Take notes on the command line
You are encouraged to solve this task according to the task description, using any language you may know.
Take notes on command line
NOTES.CMD is a commandline tool written as a Batch file. The task is to implement the same in your language.
Invoking NOTES without commandline arguments displays the current contents of the local NOTES.TXT if it exists. If NOTES has arguments, the current date and time are appended to the local NOTES.TXT followed by a newline. Then all the arguments, joined with spaces, prepended with a tab, and appended with a trailing newline, are written to NOTES.TXT.
AutoHotkey
<lang autohotkey>Notes := "Notes.txt"
If 0 = 0 ; no arguments {
If FileExist(Notes) { FileRead, Content, %Notes% MsgBox, %Content% } Else MsgBox, %Notes% does not exist Goto, EOF
}
- date and time, colon, newline (CRLF), tab
Date := A_DD "/" A_MM "/" A_YYYY Time := A_Hour ":" A_Min ":" A_Sec "." A_MSec FileAppend, %Date% %Time%:`r`n%A_Tab%, %Notes%
- command line parameters, trailing newline (CRLF)
Loop, %0%
FileAppend, % %A_Index% " ", %Notes%
FileAppend, `r`n, %Notes%
EOF:</lang>
Batch File
<lang dos>@echo off if %1@==@ (
if exist notes.txt more notes.txt goto :eof
) echo %date% %time%:>>notes.txt echo %*>>notes.txt</lang>
C
<lang c>#include <stdio.h>
- include <time.h>
- define note_file "NOTES.TXT"
int main(int argc, char**argv) { FILE *note; time_t timer; int i; char ch;
if(argc==1) { //Read NOTES.TXT and print it note = fopen(note_file, "r"); if(note!=NULL) { while((ch=getc(note))!=EOF) putchar(ch); } } else { //Write date & time to NOTES.TXT, and then arguments note = fopen(note_file, "a"); if(note!=NULL) { timer = time(NULL); fprintf(note,"%s",asctime(localtime(&timer))); putc('\t', note); for(i=1;i<argc;i++) fprintf(note, "%s ", argv[i]); putc('\n', note); } }
if(note!=NULL) fclose(note); return 0; } </lang>
C++
<lang cpp>#include <fstream>
- include <iostream>
- include <ctime>
using namespace std;
- define note_file "NOTES.TXT"
int main(int argc, char **argv) { if(argc>1) { ofstream Notes(note_file, ios::app); time_t timer = time(NULL); if(Notes.is_open()) { Notes << asctime(localtime(&timer)) << '\t'; for(int i=1;i<argc;i++) Notes << argv[i] << ' '; Notes << endl; Notes.close(); } } else { ifstream Notes(note_file, ios::in); string line; if(Notes.is_open()) { while(!Notes.eof()) { getline(Notes, line); cout << line << endl; } Notes.close(); } } }</lang>
Factor
<lang factor>#! /usr/bin/env factor USING: kernel calendar calendar.format io io.encodings.utf8 io.files sequences command-line namespaces ;
command-line get [
"notes.txt" utf8 file-contents print
] [
" " join "\t" prepend "notes.txt" utf8 [ now timestamp>ymdhms print print flush ] with-file-appender
] if-empty</lang>
Haskell
<lang haskell>import System.Environment (getArgs) import System.Time (getClockTime)
main :: IO () main = do
args <- getArgs if null args then catch (readFile "notes.txt" >>= putStr) (\_ -> return ()) else do ct <- getClockTime appendFile "notes.txt" $ show ct ++ "\n\t" ++ unwords args ++ "\n"</lang>
Sample output after a few runs:
Thu Apr 22 19:01:41 PDT 2010 Test line 1. Thu Apr 22 19:01:45 PDT 2010 Test line 2.
Java
<lang java>import java.io.*; import java.nio.channels.*; import java.util.Date;
public class TakeNotes {
public static void main(String[] args) throws IOException { if (args.length > 0) { PrintStream ps = new PrintStream(new FileOutputStream("notes.txt", true)); ps.println(new Date()); ps.print("\t" + args[0]); for (int i = 1; i < args.length; i++) ps.print(" " + args[i]); ps.println(); ps.close(); } else { FileChannel fc = new FileInputStream("notes.txt").getChannel(); fc.transferTo(0, fc.size(), Channels.newChannel(System.out)); fc.close(); } }
}</lang>
JavaScript
<lang javascript>var notes = 'NOTES.TXT';
var args = WScript.Arguments; var fso = new ActiveXObject("Scripting.FileSystemObject"); var ForReading = 1, ForWriting = 2, ForAppending = 8;
if (args.length == 0) {
if (fso.FileExists(notes)) { var f = fso.OpenTextFile(notes, ForReading); WScript.Echo(f.ReadAll()); f.Close(); }
} else {
var f = fso.OpenTextFile(notes, ForAppending, true); var d = new Date(); f.WriteLine(d.toLocaleString()); f.Write("\t"); // note that WScript.Arguments is not an array, it is a "collection" // it does not have a join() method. for (var i = 0; i < args.length; i++) { f.Write(args(i) + " "); } f.WriteLine(); f.Close();
}</lang>
> del NOTES.TXT > cscript /nologo notes.js > cscript /nologo notes.js this is the first note > cscript /nologo notes.js April 1, 2010 5:18:38 PM this is the first note
OCaml
<lang ocaml>#! /usr/bin/env ocaml
- load "unix.cma"
let notes_file = "notes.txt"
let take_notes() =
let gmt = Unix.gmtime (Unix.time()) in let date = Printf.sprintf "%d-%02d-%02d %02d:%02d:%02d" (1900 + gmt.Unix.tm_year) (1 + gmt.Unix.tm_mon) gmt.Unix.tm_mday gmt.Unix.tm_hour gmt.Unix.tm_min gmt.Unix.tm_sec in let oc = open_out_gen [Open_append; Open_creat; Open_text] 0o644 notes_file in output_string oc (date ^ "\t"); output_string oc (String.concat " " (List.tl(Array.to_list Sys.argv))); output_string oc "\n";
let dump_notes() =
if not(Sys.file_exists notes_file) then (prerr_endline "no local notes found"; exit 1); let ic = open_in notes_file in try while true do print_endline (input_line ic) done with End_of_file -> ()
let () =
if Array.length Sys.argv = 1 then dump_notes() else take_notes()</lang>
Oz
<lang oz>functor import
Application Open OS System
define
fun {TimeStamp} N = {OS.localTime} in (1900+N.year)#"-"#(1+N.mon)#"-"#N.mDay#", "#N.hour#":"#N.min#":"#N.sec end
fun {Join X|Xr Sep} {FoldL Xr fun {$ Z X} Z#Sep#X end X} end case {Application.getArgs plain} of nil then try F = {New Open.file init(name:"notes.txt")} in {System.printInfo {F read(list:$ size:all)}} {F close} catch _ then skip end [] Args then F = {New Open.file init(name:"notes.txt" flags:[write text create append])} in {F write(vs:{TimeStamp}#"\n")} {F write(vs:"\t"#{Join Args " "}#"\n")} {F close} end {Application.exit 0}
end</lang>
Perl
<lang Perl>my $file = 'notes.txt'; if ( @ARGV ) {
open NOTES, '>>', $file or die "Can't append to file $file: $!"; print NOTES scalar localtime, "\n\t@ARGV\n";
} else {
open NOTES, '<', $file or die "Can't read file $file: $!"; print <NOTES>;
} close NOTES;</lang>
Sample output after a few runs:
Thu Apr 22 19:01:41 2010 Test line 1. Thu Apr 22 19:01:45 2010 Test line 2.
PicoLisp
<lang PicoLisp>#!/usr/bin/picolisp /usr/lib/picolisp/lib.l
(load "@lib/misc.l") (if (argv)
(out "+notes.txt" (prinl (stamp) "^J^I" (glue " " @))) (and (info "notes.txt") (in "notes.txt" (echo))) )
(bye)</lang>
PowerShell
<lang powershell>$notes = "notes.txt" if (($args).length -eq 0) {
if(Test-Path $notes) { Get-Content $notes }
} else {
Get-Date | Add-Content $notes "`t" + $args -join " " | Add-Content $notes
}</lang>
PureBasic
<lang PureBasic>#FileName="notes.txt" Define argc=CountProgramParameters() If OpenConsole()
If argc=0 If ReadFile(0,#FileName) While Eof(0)=0 PrintN(ReadString(0)) ; No new notes, so present the old Wend CloseFile(0) EndIf Else ; e.g. we have some arguments Define d$=FormatDate("%yyyy-%mm-%dd %hh:%ii:%ss",date()) If OpenFile(0,#FileName) Define args$="" While argc args$+" "+ProgramParameter() ; Read all arguments argc-1 Wend FileSeek(0,Lof(0)) ; Go to the end of this file WriteStringN(0,d$+#CRLF$+#TAB$+args$) ; Append date & note CloseFile(0) EndIf EndIf
EndIf</lang>
Python
<lang python>import sys, datetime
- sys.argv[1:] = 'go for it'.split()
if len(sys.argv) == 1:
try: f = open('notes.txt', 'r') sys.stdout.write(f.read()) f.close() except IOError: pass
else:
f = open('notes.txt', 'a') f.write(datetime.datetime.now().isoformat() + '\n') f.write("\t%s\n" % ' '.join(sys.argv[1:])) f.close()</lang>
Sample notes.txt file
After assorted runs:
2010-04-01T17:06:20.312000 go for it 2010-04-01T17:08:20.718000 go for it
Ruby
<lang ruby>notes = 'NOTES.TXT' if ARGV.empty?
File.copy_stream(notes, $stdout) rescue nil
else
File.open(notes, 'a') {|file| file.puts "%s\n\t%s" % [Time.now, ARGV.join(' ')]}
end</lang>
SNOBOL4
<lang snobol>#! /usr/local/bin/snobol4 -b a = 2 ;* skip '-b' parameter notefile = "notes.txt" while args = args host(2,a = a + 1) " " :s(while) ident(args) :f(append) noparms input(.notes,io_findunit(),,notefile) :s(display)f(end) display output = notes :s(display) endfile(notes) :(end) append output(.notes,io_findunit(),"A",notefile) :f(end) notes = date() notes = char(9) args end</lang>
Tcl
<lang tcl># Make it easier to change the name of the notes file set notefile notes.txt
if {$argc} {
# Write a message to the file set msg [clock format [clock seconds]]\n\t[join $argv " "] set f [open $notefile a] puts $f $msg close $f
} else {
# Print the contents of the file catch {
set f [open $notefile] fcopy $f stdout close $f
}
}</lang> Sample output after a few runs:
Thu Apr 01 19:28:07 BST 2010 test 1 two three Thu Apr 01 19:28:49 BST 2010 TODO: Submit notes.tcl to Rosetta Code
UNIX Shell
Bash version <lang bash># NOTES=$HOME/notes.txt if $# -eq 0 ; then
-r $NOTES && more $NOTES
else
date >> $NOTES echo " $*" >> $NOTES
fi</lang>
"Spoiled Bash kid" version <lang bash>N=~/notes.txt;$# -gt 0 && { date ; echo " $*"; exit 0; } >> $N || -r $N && cat $N</lang>
Portable version
<lang shell>NOTES=$HOME/notes.txt
if test "x$*" = "x"
then
if test -r $NOTES then more $NOTES fi
else
date >> $NOTES echo " $*" >> $NOTES
fi</lang>