
If var is integer
[...] |
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OceanMachine
Joined: 15 Oct 2007
Posts: 780
Location: England
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| Posted: Sun Mar 14, 2010 7:56 am Post subject: |
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| Murx wrote: | | Code: | var = 123
var2 = "123"
MyFunc(var)
MyFunc(var2)
MyFunc(var) {
If var is integer
MsgBox % var
Return
} |
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That won't work, because one of the variables you are assigning contains a 'literal' pair of quotes and the other doesn't.
If you use the ":=" assignment operator instead, this is like saying | Code: | var1 := 123
var2 := """123"""
... |
..which will mean they are not the same |
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Sean
Joined: 12 Feb 2007
Posts: 2462
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| Posted: Sun Mar 14, 2010 11:42 am Post subject: |
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| AHK doesn't expose any way for a script to distinguish the two. |
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Tuncay
Joined: 07 Nov 2006
Posts: 1886
Location: Germany
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| Posted: Sun Mar 14, 2010 11:57 am Post subject: |
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At the time of assignment, the type of variable is converted to string allways. It is dynamically converted back to number, if needed. In example at math operations.
That is what Sean said, no.
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jaco0646
Joined: 07 Oct 2006
Posts: 3113
Location: MN, USA
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| Posted: Sun Mar 14, 2010 4:25 pm Post subject: |
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| OceanMachine wrote: | | ..which will mean they are not the same |
That's the point.
What's wrong with the example by Murx? It distinguishes between 123 and "123" just fine (after the spelling correction). | Code: | var = 123 ;Int
var2 = "123" ;Str
MsgBox,% MyFunc(var)
MsgBox,% MyFunc(var2)
ExitApp
MyFunc(var) {
If var is integer
Return, "Int"
Else Return, "Str"
} |
Last edited by jaco0646 on Sun Mar 14, 2010 4:29 pm; edited 1 time in total |
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Tuncay
Joined: 07 Nov 2006
Posts: 1886
Location: Germany
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| Posted: Sun Mar 14, 2010 4:28 pm Post subject: |
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Yes that would work. but this is a way where the user make extra effort to save the type by himself and manages. My point is about that AutoHotkey drops the type of variable. The example of Murx is a way how the user manages on its own to remember which variable have which type.
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jaco0646
Joined: 07 Oct 2006
Posts: 3113
Location: MN, USA
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| Posted: Sun Mar 14, 2010 4:33 pm Post subject: |
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| Tuncay wrote: | | the user make extra effort |
jethrow was already doing that (just using the wrong operator). |
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Tuncay
Joined: 07 Nov 2006
Posts: 1886
Location: Germany
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| Posted: Sun Mar 14, 2010 4:38 pm Post subject: |
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I did not realize that he WANT write the surrounding quotes for distinguishing. Then your example is working like jethrow should want to. here is another possible way.
| Code: | var = 123 ;Int
var2 = "123" ;Str
MsgBox,% isString(var)
MsgBox,% isString(var2)
isString(ByRef _var)
{
Return (SubStr(_var, 1, 1) = """")
} |
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Sean
Joined: 12 Feb 2007
Posts: 2462
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| Posted: Sun Mar 14, 2010 4:42 pm Post subject: |
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The target data is 123, not "123". Sometimes you need to pass it as an integer, sometimes as a string. Some languages distinguish the two as:
| Code: | x := 123 ; integer
x := "123" ; string
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HotKeyIt
Joined: 18 Jun 2008
Posts: 4652
Location: AHK Forum
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| Posted: Sun Mar 14, 2010 5:18 pm Post subject: |
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There is a way to distinguish  | Code: | var := 123 ;Int
var2 := "123" ;Str
MsgBox,% MyFunc(var)
MsgBox,% MyFunc(var2)
ExitApp
MyFunc(var=0) {
Format:=A_FormatInteger
SetFormat,IntegerFast,Hex
variable:=var ;will not result to hex if it is not an integer
If (SubStr(variable,1,2)="0x")
return:="Int"
else return:="Str"
SetFormat,IntegerFast,%Format%
Return return
} |
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Last edited by HotKeyIt on Mon Mar 15, 2010 1:30 pm; edited 2 times in total |
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jethrow
Joined: 24 May 2009
Posts: 1907
Location: Iowa, USA
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| Posted: Sun Mar 14, 2010 6:19 pm Post subject: |
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Call it mind reading, but OceanMachine understood what I meant - which Sean so nicely pointed out. Thank you for the reply HotKeyIt - here is a shorted example: | Code: | var := 123 ;Int
var2 := "123" ;Str
SetFormat,IntegerFast,Hex
var:=var, var2:=var2
MsgBox,% var "`n" var2 |
EDIT - changed from Integer to IntegerFast per Lexikos' recommendation.
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Basic Webpage Controls
COM Object Reference
Last edited by jethrow on Mon Mar 15, 2010 12:39 pm; edited 1 time in total |
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