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8 total

On This Page:

  1. 1 Batch download code snippets
  2. 2 ANSI terminal color chart
  3. 3 Terminal window commands
  4. 4 backup files
  5. 5 Rewrite SPAM subject line with procmail
  1. 6 JS Regex's for sourcecode
  2. 7 Substrings in Ruby
  3. 8 Publishing raw code

Batch download code snippets

to shell osx mac curl bash unix code web download internet batch ed getopts snippets trap by jvs on Nov 12, 2008
Batch download snippets from http://codesnippets.joyent.com and convert them to text files using man textutil (available on Mac OS X 10.4 or later).

Note: Old snippet versions will be automatically replaced by the downloaded snippets without a backup!

Author: jv
License: The MIT License, Copyright (c) 2008 jv

Usage:
# usage: bds [-p num] [-t tag] [-u user] tag
bds vim
bds -p 1280
bds -u jvs
bds -t plistbuddy
bds -t tar
bds -t ipfw -u jvs




#!/opt/local/bin/bash

# "batch download snippets" from http://codesnippets.joyent.com and
# convert them to text files using man textutil (available on Mac OS X 10.4 or later).
#
# Note: Old snippet versions will be automatically replaced by the downloaded snippets without a backup!
#      An alternative to man textutil is html2text, http://www.mbayer.de/html2text/ (which is available via MacPorts).
#
# Author: jv
# License: The MIT License, http://www.opensource.org/licenses/mit-license.php
# Copyright (c) 2008 jv
#
# cat /usr/local/bin/bds
#
# usage: bds [-p num] [-t tag] [-u user] tag


declare BaseURL='http://codesnippets.joyent.com'
declare download_dir="${HOME}/Desktop/Snippets"

# make sure there is no trailing slash
BaseURL="${BaseURL%/}"
download_dir="${download_dir%/}"

declare BasePostURL="${BaseURL}/posts/show"
declare BaseTagURL="${BaseURL}/tag"
declare BaseUserURL="${BaseURL}/user"

# make sure there is no trailing slash
BasePostURL="${BasePostURL%/}"
BaseTagURL="${BaseTagURL%/}"
BaseUserURL="${BaseUserURL%/}"


# man textutil
declare InputEncoding='utf-8'
declare OutputEncoding='utf-8'

export IFS=$' \t\n'


# function to download a single post specified by a post number: bds -p num
# cf. snippet, http://codesnippets.joyent.com/posts/show/1282

function snippet() {

   declare NL OPWD file outputfile postnum title url

   if [[ "${1//[[:digit:]]/}" != "" ]]; then echo "Argument error. No positive integer: ${1}"; return 1; fi

   postnum="${1}"
   url="${BasePostURL}/${postnum}"
   download_dir="${download_dir}/single-downloads"
   /bin/mkdir -p "${download_dir}"
   OPWD="${PWD}"
   cd "${download_dir}"
   /usr/bin/curl -L -O -s --max-time 25 "${url}" || exit 1    # download snippet web page
   file="${download_dir}/${url##*/}"
   trap '/bin/rm -f "${file}"; exit 0' 0 1 2 13 15

   # get title of downloaded web page
   #title="$(/usr/bin/sed -E -n -e '/<[tT][iI][tT][lL][eE]>/{s/^.*<[tT][iI][tT][lL][eE]>(.*)<\/[tT][iI][tT][lL][eE]>.*$/\1/p;q;}' "${file}" | \
   #         /usr/bin/sed -E -e 's/\[[^][:space:]]*\]//g')"    # delete [xxx] tag elements of title

   title="$(/usr/bin/egrep -m 1 -io '<title>.*</title>' "${file}" | /usr/bin/sed -E -e 's/^<title>[[:space:]]*|[[:space:]]*<\/title>$//g' \
             -e 's/\[[^][:space:]]*\]//g')"    # delete [xxx] tag elements of title


   title="${title//CodeSnippets:/}"
   title="${title//\//:}"
   title="${title// /_}"
   title="${title//[[:cntrl:]]/}"
   title="${title%"${title##*[!_]}"}"   # remove trailing underscores

   if [[ $title == '_CodeDrive_Snippets_courtesy_of_Peter_Coopers_handy_little_app' ]] || [[ -z "$title" ]]; then
      printf "\e[0K\e[31m%s\e[0m:  %s\n" "couldn't access" "${url}"
      /bin/rm "${file}"
      return 1
   fi

   outputfile="${download_dir}/${postnum}_${title}.txt"
   #outputfile="${download_dir}/${title}.txt"  # without post number prefix
   #outputfile="${outputfile//__/_}"  # uniq underscores

   printf "\n\e[0K\e[1;30m%s\e[0m:  %s\n\n" "saved as" "${outputfile}"

   /usr/bin/textutil -output "${outputfile}" -convert txt -inputencoding "${InputEncoding}" -encoding "${OutputEncoding}" "${file}"
   /bin/rm "${file}"

   # escape backslashes
   # man bash 2>/dev/null | less -p 'Each command in a pipeline'
   #outputfile="$(printf "%q" "${outputfile}")"  # cf. help printf
   outputfile="${outputfile//\\/\\\\}"

   NL=$'\\\n'

cat <<EOF | /bin/ed -s "${outputfile}"
H
,g/Snippets is a public source code repository/1,/Snippets is a public source code repository/d
,g/You need to create an account or log in to post comments to this site//You need to create an account or log in to post comments to this site/,\$d
,g|(See related posts)$|s|.See related posts.|${NL}${NL}|
,g|^to.* by.* on .*[[:digit:]]$|s|^to\(.*\) by\(.*\) on \(.*[[:digit:]]\)$|${NL}${NL}Author:\2${NL}Date: \3${NL}URL: ${url}${NL}Tags:\1${NL}|
,g|^Comments on this post$|s|\(Comments on this post\)|${NL}\1:|
,g| posts on .* at |s|\(.* posts on .* at .*\)|${NL}\1:|
w
EOF

# additional ed commands
# delete line numbers
# ,g|^[[:space:]]*[[:digit:]]\{1,\}[[:space:]]\{1,3\}|s|^[[:space:]]*[[:digit:]]\{1,\}[[:space:]]\{1,3\}\(.*\)$|\1|
# delete range of lines
# 4,11d


   cd "${OPWD}"
   return 0

}



#----------------------------------------- end of function snippet



declare pflag tflag uflag
declare cnt count dir_name file no_posts_check NL OPWD outputfile postnum tagsite title url urls website 

if [[ $# -eq 0 ]]; then 
   printf "%s\n%s\n" 'No arguments given!' "Usage: ${0##*/} [-p num] [-t tag] [-u user] tag" 1>&2
   exit 1
fi


while getopts ":p:t:u:" option
do
  case $option in
    p) pflag="$OPTARG" ;;
    t) tflag="$OPTARG" ;;
    u) uflag="$OPTARG" ;;
    [?]) printf "%s\n%s\n" 'Argument error!' "Usage: ${0##*/} [-p num] [-t tag] [-u user] tag" 1>&2; exit 1;;
    *) ;;
  esac
done

shift $(($OPTIND - 1))


if [[ $# -eq 1 ]]; then

   dir_name="${1}"
   tagsite="${BaseTagURL}/${1}"

elif [[ $# -gt 1 ]]; then

   printf "%s\n%s\n" 'Too many arguments!' "Usage: ${0##*/} [-p num] [-t tag] [-u user] tag" 1>&2
   exit 1

elif [[ -n "${pflag}" ]]; then
   snippet "${pflag}"
   exit 0

elif [[ -n "${tflag}" ]] && [[ -n "${uflag}" ]]; then

   dir_name="${tflag}-${uflag}"
   tagsite="${BaseUserURL}/${uflag}/tag/${tflag}"

elif [[ -n "${tflag}" ]]; then

   dir_name="${tflag}"
   tagsite="${BaseTagURL}/${tflag}"

elif [[ -n "${uflag}" ]]; then

   dir_name="${uflag}"
   tagsite="${BaseUserURL}/${uflag}"

else

   printf "%s\n%s\n" 'Argument error!' "Usage: ${0##*/} [-p num] [-t tag] [-u user] tag" 1>&2
   exit 1

fi


tagsite="${tagsite%/}"

#echo $dir_name
#echo $tagsite

count=1
cnt=0
curl_max_time=20
website=''
no_posts_check=''
NL=$'\\\n'
download_dir="${download_dir}/${dir_name//\//:}"
download_dir="${download_dir%/}"
/bin/mkdir -p "${download_dir}"
OPWD="${PWD}"
cd "${download_dir}"

# print download directory
printf "\n\e[0K\e[1;30m%s\e[0m:  %s\n\n" "download directory" "${download_dir}"


while [[ -z "${no_posts_check}" ]]; do

   # download website of the form: 
   # http://somewebsite.com/tag/bash/1,
   # http://somewebsite.com/user/name/1 or 
   # http://somewebsite.com/user/name/tag/bash/1

   website="$(/usr/bin/curl -L -s --max-time $curl_max_time "${tagsite}/${count}" )"

   if [[ $? -ne 0 ]]; then 
      printf "\e[0K\e[31m%s\e[0m:  %s\n" "curl_max_time ${curl_max_time}" "${tagsite}/${count}"
      exit 1
   fi

   #if [[ -n "$(printf "%s" "${website}" | /usr/bin/egrep -o 'Application error \(Apache\)')" ]]; then 
      #no_posts_check='Application error (Apache)'
      #printf "\e[0K\e[31m%s\e[0m:  %s\n" "no further posts" "${no_posts_check}"
   #fi

   if [[ -n "$(printf "%s" "${website}" | /usr/bin/egrep -o '>No posts<')" ]]; then 
      no_posts_check='>No posts<'
      #printf "\e[0K\e[31m%s\e[0m:  %s\n" "no further posts" "${no_posts_check}"
   fi

: <<-'COMMENT'

   # works for Bash 3.0 or later
   if [[ "${website}" =~ '>No posts<' ]]; then 
      no_posts_check="${BASH_REMATCH[0]}"
      #printf "\e[0K\e[31m%s\e[0m:  %s\n" "no further posts" "${no_posts_check}"
   fi

COMMENT


   if [[ -z "${no_posts_check}" ]]; then

      # extract relevant post URLs
      #urls=( $(printf "%s\n" "${website}" | /usr/bin/sed -E -n -e "s|^.* href=\"(/posts/show/[[:digit:]]+)\".*$|${BaseURL}\1|p;g") )
      urls=( $(printf "%s\n" "${website}" | /usr/bin/egrep -o 'href="/posts/show/[[:digit:]]+"' | /usr/bin/sed -E -n -e "s|href=\"(/posts/show/[[:digit:]]+)\"|${BaseURL}\1|p;g") )

      for ((i=0; i < "${#urls[@]}"; i++)); do

         url="${urls[${i}]}"

         postnum="${url##*/}"
         file="${download_dir}/${postnum}"
         trap '/bin/rm -f "${file}"; exit 0' 0 1 2 13 15

         /usr/bin/curl -L -O -s --max-time $curl_max_time "${url}"

         if [[ $? -ne 0 ]]; then 
            printf "\e[0K\e[31m%s\e[0m:  %s\n" "curl_max_time ${curl_max_time}" "${url}"
            continue
         fi
 

         # get title of downloaded web page
         #title="$(/usr/bin/sed -E -n -e '/<[tT][iI][tT][lL][eE]>/{s/^.*<[tT][iI][tT][lL][eE]>(.*)<\/[tT][iI][tT][lL][eE]>.*$/\1/p;q;}' "${file}" | \
         #    /usr/bin/sed -E -e 's/\[[^][:space:]]*\]//g')"    # delete [xxx] tag elements of title

         title="$(/usr/bin/egrep -m 1 -io '<title>.*</title>' "${file}" | /usr/bin/sed -E -e 's/^<title>[[:space:]]*|[[:space:]]*<\/title>$//g' \
                -e 's/\[[^][:space:]]*\]//g')"    # delete [xxx] tag elements of title


         title="${title//CodeSnippets:/}"
         title="${title//\//:}"
         title="${title// /_}"
         title="${title//[[:cntrl:]]/}"
         title="${title%"${title##*[!_]}"}"   # remove trailing underscores

         #printf "%s\n" "${title}"

         if [[ $title == '_CodeDrive_Snippets_courtesy_of_Peter_Coopers_handy_little_app' ]] || [[ -z "$title" ]]; then
            printf "\e[0K\e[31m%s\e[0m:  %s\n" "couldn't access" "${url}"
            /bin/rm "${file}"
            continue
         fi

         outputfile="${download_dir}/${postnum}_${title}.txt"
         #outputfile="${download_dir}/${title}.txt"  # without post number prefix
         #outputfile="${outputfile//__/_}"  # uniq underscores

         let cnt++
         printf "\e[0K\e[1;32m%-6s\e[0m  %s\n" "${cnt}" "${outputfile##*/}"

         /usr/bin/textutil -output "${outputfile}" -convert txt -inputencoding "${InputEncoding}" -encoding "${OutputEncoding}" "${file}"

         /bin/rm "${file}"


         # escape backslashes
         # man bash 2>/dev/null | less -p 'Each command in a pipeline'
         #outputfile="$(printf "%q" "${outputfile}")"  # cf. help printf
         outputfile="${outputfile//\\/\\\\}"

# edit $outputfile in-place with man ed
# first delete lines at the beginning & end,
# then remove the string 'See related posts' and add some newlines with $NL,
# then convert the line 'to...by...on' to line 'Author:...', line 'Date:...', line 'URL:...' and line 'Tags:...'
# and finally the last two ed commands insert two further newlines with $NL

cat <<EOF | /bin/ed -s "${outputfile}"
H
,g/Snippets is a public source code repository/1,/Snippets is a public source code repository/d
,g/You need to create an account or log in to post comments to this site//You need to create an account or log in to post comments to this site/,\$d
,g|(See related posts)$|s|.See related posts.|${NL}${NL}|
,g|^to.* by.* on .*[[:digit:]]$|s|^to\(.*\) by\(.*\) on \(.*[[:digit:]]\)$|${NL}${NL}Author:\2${NL}Date: \3${NL}URL: ${url}${NL}Tags:\1${NL}|
,g|^Comments on this post$|s|\(Comments on this post\)|${NL}\1:|
,g| posts on .* at |s|\(.* posts on .* at .*\)|${NL}\1:|
w
EOF

# additional ed commands
# delete line numbers
# ,g|^[[:space:]]*[[:digit:]]\{1,\}[[:space:]]\{1,3\}|s|^[[:space:]]*[[:digit:]]\{1,\}[[:space:]]\{1,3\}\(.*\)$|\1|
# delete range of lines
# 4,11d


      done  # for

      let count++

   fi

done   # while


   cd "${OPWD}"


exit 0

ANSI terminal color chart

to shell osx mac bash unix code color escape ansi chart by jv on Jun 02, 2008
1.
#!/bin/bash
#
#   This file echoes a bunch of color codes to the 
#   terminal to demonstrate what's available.  Each 
#   line is the color code of one forground color,
#   out of 17 (default + 16 escapes), followed by a 
#   test use of that color on all nine background 
#   colors (default + 8 escapes).
#
#   Author: Giles Orr
#   URL: http://gilesorr.com/bashprompt/howto/c350.html
#   License: GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation;
#            http://gilesorr.com/bashprompt/howto/a1004.html


T='gYw'   # The test text

echo -e "\n                 40m     41m     42m     43m\
     44m     45m     46m     47m";

for FGs in '    m' '   1m' '  30m' '1;30m' '  31m' '1;31m' '  32m' \
           '1;32m' '  33m' '1;33m' '  34m' '1;34m' '  35m' '1;35m' \
           '  36m' '1;36m' '  37m' '1;37m';
  do FG=${FGs// /}
  echo -en " $FGs \033[$FG  $T  "
  for BG in 40m 41m 42m 43m 44m 45m 46m 47m;
    do echo -en "$EINS \033[$FG\033[$BG  $T  \033[0m";
  done
  echo;
done
echo

2.
#!/bin/sh
#
#  colors v1.03
#
#  A simple shell script to output an ANSI terminal color chart.
#  It may be useful when trying to customize your ANSI terminal
#  color scheme!
#
#  Written and placed in the public domain by Ian Abbott <ian@abbott.org>
#
#  ANSI terminal color chart generator
#  Author: Ian Abbott
#  License: BSD License, http://www.opensource.org/licenses/bsd-license.php
#  URL: http://www.snippetcenter.org/de/ansi-terminal-color-chart-generator-s1346.aspx

for h in 0 1; do
  echo -e "\\033[0;${h}m\\c"
  case $h in
  0) echo -e "Normal\\c" ;;
  1) echo -e "High\\c" ;;
  esac
  echo -e " intensity foreground (background color in parentheses)\\033[m"
  for f in 0 1 2 3 4 5 6 7; do
    for b in 0 1 2 3 4 5 6 7 8; do
      echo -e "\\033[${h};3${f}\\c"
      if [ $b -lt 8 ]; then
        echo -e ";4${b}m\\c"
      else
        echo -e "m\\c"
      fi
      case $f in
      0) echo -e " BLACK \\c" ;;
      1) echo -e "  RED  \\c" ;;
      2) echo -e " GREEN \\c" ;;
      3) echo -e " YELLOW\\c" ;;
      4) echo -e "  BLUE \\c" ;;
      5) echo -e "MAGENTA\\c" ;;
      6) echo -e "  CYAN \\c" ;;
      7) echo -e " WHITE \\c" ;;
      esac
      case $b in
      8) echo -e "\\033[m" ;;
      *) echo -e " \\033[m \\c" ;;
      esac
    done
  done
  echo -e "\\033[${h}m\\c"
  for b in 0 1 2 3 4 5 6 7 8; do
    case $b in
    0) echo -e "(black)  \\c" ;;
    1) echo -e " (red)   \\c" ;;
    2) echo -e "(green)  \\c" ;;
    3) echo -e "(yellow) \\c" ;;
    4) echo -e " (blue)  \\c" ;;
    5) echo -e "(magenta)\\c" ;;
    6) echo -e " (cyan)  \\c" ;;
    7) echo -e "(white)  \\c" ;;
    8) echo -e " (none)\\c" ;;
    esac
  done
  echo -e "\\033[m\\n"
done

Terminal window commands

to shell osx mac bash unix code osascript text window terminal color title bar escape background ansi by jv on Jun 01, 2008 
# Inspired by: 
# - Re-size and Move with Escape Sequences, http://www.osxfaq.com/tips/unix-tricks/week99/monday.ws
# - Define Aliases and Functions, http://www.osxfaq.com/tips/unix-tricks/week99/tuesday.ws
# - Focus and Dock with Escape Sequences, http://www.osxfaq.com/Tips/unix-tricks/week99/wednesday.ws
# Author: Adrian Mayo, http://101.1dot1.com and http://www.peachpit.com/title/0321374118
# also see: http://en.wikipedia.org/wiki/ANSI_escape_code

function title() { if [[ $# -eq 1 && -n "$@" ]]; then printf "\e]0;${@}\a"; fi; return 0; }  
function title() { if [[ -n "$@" ]]; then printf "\033]0;${1}\007"; fi; return 0; }
function docktw() { printf "\e[2t"; return 0; }
function docktw() { printf "\e[2t"; sleep 5; printf "\e[5t"; return 0; }
function bgtw() { printf "\e[6t"; return 0; }
function bgtw() { printf "\e[6t"; sleep 5; printf "\e[5t"; return 0; }    # background the Terminal window

title 'Hello, world!'
docktw
bgtw


# positive integer test (including zero)
function positive_int() { return $(test "$@" -eq "$@" > /dev/null 2>&1 && test "$@" -ge 0 > /dev/null 2>&1); }

# move the Terminal window
function mvtw() { 
   if [[ $# -eq 2 ]] && $(positive_int "$1") && $(positive_int "$2"); then 
      printf "\e[3;${1};${2};t"
      return 0
   fi
   return 1
}


# resize the Terminal window
function sizetw() { 
   if [[ $# -eq 2 ]] && $(positive_int "$1") && $(positive_int "$2"); then 
      printf "\e[8;${1};${2};t"
      /usr/bin/clear
      return 0
   fi
   return 1
}


# full screen
function fscreen() { printf "\e[3;0;0;t\e[8;0;0t"; /usr/bin/clear; return 0; }

# default screen
function dscreen() { printf "\e[8;35;150;t"; printf "\e[3;300;240;t"; /usr/bin/clear; return 0; }

# max columns
function maxc() { printf "\e[3;0;0;t\e[8;50;0t"; /usr/bin/clear; return 0; }

# max rows
function maxr() { printf "\e[3;0;0;t\e[8;0;100t"; /usr/bin/clear; return 0; }

# show number of lines & columns
function lc() { printf "lines: $(/usr/bin/tput lines)\ncolums: $(/usr/bin/tput cols)\n"; return 0; }

# move cursor
function mvc() { 
   if [[ $# -eq 2 ]] && $(positive_int "$1") && $(positive_int "$2"); then 
      /usr/bin/tput cup "$1" "$2"
      /usr/bin/tput el  # clear to end of line
      #/usr/bin/tput ed
      return 0
   fi
   return 1

}


# wrap lines according to the number of columns of the Terminal window
function wraptw() { 
   declare str var=$(/usr/bin/tput cols)
   if [[ -s /dev/stdin ]]; then str="$(</dev/stdin)"; else str="$@"; fi 
   printf "%s\n" "$str" | /usr/bin/fmt -w $var
   #printf "%s\n" "$str" | /usr/bin/fold -w $(/usr/bin/tput cols)
   return 0
}


long_line="$(/usr/bin/jot -b 'This is a test sentence!' 100 | /usr/bin/tr '\n' ' ')"
printf "%s\n" "$long_line" | wraptw

lc
mvtw 0 0
mvtw 0 300
mvtw 300 300
mvtw 80 140
fscreen
dscreen
maxc
maxr

lc
sizetw 0 0
sizetw 0 50
sizetw 1 50
sizetw 50 50
sizetw 50 500
sizetw 50 150

mvc 2 45
mvc 100 23
mvc 99 3

dscreen


#-----------------------------------------------------


# customize the Terminal window's title bar text

# show the current date as title bar text
declare -x PROMPT_COMMAND='printf "\e]0; $(/bin/date)\a"'   
declare -x PROMPT_COMMAND='printf "\e]0;$(/bin/date "+%a %b %e   %H:%M:%S ")\a"'
declare -x PROMPT_COMMAND='printf "\e]0;$(/bin/date "+%Y-%m-%d   %H:%M:%S ")\a"'

# show current working directory 
declare -x PROMPT_COMMAND='printf "\e]0;$(/bin/pwd) \a"'
declare -x PROMPT_COMMAND='printf "\e]0;$(/bin/pwd | /usr/bin/tr -d "[[:cntrl:]]") \a"'

# show OLDPWD 
declare -x PROMPT_COMMAND='printf "\e]0;$(printf %s "$OLDPWD") \a"'
declare -x PROMPT_COMMAND='printf "\e]0;$(printf %s "$OLDPWD" | /usr/bin/cut -c 1-100) \a"'

export -p | grep -i PROMPT_COMMAND
env | grep -i PROMPT_COMMAND
unset -v PROMPT_COMMAND


# first create environment variable TITLE 
# cf. Prompt Commands, http://www.osxfaq.com/Tips/unix-tricks/week71/wednesday.ws
# Author: Adrian Mayo, http://101.1dot1.com and http://www.peachpit.com/title/0321374118

unset -v TITLE PROMPT_COMMAND
declare -x TITLE="Terminal"
declare -x PROMPT_COMMAND='printf "\e]0;${TITLE}\a"'

# message as title bar text
function message_title() { 
   if [[ $# -eq 1 && -n "$@" ]]; then 
      #TITLE="$@"
      TITLE="$(printf %s "$@" | /usr/bin/cut -c 1-100)"
   fi
   return 0
}

export -f message_title
export -p | grep -i message_title
env | grep -i message_title
#unset -f message_title 

message_title 'Hello, world!'


# show OS information in title bar
function osinfo() { 
   x1="$(/usr/bin/sw_vers -productName)"
   x2="$(/usr/bin/sw_vers -productVersion)"
   x3="$(/usr/bin/sw_vers -buildVersion)"
   x4="$(/usr/bin/arch)"
   TITLE="${x1} - ${x2} - ${x3} - ${x4}"
   return 0
}

export -f osinfo
osinfo


function eval_title() { 
   if [[ -n "$(printf %s "$@") | /usr/bin/egrep '^date|whoami|logname|uname|machine|pwd|hostname$'" ]]; then 
      cmd_output="$(eval "$@")"
      TITLE="$cmd_output"
   fi
   return 0
}
export -f eval_title

eval_title "date"
eval_title "whoami"
eval_title "logname"
eval_title "uname"
eval_title "machine"
eval_title "pwd"
eval_title "hostname"


function date_title() { TITLE="$(/bin/date "+%Y-%m-%d")"; return 0; }
export -f date_title
date_title

function logname_title() { TITLE="$(/usr/bin/logname)"; return 0; }
export -f logname_title
logname_title


# show last command in title bar
help fc
unset -v TITLE PROMPT_COMMAND
declare -x PROMPT_COMMAND='printf %b "\e]0;$(fc -ln | tail -n 1 | cut -c 2-150 | tr -d "\\")\a"'


# show current command in title bar
help history
unset -v TITLE PROMPT_COMMAND
declare -x PROMPT_COMMAND='printf %b "\e]0;$(history 1 | /usr/bin/cut -c 8-150 | tr -d "\\")\a"'
declare -x PROMPT_COMMAND='printf %b "\e]0;$(history 1 | sed -E "s/^[[:space:]]*[[:digit:]]+[[:space:]]+(.*)$/\\1/" | cut -c 1-150 | tr -d "\\")\a"'


#-----------------------------------------------------


# increase font size
function ifont() { 
/usr/bin/osascript <<__END__
    tell application "System Events" to tell process "Terminal" to keystroke "+" using command down
__END__
  return 0 
}

ifont


# decrease font size
function dfont() { 
/usr/bin/osascript <<__END__
    tell application "System Events" to tell process "Terminal" to keystroke "-" using command down
__END__
  return 0 
}

dfont


# hide all Terminal windows
function hideall() { 
   /usr/bin/osascript -e 'tell application "System Events" to set visible of some item of ( get processes whose name = "Terminal" ) to false'
   return 0
}

hideall


# create a new Terminal window and cd to the same current working directory
# cf. http://justinfrench.com/index.php?id=231

unset -f newin

function newin() {
   /bin/pwd | /usr/bin/pbcopy
   /usr/bin/open -a Terminal
   /usr/bin/osascript -e 'tell application "Terminal" to do script with command "cd \"$(/usr/bin/pbpaste)\"; echo \" \" | /usr/bin/pbcopy; /usr/bin/clear"'
   return 0 
}

cd ~/Desktop
newin

backup files

to date shell bash backup script code by hostmaster on Dec 19, 2007
// create backup copy

#!/bin/bash

filename=$1
date=`date +%Y%m%d`

usage () {
        echo "Usage: `basename $0` filename"
}

if [ -z "$filename" -a ! -f "$filename" ]; then
        usage
        exit 1
fi

rev=0
backup="$filename.$date.$rev"

while [ -f $backup ]; do
        let rev+=1
        backup="$filename.$date.$rev"
done

cp $filename $backup
exit $?

Rewrite SPAM subject line with procmail

to email code procmail filter by tomson on Nov 21, 2007
// Remove textdrive's ***SPAM*** addition
// by phearlez
// http://discuss.joyent.com/viewtopic.php?pid=154695#p154695

# Remove the word ***SPAM*** from SpamAssassin's subject line re-write

 :0 fHw
 * ^Subject: \*\*\*SPAM\*\*\*
 | sed -e 's/\*\*\*SPAM\*\*\*//g'

JS Regex's for sourcecode

to regex code js by metafeather on Oct 25, 2007
Extracted from SyntaxHilighter

	MultiLineCComments : new RegExp('/\\*[\\s\\S]*?\\*/', 'gm'),
	SingleLineCComments : new RegExp('//.*$', 'gm'),
	SingleLinePerlComments : new RegExp('#.*$', 'gm'),
	DoubleQuotedString : new RegExp('"(?:\\.|(\\\\\\")|[^\\""\\n])*"','g'),
	SingleQuotedString : new RegExp("'(?:\\.|(\\\\\\')|[^\\''\\n])*'", 'g')

Substrings in Ruby

to ruby code string letter substring by minofare on Aug 20, 2007
The other day I was wondering why some really simple Ruby code of mine wasn’t working. The code under test looked something like this:

    def find_directories
        directories = []
        entries = `ls -l`.split/\n/  # get long-format directory listing
        entries.shift   # toss away the totals line
        entries.each do |entry|
            is_directory = (entry[0] == 'd')  # is it a directory?
            directories &lt;&lt; dir if is_directory
        end
        directories
    end

I figured that my ls -l.split/\n/ trickery wasn’t working. So I fired up irb and tried it manually. It worked fine.
Then I sprinkled a few puts statements throughout. entries was fine, and each entry was perfect, looking something like this:
drwx------ 24 jcohen jcohen 816 Aug 19 11:04 Documents

I couldn’t figure out what was wrong. All I had to do was look at the first character of entry; if it was a ‘d’, then I knew I had a directory. But for some reason, is_directory was always false. I googled, checked the RDocs for the String class, thumbed through the PickAxe, and something I read triggered one of those ah-ha moments.
Rats: My C# brain is still alive and kicking.

To confirm my fears, I fired up irb again:

irb> s = "Jeff" 
=> "Jeff" 
irb> s[0]
=> 74

That’s right, folks: on a string, the bracket syntax – when given only one parameter – will return the ASCII value of the character inside. Not the actual character, as it will in C#.
To correctly grab a one-character substring from a string, you have to supply two parameters:

irb> s[0,1]
=> "J"

Publishing raw code

to code raw by johnt on Oct 18, 2005
Here is how to add code to a blog post in a way that you can see the code...so you can show the actual raw code without it actually working.

&lt;strong&gt;hello&lt;/strong&gt;


Just incase the head and tail in the code tags.

This is handy, I can keep this code here, as I was always searching for where I kept this handy info...now I have a place where I can quickly find all my code, and better still I'm sharing it by default.
8 total

On This Page:

  1. 1 Batch download code snippets
  2. 2 ANSI terminal color chart
  3. 3 Terminal window commands
  4. 4 backup files
  5. 5 Rewrite SPAM subject line with procmail
  1. 6 JS Regex's for sourcecode
  2. 7 Substrings in Ruby
  3. 8 Publishing raw code