Data update

Task/String-matching/Batch-File/string-matching-1.bat

@@ -0,0 +1,70 @@
+::NOTE #1: This implementation might crash, or might not work properly if
+::you put some of the CMD special characters (ex. %,!, etc) inside the strings.
+::
+::NOTE #2: The comparisons here are case-SENSITIVE.
+::NOTE #3: Spaces in strings are considered.
+
+@echo off
+setlocal enabledelayedexpansion
+
+::The main things...
+set "str1=qwertyuiop"
+set "str2=qwerty"
+call :str2_lngth
+call :matchbegin
+
+set "str1=qweiuoiocghiioyiocxiisfguiioiuygvd"
+set "str2=io"
+call :str2_lngth
+call :matchcontain
+
+set "str1=blablabla"
+set "str2=bbla"
+call :str2_lngth
+call :matchend
+
+echo.
+pause
+exit /b 0
+::/The main things.
+
+::The functions...
+:matchbegin
+echo.
+if "!str1:~0,%length%!"=="!str2!" (
+	echo "%str1%" begins with "%str2%".
+) else (
+	echo "%str1%" does not begin with "%str2%".
+)
+goto :EOF
+
+:matchcontain
+echo.
+set curr=0&set exist=0
+:scanchrloop
+if "!str1:~%curr%,%length%!"=="" (
+	if !exist!==0 echo "%str1%" does not contain "%str2%".
+	goto :EOF
+)
+if "!str1:~%curr%,%length%!"=="!str2!" (
+	echo "%str1%" contains "%str2%". ^(in Position %curr%^)
+	set exist=1
+)
+set /a curr+=1&goto scanchrloop
+	
+:matchend
+echo.
+if "!str1:~-%length%!"=="!str2!" (
+	echo "%str1%" ends with "%str2%".
+) else (
+	echo "%str1%" does not end with "%str2%".
+)
+goto :EOF
+
+:str2_lngth
+set length=0
+:loop
+if "!str2:~%length%,1!"=="" goto :EOF
+set /a length+=1
+goto loop
+::/The functions.

Task/String-matching/Batch-File/string-matching-2.bat

@@ -0,0 +1,12 @@
+@echo off
+setlocal enableextensions enabledelayedexpansion
+set /p a=
+set /p b=
+set /a i=0
+for %%i in (^^%b% %b% %b%$) do (
+echo/%a% | findstr /rc:"%%i" >nul 2>nul && set contain.!i!=Yes|| set contain.!i!=No
+set /a i+=1
+)
+echo "%a%" starts with "%b%": %contain.0%
+echo "%a%" ends with "%b%": %contain.1%
+echo "%a%" contains "%b%": %contain.2%

Task/String-matching/Batch-File/string-matching-3.bat

@@ -0,0 +1,15 @@
+@echo off
+setlocal enableextensions enabledelayedexpansion
+set /p a=
+set /p b=
+set "macroset=(set contain.M=Yes) else (set contain.M=No)"
+:: https://ss64.com/nt/syntax-replace.html
+call set "t=%%a:%b%=#%%"
+if "#"=="%t:~0,1%" %macroset:M=0%
+call set "t=%%a:*%b%=%%"
+if ""=="%t%" %macroset:M=1%
+call set "t=%%a:%b%=%%"
+if not "%a%"=="%t%" %macroset:M=2%
+echo "%a%" starts with "%b%": %contain.0%
+echo "%a%" ends with "%b%": %contain.1%
+echo "%a%" contains "%b%": %contain.2%

Task/String-matching/Batch-File/string-matching-4.bat

@@ -0,0 +1,16 @@
+@echo off
+setlocal enableextensions enabledelayedexpansion
+set /p a=
+set /p b=
+call :getres startsWith.bat "%a%" "%b%"
+echo "%a%" starts with "%b%": %result%
+call :getres endsWith.bat "%a%" "%b%"
+echo "%a%" ends with "%b%": %result%
+set idx=
+call indexOf.bat "%a%" "%b%" idx
+echo "%a%" contains "%b%" at: %idx%
+goto:eof
+
+:getres
+call %1 %2 %3 && set result=No||set result=Yes
+goto:eof