Create a file: Difference between revisions
m (Changed over to works with template) |
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os.mkdir("/docs") |
os.mkdir("/docs") |
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{{works with|Python|2.5}} |
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[[Category:Python]] |
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Exception-safe way to create file: |
Exception-safe way to create file: |
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from __future__ import with_statement |
from __future__ import with_statement |
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'''Platform:''' [[.NET]] |
'''Platform:''' [[.NET]] |
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{{works with|Visual Basic .NET|9.0+}} |
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'''Language Version:''' 9.0+ |
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'Current Directory |
'Current Directory |
Revision as of 02:35, 19 February 2008
You are encouraged to solve this task according to the task description, using any language you may know.
In this task, the job is to create a new empty file called "output.txt" of size 0 byte and an empty directory called "docs". This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.
DOS Batch File
md docs md \docs
Forth
There is no means to create directories in ANS Forth.
s" output.txt" w/o create-file throw ( fileid) drop s" /output.txt" w/o create-file throw ( fileid) drop
Haskell
import System.IO import System.Directory createFile name = do h <- openFile name WriteMode hClose h main = do createFile "output.txt" createDirectory "docs" createFile "/output.txt" createDirectory "/docs"
Java
import java.util.File; public class CreateFileTest { public static String createNewFile(String filename) { try { // Create file if it does not exist boolean success = new File(filename).createNewFile(); if (success) { return " did not exist and was created successfully."; } else { return " already exists."; } } catch (IOException e) { return " could not be created."; } } public static void test(String type, String filename) { System.out.println("The following " + type + " called " + filename + createNewFile(filename) ); } public static void main(String args[]) { test("file", "output.txt"); test("file", File.seperator + "output.txt"); test("directory", "docs"); test("directory", File.seperator + "docs" + File.seperator); } }
MAXScript
-- Here f = createFile "output.txt" close f makeDir (sysInfo.currentDir + "\docs") -- System root f = createFile "\output.txt" close f makeDir ("c:\docs")
Perl
use File::Spec::Functions qw(catfile rootdir); { # here open my $fh, '>', 'output.txt'; mkdir 'docs'; }; { # root dir open my $fh, '>', catfile rootdir, 'output.txt'; mkdir catfile rootdir, 'docs'; };
Without Perl Modules
Current directory
perl -e 'qx(touch output.txt)' perl -e 'mkdir docs'
Root directory
perl -e 'qx(touch /output.txt)' perl -e 'mkdir "/docs"'
Python
Current directory
import os f = open("output.txt", "w") f.close() os.mkdir("docs")
Root directory
f = open("/output.txt", "w") f.close() os.mkdir("/docs")
Exception-safe way to create file:
from __future__ import with_statement import os def create(dir): with open(os.path.join(dir, "output.txt"), "w"): pass os.mkdir(os.path.join(dir, "docs")) create(".") # current directory create("/") # root directory
Tested on Windows. It should work on Linux and possibly on Mac OS X
Raven
"" as str str 'output.txt' write str '/output.txt' write 'docs' mkdir '/docs' mkdir
Smalltalk
Squeak has no notion of 'current directory' because it isn't tied to the shell that created it.
(FileDirectory on: 'c:\') newFileNamed: 'output.txt'; createDirectory: 'docs'.
In GNU Smalltalk you can do instead:
ws := (File name: 'output.txt') writeStream. ws close. Directory create: 'docs'. ws := (File name: '/output.txt') writeStream. ws close. Directory create: '/docs'.
Tcl
Assuming that we're supposed to create two files and two directories (one each here and one each in the file system root) and further assuming that the code is supposed to be portable, i.e. work on win, linux, MacOS (the task is really not clear):
close [open output.txt w] close [open [file nativename /output.txt] w] file mkdir docs file mkdir [file nativename /docs]
Toka
needs shell " output.txt" "W" file.open file.close " /output.txt" "W" file.open file.close ( Create the directories with permissions set to 777) " docs" &777 mkdir " /docs" &777 mkdir
Visual Basic .NET
Platform: .NET
'Current Directory IO.Directory.CreateDirectory("docs") IO.File.Create("output.txt").Close() 'Root IO.Directory.CreateDirectory("\docs") IO.File.Create("\output.txt").Close() 'Root, platform independent IO.Directory.CreateDirectory(IO.Path.DirectorySeparatorChar & "docs") IO.File.Create(IO.Path.DirectorySeparatorChar & "output.txt").Close()
UNIX Shell
touch output.txt touch /output.txt mkdir docs mkdir /docs