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this thread is the most useless thread. ?

if you have Ruby

# ruby -F"\s+" -ane '$F[3..-1].each{|x| puts $F[0..2].join(" ") + " " + x }' file
LG1 R500 A-170 F1:81
LG1 R500 A-170 F1:22
LG1 R500 A-170 F2:32
LG1 R500 A-170 F1:71
LG1 R700...

# echo "abcd fkaj&dsdsd" | ruby -e 's=gets; puts s.gsub(/([& ;])\1*/,"\\\\\\1")'
abcd\ fkaj\&dsdsd

bring your password outside the script. Usually the way to do this is via a database that provide login mechanisms + encryption. If not, you can set up an encrypted file that stores the password. See...

$ ruby -ne 'puts $_.gsub(/\s+/,"/")' file
$ ruby -ane 'puts $F.join("/")' file


---------- Post updated at 07:28 AM ---------- Previous update was at 07:27 AM ----------



that don't change...

$ ruby -ne 'print $_.gsub(/.*file:\/\/\/|\(score|,\s+docid.*$/,"") if /^\d+\./' file
path1/path2/path3/path4/251192.dat 3.849384
path1/path2/path3/path4/173859.dat 3.831033...

ruby -ne 'print if /^[DH]/' file

Ruby(1.9.1+)

f=open("file")
numcols=f.readline.split.size
cols=(1..numcols).to_a.sample(4)
while not f.eof?
line=f.gets.split
cols.each{|x| printf "%s " , line[x-1]}
puts
end...

$ echo "/home/one/two/three/" | ruby -e 'puts gets.gsub(/\/$/,"").split("/")[-1]'
three

$ echo "/home/one/two/three/" | ruby -e 'puts gets.split("/")[-2]'
three

$ ruby -ne 'puts $_.scan(/[\(\047](.*?)[\)\047]/).flatten.join("\s")' file
130 ESN:27723211621B01DJ68AG AVAILABLE
130 ESN:27723211634ATADJ68AK AVAILABLE

Ruby(1.9+)

$ ruby -i -pne '$_="c\n" if $.==2; ARGF.close if ARGF.eof' 3 4

the variable $. will not reset to 1 once the next file starts. It will continue counting.

$ tac file | grep -m1 string

go through the columns, check for "etime", if found, print column 1 and the etime colum. NF means number of fields

$ echo 0000000011179E0A | ruby -e 'print gets.sub(/^0*/,"")'
11179E0A

Just

for f in *$OLD_EXT; do
....
echo "Old File: " $f
echo "New File: " $NEW_FILE
.....
done

1) start with dash

/^-/


2) starts with 1 character then either a "-" or "+" and then up to 3 characters such as "a+rx"


/^.[-+].{1,3}/


---------- Post updated at 11:31 PM ----------...

Ruby(1.9+)

$ ruby -0777 -ne 's=$_.split("\n"); puts (s.size%2==0)? s[(s.size/2)-1]:s[s.size/2] ' file

well i missed that out didn't i ? :)

to generate base64,


require 'base64'

# xml template
xml=<<EOF
<file>
<text>%s</text>
<pdfcontent>%s</pdfcontent>
</file>
EOF
...

why not use -c option?

@cgkmal, there are more information from coreutils info.

info coreutils 'ls invocation'

$ ruby -ne 'BEGIN{srand};puts $_.split.shuffle.join(" ")' file
for test is shuffle a random this
$ ruby -ne 'BEGIN{srand};puts $_.split.shuffle.join(" ")' file
for random is shuffle a this test...

$ ruby -pne '$_.gsub!(/\d+px/,"40px") if /^\s+height/ && !$_["-"]' file
height: 40px;
line-height: 1.5em;
height: 40px;
height: 40px;
height: 40px;
line-height: 17px;

$ ruby -0777 -ne 'puts $_.gsub(/\/\*.[^\\][^\*]*\*\//m,"")' file

Some text
Text1
Text2
Some text
Note this text
Note here again

$ ruby -F"\|" -ane 'puts $F.select{|x|!x[/^lobfile/]}.join("|")' file
1200|name1|abcd
1201|name2|abcd