json - How do I increment a filename in batch? -


i programming batch file can track lost android phones using google maps geolocation api. cannot understand wrong code. followed found on internet if run code, returns "the syntax incorrect" or that.it increments filename if basename exists. can show me wrong code , how correct it?

:mainprocessnew cd c:\users\%username%\documents %%g in (*.json) ( set file = %%g ) set "basename=data" set "n=0"  :loop set /a n+=1 if exist "%basename%%n%.json ( goto loop )  echo.>"c:\users\%username%\documents\data%n%.json"

use batch code:

:mainprocessnew cd /d "%userprofile%\documents" %%g in (*.json) set "filename=%%g"  set "basename=data" set "filenumber=0"  :filenameloop set /a filenumber+=1 if exist "%basename%%filenumber%.json" goto filenameloop  echo.>"%userprofile%\documents\%basename%%filenumber%.json"

the main mistake missing double quote in if condition line.

but there other mistakes , code lines improved.

don't use c:\users\%username% because profile directory of user can on drive drive c:. use instead value of predefined environment variable userprofile.

the path documents folder of current user can contain 1 or more spaces, example when user name contains space. therefore enclose user profile related folder paths in double quotes.

the command cd should used /d change current drive if not 100% guaranteed current directory of batch process , new current directory on same drive.

never assign value environment variable spaces around equal sign, see why no string output 'echo %var%' after using 'set var = text' on command line? explanation of common mistake.

don't define command block parentheses commands for , if if 1 command should executed 2 commands designed running 1 command.

it advisable use variable names in camelcase notation. hard search n find occurrences of environment variable, easy search filenumber.

for understanding used commands , how work, open command prompt window, execute there following commands, , read entirely pages displayed each command carefully.

  • cd /?
  • echo /?
  • for /?
  • goto /?
  • if /?
  • set /?

-

Comments

Post a Comment

Popular posts from this blog

amazon web services - S3 Pre-signed POST validate file type? -

i know it's possible put limit on file size content-length-range header. possible validate file type? https://docs.aws.amazon.com/amazons3/latest/dev/httppostforms.html#policyconditions i see there content-type header, if set say, audio/mp3 allow mp3 files , return error if file not mp3? i found previous question answers mention validating file size: s3 direct upload restricting file size , type you can specify content-type @ post request. you can specify @ signature, post must done content-type: { "expiration": "2007-12-01t12:00:00.000z", "conditions": [ {"acl": "public-read" }, {"bucket": "johnsmith" }, {"content-type: "audio/mp3"} ] } creating html form (using aws signature version 4) edit: @ previous question found, checking content-type.
Read more

c# - Check Keyboard Input Winforms -

i wondering if instead of doing this protected override void onkeydown(keyeventargs e) { if (e.keycode == keys.a) console.writeline("the key down."); } i set bool method , this: if(keydown(keys.a)) // whatever here i've been sitting here ages trying figure out how it. can't wrap head around it. in case wondering, plan call bool inside different method, check input. since want perform action after pressing key, using keydown event enough. but in cases suppose want check if specific key down in middle of process, can use getkeystate method way: [dllimport("user32.dll", charset = charset.auto, exactspelling = true)] public static extern short getkeystate(int keycode); public const int key_pressed = 0x8000; public static bool iskeydown(keys key) { return convert.toboolean(getkeystate((int)key) & key_pressed); } you should know, each time check key state using example iskeydown(keys.a) method returns true if ke...
Read more