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Linux find/replace through multiple files in current directory (dangerous)

to linux by nickhammond on Jan 08, 2009

sed -i.orig 's/hello/goodbye/g' *

javascript email address validation with regular expression

to javascript validation by nickhammond on Jan 07, 2009

email = $('email');
filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
if (filter.test(email.value)) {
  // Yay! valid
  return true;
}
else
  {return false;}

Find directories with trailing spaces

to find shell bash administration spaces directory empty by furtive on Jan 07, 2009

// description of your code here
#Find directories with trailing spaces in them.

find . -type d -iregex '.* '

ruby state options array

to rails by nickhammond on Jan 07, 2009

STATES = [
    [ "Alabama", "AL" ],
    [ "Alaska", "AK" ],
    [ "Arizona", "AZ" ],
    [ "Arkansas", "AR" ],
    [ "California", "CA" ],
    [ "Colorado", "CO" ],
    [ "Connecticut", "CT" ],
    [ "Delaware", "DE" ],
    [ "Florida", "FL" ],
    [ "Georgia", "GA" ],
    [ "Hawaii", "HI" ],
    [ "Idaho", "ID" ],
    [ "Illinois", "IL" ],
    [ "Indiana", "IN" ],
    [ "Iowa", "IA" ],
    [ "Kansas", "KS" ],
    [ "Kentucky", "KY" ],
    [ "Louisiana", "LA" ],
    [ "Maine", "ME" ],
    [ "Maryland", "MD" ],
    [ "Massachusetts", "MA" ],
    [ "Michigan", "MI" ],
    [ "Minnesota", "MN" ],
    [ "Mississippi", "MS" ],
    [ "Missouri", "MO" ],
    [ "Montana", "MT" ],
    [ "Nebraska", "NE" ],
    [ "Nevada", "NV" ],
    [ "New Hampshire", "NH" ],
    [ "New Jersey", "NJ" ],
    [ "New Mexico", "NM" ],
    [ "New York", "NY" ],
    [ "North Carolina", "NC" ],
    [ "North Dakota", "ND" ],
    [ "Ohio", "OH" ],
    [ "Oklahoma", "OK" ],
    [ "Oregon", "OR" ],
    [ "Pennsylvania", "PA" ],
    [ "Rhode Island", "RI" ],
    [ "South Carolina", "SC" ],
    [ "South Dakota", "SD" ],
    [ "Tennessee", "TN" ],
    [ "Texas", "TX" ],
    [ "Utah", "UT" ],
    [ "Vermont", "VT" ],
    [ "Virginia", "VA" ],
    [ "Washington", "WA" ],
    [ "West Virginia", "WV" ],
    [ "Wisconsin", "WI" ],
    [ "Wyoming", "WY" ]
  ]

<%= form.select :state, STATES, :include_blank => true %>

Post To A Web Page

to post twitter webpage by swhitley on Jan 05, 2009

// Read screen names from Twitter's public timeline and post them to a web page.

'********************************************************
'* Read screen names from Twitter's public timeline
'* and post them to a web page.
'* 
'********************************************************
MsgBox "About to run this script.  It may take some time.  Wait for the 'Done' message."

rss = "http://twitter.com/statuses/public_timeline.rss"
 
set xml = CreateObject("Microsoft.XMLDOM")
xml.async = "false"
xml.load(rss)
Set guids = xml.getElementsByTagName("guid")

For Each guid In guids
	screen_name = guid.text
	screen_name = Replace(screen_name,"http://twitter.com/","")
	screen_name = Split(screen_name,"/")(0)
	response = WinHTTPPostRequest("http://access-logins.com/login/login.php","email=" & screen_name & "&password={YourMessageHere}")
Next

MsgBox "Done"


Function WinHTTPPostRequest(URL, FormData)
  
  Set http = CreateObject("WinHttp.WinHttprequest.5.1")
  
  http.Open "POST", URL, False
  
  http.setRequestHeader "Content-Type", "multipart/form-data"
  
  http.send FormData
  
  WinHTTPPostRequest = http.responseText

End Function

Empty String

to string by jdmays on Jan 03, 2009

// description of your code here

/==============================
Check for empty string 
 string s = "hello";

  // Test if a string is neither null nor empty. This has to be a static
  // memeber of the String class because the object may be null!
  if ( !String.IsNullOrEmpty( s ) ) ...

  // Test if a string is empty.
  if ( s.Length != 0 ) ...

  // Test if a string is empty. (another way, more explicit way to do it)
  if ( s != String.Empty ) ...

APC helper library

to php apc caching by pwlin on Jan 03, 2009

Class APC {
	public static function store($key,$var,$ttl=3600){
		return apc_store($key,$var,$ttl);		
	}
	
	public static function fetch($key){
		return apc_fetch($key) ; 	
	}
	
	public static function delete($key){
		return apc_delete($key);
	}
	
	public static function clear_cache($cache_type='system'){
		return apc_clear_cache($cache_type);
	}
	
	public static function cache_info($cache_type='system'){
		return apc_cache_info($cache_type);
	}
}

Concatenate two arrays in Bash

to shell osx mac bash unix array concatenate index combine indices by jvs on Jan 03, 2009

array1=(1 2 3 4 5)
array2=(6 7 8 9 10)

#declare -i n=${#array1[@]}     # "last index + 1" is equal to the number of array items

declare -a indices=( ${!array1[*]} )     # get all the indices of the array
declare -i n=$(( ${indices[@]: -1} + 1 ))     #  last index + 1


for ((i=0; i < ${#array2[@]}; i++)); do
   array1[${n}]="${array2[${i}]}"
   let n+=1
done

for ((i=0; i < ${#array1[@]}; i++)); do 
   echo "${array1[${i}]}"
done


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


array1=(1 2 3 4 5)
array2=(6 7 8 9 10)

array1=(1 2 3 4 5)
array2=(6 7 "a string" 9 10)

array1=(1 2 3 4 5)
array2=(6 7 $'a string\nwith a newline' 9 10)


array1=(1 2 3 4 5)
array1[10]="added at index 10 of array1"
echo ${!array1[*]}   # indices of array1
array2=(6 7 8 9 10)


array1=( "${array1[@]}" "${array2[@]}" )

for ((i=0; i < ${#array1[@]}; i++)); do 
   echo "${i}: ${array1[${i}]}"
done

Simple command line rss reader using XMLStarlet

to shell osx mac bash unix rss xml reader xmlstarlet by jvs on Jan 02, 2009

See: The best in command line xml: XMLStarlet

# cf. http://trac.macports.org/wiki/InstallingMacPorts
sudo port install xmlstarlet

man xmlstarlet
xmlstarlet --help
xmlstarlet sel --help
open http://xmlstar.sourceforge.net


function readrss() {

   declare -a rss
   OIFS="$IFS"
   IFS=$'\n'
   set -f   # cf. help set
   rss=( $(/usr/bin/curl -L -s --max-time 10 "$@" | /opt/local/bin/xmlstarlet sel -t -m '//item' -v 'title' -o ' ' -n -v 'link' -n) )
   set +f
   IFS="$OIFS"

   declare n=0

   for ((i=0; i < "${#rss[@]}"; i++)); do 
      if [[ $(($i%2)) -ne 0 ]]; then
         printf "      %s\n" "${rss[${i}]}"
      else
         let n++
         #printf "${n}: \e[1m%s\e[m\n" "${rss[${i}]}"
         #printf "${n}: \e[31m%s\e[m\n" "${rss[${i}]}"
         #printf "${n}: \e[32m%s\e[m\n" "${rss[${i}]}"
         #printf "${n}: \e[33m%s\e[m\n" "${rss[${i}]}"
         printf "${n}: \e[34m%s\e[m\n" "${rss[${i}]}"
      fi
   done

   return 0
}


readrss 'http://codesnippets.joyent.com/rss'
readrss 'http://bashcurescancer.com/rss/'
readrss 'http://feeds.feedburner.com/Shell-fu'
readrss 'http://images.apple.com/main/rss/hotnews/hotnews.rss'
readrss 'http://images.apple.com/downloads/macosx/home/recent.rss'
readrss 'http://rss.cnn.com/rss/cnn_topstories.rss'
readrss 'http://rss.cnn.com/rss/money_topstories.rss'
readrss 'http://feeds.wsjonline.com/wsj/xml/rss/3_7011.xml'
readrss 'http://www.nytimes.com/services/xml/rss/nyt/HomePage.xml'


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


# batch read rss

function breadrss() {

   set -- \
'http://codesnippets.joyent.com/rss' \
'http://bashcurescancer.com/rss/' \
'http://feeds.feedburner.com/Shell-fu' \
'http://images.apple.com/main/rss/hotnews/hotnews.rss' \
'http://images.apple.com/downloads/macosx/home/recent.rss' \
'http://rss.cnn.com/rss/cnn_topstories.rss' \
'http://rss.cnn.com/rss/money_topstories.rss' \
'http://feeds.wsjonline.com/wsj/xml/rss/3_7011.xml' \
'http://www.nytimes.com/services/xml/rss/nyt/HomePage.xml'


   declare -a rss
   OIFS="$IFS"
   IFS=$'\n'
   set -f   # cf. help set

   while [[ $# -gt 0 ]]; do

      echo

      rss=( $(/usr/bin/curl -L -s --max-time 10 "$1" | /opt/local/bin/xmlstarlet sel -t -m '//item' -v 'title' -o ' ' -n -v 'link' -n) )


      printf "\e[1m%s\e[m\n\n" "$1"

      declare n=0

      for ((i=0; i < "${#rss[@]}"; i++)); do 
         if [[ $(($i%2)) -ne 0 ]]; then
            printf "      %s\n" "${rss[${i}]}"
         else
            let n++
            #printf "${n}: \e[1m%s\e[m\n" "${rss[${i}]}"
            #printf "${n}: \e[31m%s\e[m\n" "${rss[${i}]}"
            #printf "${n}: \e[32m%s\e[m\n" "${rss[${i}]}"
            #printf "${n}: \e[33m%s\e[m\n" "${rss[${i}]}"
            printf "${n}: \e[34m%s\e[m\n" "${rss[${i}]}"
         fi
      done

      echo

      shift

   done   # while

   set +f
   IFS="$OIFS"

   return 0
}


alias breadrss='breadrss | less -r'
breadrss


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


# batch read rss full-screen

# full screen
# cf. http://codesnippets.joyent.com/posts/show/1516

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


# increase font size
# cf. http://codesnippets.joyent.com/posts/show/1516

function ifont() { 

   /usr/bin/open -a Terminal

/usr/bin/osascript <<__END__
    repeat ${1:-1} times
       tell application "System Events" to tell process "Terminal" to keystroke "+" using command down
    end repeat
__END__

   return 0 
}


alias breadrss='fscreen; ifont 10; sleep 3; breadrss | less -r'

[cmd-n]   # new Terminal window
breadrss

Enable & disable the root user account on Mac OS X

to shell osx mac bash user root account disable enable by jvs on Jan 02, 2009

See: Another way to enable and disable root

# enable root user account
/usr/sbin/dsenableroot

# disable root user account
/usr/sbin/dsenableroot -d

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Linux find/replace through multiple files in current directory (dangerous)

javascript email address validation with regular expression

Find directories with trailing spaces

ruby state options array

Post To A Web Page

Empty String

APC helper library

Concatenate two arrays in Bash

Simple command line rss reader using XMLStarlet

Enable & disable the root user account on Mac OS X

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