ARCHIVE OF ZSH TRICKS AND SHORTCUTS

Replicates key digit times.
Alt-<digit>-<key>

Send to both stdout and a file.
prog > /dev/stdout > output_file

Expand to last arg of command n times ago.
!-n$

Expands to the dth argument in last command.
!:d

Background a remote job even after logout.
nohup prog &> /dev/null < /dev/null &!

Execute code when a script finishes.
my-exit-fn() {
  # stuff
}
trap my-exit-fn EXIT

Insert text before every array element.
files=(*.ext)
mutt {-a,$^files}

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

BINDINGS
Esc-h  run man page for command
Esc-x  execute named widget

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

Use zmv to move files according to a pattern.
autoload zmv

Rename files by transposing the text on either side of the underscore.
zmv -n '(*)_(*).doc' '$2_$1.doc'

Rename files by inserting a leading 0.
zmv 'page([0-9][0-9][0-9][0-9]).txt' 'page0$1.txt'

Lowercase file names.
zmv '(*).f5' '${(L)1}.f5'

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

Make all files below dir entirely readable and all directories readable and
executable.
chmod a+r dir/**/*(.)
chmod a+rx dir/**/*(/)

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

Replace spaces in filenames with underscores.
for i in *\ *; do mv "$i" ${i:gs/ /_/}; done

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

ID=CS594S02; \
   pavuk -mode sync -dont_leave_dir \
   -dont_leave_site_enter_dir -user_condition \
   =(chmod u+x /dev/fd/1; \
     echo '#!/bin/sh'; \
     echo 'echo $2 | \
       awk "{if (match($0, ''"'$ID'"'')){exit 1;} else {exit 0;} }"') \
   http://www.cs.utk.edu/~huangj/CS594S02/Schedule.html

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

To grab files not matching a pattern, use the caret before the pattern:
   ls ^*.o

To show only non-source files, try:
   ls *~*.cpp~*.h
   ls ^(*.cpp|*.h)

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

Glob Qualifers - following a glob pattern with qualifiers enclosed in
parentheses to limit the returned filenames.  For example:

   ls *(/) - view directories

Here's a list of some useful qualifiers:
   /   Match directories
   .   Match plain files
   @   Match symlinks
   *   Match executable plain files
   ^   Negate following qualifiers
   on  sort by name (for ls, try ls -U so that ls doesn't resort)
   On    in reverse

   u[username]

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

To erase a file, run:

: > file

The colon tells the shell to ignore the result.  The rest of the command is 
just a redirection which erases the contents of file.

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

To redirect both stderr and stdout, use &>:

   ls &>/dev/null

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

This little shell script replaces all symbolic links which point to
files with hardlinks.

for i in *(@); do \
   fullpath=$(perl -e 'use Cwd realpath; print realpath($ARGV[0]);' $i); \
   if [[ ! -d $fullpath ]]; then \
      echo ln -f $fullpath $i \
   fi \
done

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

myprog | tee file.txt
   is equivalent to
myprog >file.txt >/dev/fd/0