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furrycow

Removing letters from a string

14 posts in this topic

#1 ·  Posted (edited)

So, i have a string, say, "HELLO", and i want it to be returned in multiple ways..

For instance, as i can see it, on the first loop, it would remove one letter and return the rest of the string, eg. it would return the following strings:

ELLO
HLLO
HELO
HELO
HELL

And i managed to do that fine using:

$Word="HELLO"
$WordRETURN=""

For $x=1 To StringLen($Word)
$WordNEW=StringReplace($Word,$x," ",1)
$WordNEW=StringStripWS($WordNEW,8)

$WordRETURN&=$WordNEW&@CRLF

Next

MsgBox(0,"",$WordRETURN)

However, i want to now do it again, but taking out 2 letters each time, so the results would look something like:

LLO
ELO
ELO
ELL
LLO
HLO
HLO
HLL
ELO
HLO
HEO
HEL
....AND SO ON

And then following that, i want to do it again, taking out three letters.

I have looked at the concept of making a 5x5 array in the case of "HELLO", so it would look something like this:

H H H H H
E E E E E
L L L L L
L L L L L
O O O O O

And then loop through so you would look at H in the first column then move on to the next column, then once that bit was done, youd return to the first column on E and then move onto the next column...maybe this bit wasnt explained to well, if you dont understand what i am saying here, say so.

So is anyone able to shed some light?

Thanks!!

Edited by furrycow

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Maybe something like this.

$Word = "HELLOGOODBYE"
$WordRETURN = ""
$Width = 2

For $x = 1 To StringLen($Word) Step $Width
    $sleft = StringLeft($Word, $x - 1)

    $sright = StringTrimLeft($Word, $x + $Width - 1)

    $WordNEW = $sleft & $sright
    $WordRETURN &= $WordNEW & @CRLF

Next

MsgBox(0, "", $WordRETURN)

Serial port communications UDF Includes functions for binary transmission and reception.printing UDF Useful for graphs, forms, labels, reports etc.Add User Call Tips to SciTE for functions in UDFs not included with AutoIt and for your own scripts.Functions with parameters in OnEvent mode and for Hot Keys One function replaces GuiSetOnEvent, GuiCtrlSetOnEvent and HotKeySet.UDF IsConnected2 for notification of status of connected state of many urls or IPs, without slowing the script.

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Thanks, but yours removes letters

1 and 2,

and then

3 and 4,

and then

4 and 5...

I was hoping for a system that...

Removes letters

1 and 2,

and then

1 and 3,

and then

1 and 4,

and then

1 and 5,

and then

2 and 1,

and then

2 and 3,

and then

2 and 4,

and then

2 and 5...

Thanks for your help so far!


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Still not clear? Removing 1 and 2 would produce the same result as removing 2 and 1. Do you really want to repeat that? And what happens after 5 and 4? Do you then start the process again by removing 1 and 2 and 3 then 1 and 2 and 4? How long does this go on for, until you have removed all letters, or what?

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Sorry about not being clear enough.

In answer to your question, yes 2 and 1 would produce the same as 1 and 2, and no i dont want to repeat, but i figured getting rid of repetition would be easy once i had the main function in place.

And youre correct, after removing all the two letters, i would then want to move onto removing three, and then four and so on, AS LONG AS, the remaining string length was >1.

After removing 5 and 4, it would then loop to go on and do, "1 and 2 and 3" as long as the remaining string length is greater than 1.

It can return each string as it goes/add them to an array/or add them onto an existing string, i dont mind.

Thanks czardas


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Sorry about not being clear enough.

In answer to your question, yes 2 and 1 would produce the same as 1 and 2, and no i dont want to repeat, but i figured getting rid of repetition would be easy once i had the main function in place.

And youre correct, after removing all the two letters, i would then want to move onto removing three, and then four and so on, AS LONG AS, the remaining string length was >1.

After removing 5 and 4, it would then loop to go on and do, "1 and 2 and 3" as long as the remaining string length is greater than 1.

It can return each string as it goes/add them to an array/or add them onto an existing string, i dont mind.

Thanks czardas

Must the results be in the order you describe? If not then it's simple.(I think)


Serial port communications UDF Includes functions for binary transmission and reception.printing UDF Useful for graphs, forms, labels, reports etc.Add User Call Tips to SciTE for functions in UDFs not included with AutoIt and for your own scripts.Functions with parameters in OnEvent mode and for Hot Keys One function replaces GuiSetOnEvent, GuiCtrlSetOnEvent and HotKeySet.UDF IsConnected2 for notification of status of connected state of many urls or IPs, without slowing the script.

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In order would be nice, but it shouldnt matter, because i can put them into an array and sort it...

...so you have a simple idea...?? :D


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maybee something like this?

it does what you want ... just not in the order that you want it Posted Image

remove("HELLO")

Func remove($text)
    $text = StringSplit($text,"")
    Dim $arr[UBound($text)]
    back($text,1,$arr)
EndFunc

Func back($text,$k,$arr)
    If $k=$text[0]+1 Then
        Local $ret=""
        For $i=1 To $text[0]
            If Not $arr[$i] Then $ret&=$text[$i]
        Next
        ConsoleWrite($ret & @CRLF)
    Else
        For $i=0 To 1
            $arr[$k] = $i
            back($text,$k+1,$arr)
        Next
    EndIf
EndFunc
Posted Image

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YOU LEDGEND!

Thank you so much, man have i been trying to get this to work for some time!!

I was on the right trail though, i remember having a script that searched all files in all levels of directories in a specific directory, where it kept calling back on the function, so i was testing with that, but you have saved me a tonne of time!!

Thanks everyone for their help.


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remove("HELLO")

Func remove($text)
    $text = StringSplit($text,"")
    Dim $arr[UBound($text)]
    back($text,1,$arr)
EndFunc

Func back($text,$k,$arr)
    If $k=$text[0]+1 Then
        Local $ret=""
        For $i=1 To $text[0]
            If Not $arr[$i] Then $ret&=$text[$i]
        Next
        ConsoleWrite($ret & @CRLF)
    Else
        For $i=0 To 1
            $arr[$k] = $i
            back($text,$k+1,$arr)
        Next
    EndIf
EndFunc
Posted Image

Sweet! It reminds me of ping pong. :D

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For the record, I was thinking of this

strip("HELBO")

Func Strip($text)
    $a = StringSplit($text, "")
    For $i = 0 To 2 ^ StringLen($text) - 1
    $res = ''
    For $j = 1 To StringLen($text)
    If BitAND($i, 2 ^ ($j-1)) Then $res &= $a[$j]
    Next
    ConsoleWrite($res & @CRLF)
    Next
EndFunc ;==>Strip

Serial port communications UDF Includes functions for binary transmission and reception.printing UDF Useful for graphs, forms, labels, reports etc.Add User Call Tips to SciTE for functions in UDFs not included with AutoIt and for your own scripts.Functions with parameters in OnEvent mode and for Hot Keys One function replaces GuiSetOnEvent, GuiCtrlSetOnEvent and HotKeySet.UDF IsConnected2 for notification of status of connected state of many urls or IPs, without slowing the script.

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For the record, I was thinking of this

strip("HELBO")

Func Strip($text)
    $a = StringSplit($text, "")
    For $i = 0 To 2 ^ StringLen($text) - 1
    $res = ''
    For $j = 1 To StringLen($text)
    If BitAND($i, 2 ^ ($j-1)) Then $res &= $a[$j]
    Next
    ConsoleWrite($res & @CRLF)
    Next
EndFunc ;==>Strip

So glad you posted this martin. I never knew what bitwise operations were about, until I read this. How useful!

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This should also work the way you want.

;;***********************************************
;; needs patch to Array.au3 as per ticket #1438
;;***********************************************

#include <Array.au3>

Global $str = 'Hello_World!'        ; example input

Local $list = StringSplit($str, '', 2)
Local $tuples[1] = [0], $tmp
For $i = UBound($list) - 1 To 1 Step -1
    $tmp = _ArrayCombinations($list, $i, '')        ;; needs patch to Array.au3 as per ticket #1438
    _ArrayDelete($tmp, 0)
    _ArrayConcatenate($tuples, $tmp, 0)
Next
_ArrayDelete($tuples, 0)
_ArrayDisplay($tuples, "Final result")

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Well thanks to you both martin and Xand3r, and actually, just running each of yours 10 times, with the string "HELLO", martin yours wins everytime, with an average of about 0.00400 seconds to xand3r's 0.00650 seconds.


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