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Chris
Site Admin
Joined: 02 Mar 2004
Posts: 10450
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 Posted: Wed Nov 29, 2006 7:29 pm Post subject: v1.0.46 released: SubStr() and more expression operators |
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NOTE: Although this release has been extensively tested and is not expected to break any existing scripts, several low-level enhancements were made. If you have any mission-critical scripts, it is recommended that you retest them and/or wait a few weeks for any bugs to get fixed.
Here are the changes for v1.0.46:
Added function SubStr(), which retrieves the specified number of characters at the specified position in a string.
Added assignment operators //=, .=, |=, &=, ^=, >>=, and <<=, which can be used anywhere in expressions. For example, Var .= "abc" appends the string "abc" to the end of Var's current contents.
Added full support in expressions for the operators ++, --, +=, -=, *=, and /= (formerly, they could be used only as the leftmost operator on a line). All assignment operators (especially ++ and --) behave in a C-like way when their result is used by some other operator.
Added the ternary operator (?:), which is a shorthand replacement for the if-else statement. For example, var := x>y ? 2 : 3 assigns the value 2 if x is greater than y; otherwise it assigns 3.
Added support for comma-separated expressions, which allow a single line to contain multiple assignments, function calls, and other expressions. [thanks PhiLho & Titan]
Improved variable declarations to support initialization on the same line. Note: A static variable's initialization occurs only once, before the script begins executing.
Improved line continuation to support all expression operators. For example, a line that starts with "?" or "+" is automatically merged with the line above it.
Improved performance of operators "." and ".=" to be as fast as the percent-sign method of appending a string.
Improved expressions to allow more types of consecutive unary operators such as !!Var. [thanks Laszlo]
Changed Critical to check messages less often (20 vs. 10ms), which improves the reliability of frequently-called OnMessage functions. [thanks Majkinetor]
Changed: A variable named simply "?" is no longer valid in expressions due to the new ternary operator.
Fixed hotkeys to support ":::" (colon as a hotkey) and ": & x" (colon as a hotkey prefix).
Fixed the installer to remove psapi.dll from the AutoHotkey folder (except on Windows NT4). This avoids a conflict with Internet Explorer 7. [thanks to all those who reported it]
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In case anyone is wondering, I chose SubStr() as the name rather than StrSub() or StrMid() because naming functions consistently doesn't seem as valuable as good readability and conciseness. Furthermore, many other languages have a SubStr() function that behaves the same way, which reduces the learning curve for people coming from some other language to AutoHotkey (or vice versa). |
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Laszlo
Joined: 14 Feb 2005
Posts: 3877
Location: Pittsburgh
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| Posted: Wed Nov 29, 2006 8:17 pm Post subject: |
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| Wow! These changes should warrant a new subversion number. How about v1.1.0? Scripts will look drastically different with the new syntax enhancements... |
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toralf
Joined: 31 Jan 2005
Posts: 3842
Location: Bremen, Germany
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| Posted: Wed Nov 29, 2006 8:17 pm Post subject: |
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Hi Chris,
Thanks for the new features. I will use several of them for sure.
_________________
Ciao
toralf  |
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ahklerner
Joined: 26 Jun 2006
Posts: 1004
Location: USA
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| Posted: Wed Nov 29, 2006 8:27 pm Post subject: |
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| Chris.....You are making this better all of the time..... |
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foom
Joined: 19 Apr 2006
Posts: 386
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| Posted: Wed Nov 29, 2006 9:07 pm Post subject: |
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Wow after seeing a new version is released and reading that expression way of concatenating is as fast as the deref way i had to do a little benchmarking.
| Code: | setbatchlines -1
#noenv
DllCall("QueryPerformanceCounter", "Int64 *", CounterBefore)
loop, 1000
{
x .="xxxxxxxxxxxxxxxxxxxxxxxxxxx"
;x=%x%xxxxxxxxxxxxxxxxxxxxxxxxxxx
}
DllCall("QueryPerformanceCounter", "Int64 *", CounterAfter)
MsgBox % "Elapsed QPC time // 1000 is " . (CounterAfter - CounterBefore)//1000 |
; deref method ~ 6000
; old expression method ~ 90000 .~ 12 times slower
; new expression method ~ 7000 .Not exactly like deref. But still wow:"Warp Speed Twelve, Mr. La Forge"
Thank Chris. Keep up the hard work.  |
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SKAN
Joined: 26 Dec 2005
Posts: 5298
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| Posted: Wed Nov 29, 2006 9:41 pm Post subject: |
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I never expected so much! Many thanks .. 
Special thanks for the SubStr(). I was craving for it for a long time!
| Chris wrote: | | In case anyone is wondering, I chose SubStr() as the name rather than StrSub() or StrMid() because naming functions consistently doesn't seem as valuable as good readability and conciseness. |
IMHO, SubStr() is very much consistent with InStr(), and I can forsee the usage of InStr() as a SubStr() parameter.
Regards,
_________________
SKAN - Suresh Kumar A N |
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PhiLho
Joined: 27 Dec 2005
Posts: 6702
Location: France (near Paris)
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| Posted: Thu Nov 30, 2006 9:53 am Post subject: |
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| Laszlo wrote: | | Wow! These changes should warrant a new subversion number. How about v1.1.0? Scripts will look drastically different with the new syntax enhancements... |
That's funny, while reading this long list of features, I was thinking exactly the same thing...
I will have to update my lexer for Scintilla...
Lot of hard work here, I download it immediately to test it!
And as Goyyah pointed out, the new function is at least consistent with its brother, InStr()...
_________________
 vPhiLho := RegExReplace("Philippe Lhoste", "^(\w{3})\w*\s+\b(\w{3})\w*$", "$1$2")
Last edited by PhiLho on Thu Nov 30, 2006 11:37 am; edited 1 time in total |
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Thalon
Joined: 12 Jul 2005
Posts: 640
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corrupt
Joined: 29 Dec 2004
Posts: 2328
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| Posted: Fri Dec 01, 2006 2:05 am Post subject: Re: v1.0.46 released: SubStr() and more expression operators |
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I'm glad I waited a bit longer before updating a few existing scripts. Thanks for the improvements .
| Chris wrote: | | In case anyone is wondering, I chose SubStr() as the name rather than StrSub() or StrMid() because naming functions consistently doesn't seem as valuable as good readability and conciseness. |
The only drawback for me is that I frequently use the index in a help file as a quick reference. I could always use the Contents tab I guess... but I never do  . |
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JSLover
Joined: 20 Dec 2004
Posts: 542
Location: LooseChange911.com... the WTC attacks were done by the US Gov't... the official story is a lie...
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| Posted: Fri Dec 01, 2006 9:19 am Post subject: Re: v1.0.46 released: SubStr() and more expression operators |
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| corrupt wrote: | | The only drawback for me is that I frequently use the index in a help file as a quick reference. |
...I say name stuff the way that sounds best...like SubStr (substring) vs StrSub (string sub??? tract? stitute?)...but then add index entries like...
...clicking on the entry would take you to the help page with the correct name...so name for best-looking/sounding, but patch it up in the index...I too only use the index for help...
_________________
LooseChange911.com • See Loose Change (click image!) • LC Blog |
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Chris
Site Admin
Joined: 02 Mar 2004
Posts: 10450
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| Posted: Fri Dec 01, 2006 1:42 pm Post subject: Re: v1.0.46 released: SubStr() and more expression operators |
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| PhiLho wrote: | | Laszlo wrote: | | Wow! These changes should warrant a new subversion number. How about v1.1.0? Scripts will look drastically different with the new syntax enhancements... |
That's funny, while reading this long list of features, I was thinking exactly the same thing... |
I was thinking the opposite because I thought not many people would care about C-like operators. I even delayed this release to add SubStr() to help justify making it a major vs. minor version number.
| JSLover wrote: | | so name for best-looking/sounding, but patch it up in the index |
Thanks for the idea. I've added index entries called "string: InStr()" and "string: SubStr()". |
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Tuncay
Joined: 07 Nov 2006
Posts: 379
Location: Berlin
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| Posted: Sun Dec 03, 2006 9:02 pm Post subject: |
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Chris, thx for the changes you made in this version. I like this update, 'cauze SubStr() and some operators, especially .=.
But on the other hand, adding some of the operators is a bad idea. I do not understand why you have introduced the ternary operator ?: and command separated expressions? They lead to badly readable scripts. Ok, its a lot fewer to write, but I don't like that. |
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Chris
Site Admin
Joined: 02 Mar 2004
Posts: 10450
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| Posted: Mon Dec 04, 2006 12:43 am Post subject: |
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| Tuncay wrote: | | I do not understand why you have introduced the ternary operator ?: and command separated expressions? They lead to badly readable scripts. |
It's a matter of personal scripting style. Some people crave the ability to write related expressions all on one line. In addition, the ternary operator can simplify some kinds of expressions, and in some cases gives better performance. |
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hs2
Joined: 25 Feb 2005
Posts: 11
Location: Germany
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| Posted: Mon Dec 04, 2006 1:04 am Post subject: |
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@Chris: You are my number one hero !
@Tuncay: If you don't like it - don't use it
HS2 |
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SKAN
Joined: 26 Dec 2005
Posts: 5298
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| Posted: Mon Dec 04, 2006 10:37 am Post subject: |
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| Tuncay wrote: | | adding some of the operators is a bad idea. I do not understand why you have introduced the ternary operator ?: and command separated expressions? They lead to badly readable scripts. |
I had faced instances where my script had a specific need to nullify the variable contents.
Maybe initialising variables one-a-line might be readable for others. But nullifying existing variables the same way looks ugly and will make the code unneccessarily long. Like:
| Code: | 2GuiClose:
Gui, 2:Destroy
Var1=
Var2=
Var3=
Var4=
Var5=
Var6=
Return |
Instead of:
| Code: | 2GuiClose:
Gui, 2:Destroy
Var1:="" , Var2:="" , Var3:="" , Var4:="" , Var5:="" , Var6:="" ; Resetting Vars
Return |
JMHO .. Regards,
Edit:ListView is an another situation where I find it very useful:
| Code: | LV_ModifyCol(1,"60 Integer"), LV_ModifyCol(2,"60 Integer"), LV_ModifyCol(3,"36 Center")
LV_ModifyCol(4,"36 Integer"), LV_ModifyCol(5,"36 Center"), LV_ModifyCol(6,"100") |
_________________
SKAN - Suresh Kumar A N
Last edited by SKAN on Mon Dec 04, 2006 11:08 am; edited 1 time in total |
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