sorting lines with vim

For e.g.

test.txt : 

z

y

x

w

v

u

If I say ->

:1,4 sort

test.txt will become

w

x

y

z

u

v

:.,+3 sort

will sort from current line to current line + 3.

:1,$ sort u

will sort and remove duplicates

To sort in reverse,
sort!

PS: This functionality doesn't work with IntelliJ Idea's vim plugin

Shell sample commands

Need to create a list of all the unique package names explicitly imported

by your Java code? The following stores it in a file called "list."

grep ' ^import ' *. j ava |

sed -e' s/. *import *//' -e's/; . *$//' |

sort -u >list

Source

(sed -e is used for giving multiple commands to sed)

Shell sample commands

Which Java files have not been modified in the last week?

find . -name ' *. java' -mtime +7 -print

Which Java files have been modified in the last week?

find . -name ' *. java' -mtime -7 -print

Finding all files newer than a given file

find all c files newer than the Makefile : 

find . -name ' *. c' -newer Makefile -print

source

Problems in running shell scripts on cygwin

I copied pasted this code : 

#!/usr/bin/sh

N=1

while test "$N" -le "10"

do

echo "Number $N"

  N=$[N+1]

done

in test.sh.

Then ran it like : 

./test.sh

To get : 

./test.sh: line 7: syntax error: unexpected end of file

Issue was that Windows/Dos files don't work well

as shell scripts, due to difference in new line formatting.

So, the solution is , dos2Unix convert command : 

d2u test.sh

And, that's all.

Run happily ever after.

extracting social security number from an xml file using grep and cut

file.txt

<field10>123-45-6789</field10>

<field10>123-45-6789</field10>

<field10>123-4-6789-</field10>

here is the regexp

([0-9]+-)+[0-9]+<

and the command is 

grep -o '\([0-9]\+-\)\+[0-9]\+<' file.txt | cut -d "<" -f 1

Linting php files from command line in Cygwin

$ ls -1 *.php | xargs -n1 ./php.exe -l | grep -i "errors parsing"