StringTrimRight until a certain character

[supraspecies]

A little ashamed I can't figure out something relatively simple, but I'd appreciate the help. I need to trim the string until the first backslash from the right. Like:

'aaa\bbb\ccc'

I need to remove "\ccc". The problem here being:

1) "ccc" is a random value

2) "ccc" might have a random number of characters

With that said, I can't use either simple replacement string, or subtraction by a number of characters. What would be the best way around it?

Thank you.

[TheDcoder]

I think I made a function called StringTrimRightUntil... Check my snippets (link in my signature)

[AspirinJunkie]

$s_String = 'aaa\bbb\ccc'

$s_NewString = StringLeft($s_String, StringInStr($s_String, "\", 1, -1)-1)

MsgBox(0, "The trimmed string", $s_NewString)

 

Edited July 5, 2016 by AspirinJunkie

[dmob]

One way:

Local $sString = 'aaa\bbb\ccc'
Local $iPos = StringInStr($sString, "\", 0, -1) - 1
Local $sNuString = StringMid($sString, 1, $iPos)
ConsoleWrite("$sNuString: " & $sNuString & @CRLF)

StringInStr has an option to search from the right.

Sure the Regex gurus can whip a one-liner

 

[TheDcoder]

1 minute ago, dmob said:

Sure the Regex gurus can whip a one-liner

Hahaha, so true . But avoid using Regex whenever possible, its ugly.

[dmob]

He he he AspirinJunkie beat me to it..... I think I should take some too 

[dmob]

Just now, TheDcoder said:

Hahaha, so true . But avoid using Regex whenever possible, its ugly.

Care to elaborate.... I've been aspiring to use Regex wherever possible, I thought it's the better (or grown-up ) way to do things?

[TheDcoder]

@dmob Sure, its fast and easy to use Regexes but it is a bad practice in terms of code styling . (My code looks super ugly with them .)

[AspirinJunkie]

So let's give supraspecies the choice:

$s_String = 'aaa\bbb\ccc'

$s_NewString = StringRegExpReplace($s_String, "\\[^\\]+$", "")

MsgBox(0, "The trimmed string", $s_NewString)

 

Edited July 5, 2016 by AspirinJunkie

[dmob]

Not so sure about easy.... They give me a headache.

[TheDcoder]

@dmob Easy to use, not easy to make!

[supraspecies]

Thank you all very much for your replies. So many different suggestions! The problem is solved.

[dmob]

Just now, AspirinJunkie said:

So let's give supraspecies the choice:

$s_String = 'aaa\bbb\ccc'

$s_NewString = StringRegExpReplace($s_String, "[^\\]+$", "")

MsgBox(0, "The trimmed string", $s_NewString)

 

Your regex returns a trailing slash... The OP said 

 

30 minutes ago, supraspecies said:

I need to remove "\ccc".

 

[TheDcoder]

@supraspecies Just out of curiosity, which solution did you use?

[AspirinJunkie]

Ah ok. Seems that the eyes doesn't benefit from Aspirin ...

I edit the two solutions.

[Melba23]

TheDcoder,

Quote

Sure, its fast and easy to use Regexes but it is a bad practice in terms of code styling

Wrong on both counts:

• Regexes are not easy (unless your brain is wired differently from the majority of coders), but can be super efficient.
• Using them is most certainly not "bad practice" of any form.

As George always used to point out, the real difficulty with Regexes is learning when not to use them when a simpler solution will suffice. This case is one where a Regex is the sensible answer:

ConsoleWrite(StringRegExpReplace("aaa\bbb\ccc", "(^.*\\)(.*)", "$1") & @CRLF)

M23

[TheDcoder]

I disagree @Melba23, Regexes look ugly and are bad for code styling in my opinion.  btw, "easy" as in use, not in making them (already stated in post #11)

[jchd]

@TheDcoder,

Let me strongly disagree in turn: it isn't because a language syntax or writing system looks ugly to some people that it's inherently bad or that it can't be a good vehicle for powerful and subtle concepts (or programs). मानक हिन्दी looks like graffiti to most westerners, yet it's the 4th most used language on Earth as you surely know.

APL looks terrible to non-APLists but it's unprecedently concise and powerful; APL is currently regaining interest (as APL2, A+ or J) in several domains.

Perl makes a heavy use of regexps but has been the workhorse of the web and many other use cases,
PHP without regexps is like a spider with no legs,
and the list goes on.

Almost all powerful generic languages offer SRE support and for a reason, else noone would bother wasting energy, time and money to include such support if it didn't have a significant usefulness. Your opinion seems based on your own laziness or unwillingness to approach SREs with a technically open mindframe.

[TheDcoder]

@jchd I take back my words .

P.S

5 minutes ago, jchd said:

मानक हिन्दी

Translated into English: "Believe Hindi"

[jchd]

It's the name for the official Modern Standard Hindi language in whole India in Devanagari script, even if some areas favor other languages/dialects and scripts.