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Functional programming with bash experiment.
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#!/bin/bash | |
function stdout { | |
echo -e "\e[32m$@\e[0m"; | |
} | |
function stderr { | |
echo -e "\e[31m$@\e[0m" 1>&2; | |
} | |
function stdlog { | |
echo "$@"; | |
} >> /tmp/foo.log | |
function :pipe { | |
if [ $# -ne 0 ]; then | |
:multi $@; | |
else | |
while read -r; do | |
echo $REPLY; | |
done | |
fi | |
} | |
function :multi { | |
while read -r; do | |
for i in ${@:1}; do | |
$i $REPLY; | |
done | |
done | |
} | |
function :eval { | |
while read -r; do | |
STDIN=$REPLY; | |
eval $1; | |
done | |
} | |
function :color { | |
case "$1" in | |
'red' ) :eval 'echo -e "\e[31m$STDIN\e[0m"';; | |
'green' ) :eval 'echo -e "\e[32m$STDIN\e[0m"';; | |
'yellow' ) :eval 'echo -e "\e[33m$STDIN\e[0m"';; | |
'blue' ) :eval 'echo -e "\e[34m$STDIN\e[0m"';; | |
'purple' ) :eval 'echo -e "\e[35m$STDIN\e[0m"';; | |
'magenta' ) :eval 'echo -e "\e[36m$STDIN\e[0m"';; | |
'grey' ) :eval 'echo -e "\e[37m$STDIN\e[0m"';; | |
* ) :eval 'echo "$STDIN"';; | |
esac | |
} | |
Author
missinglink
commented
Dec 5, 2013
# Redirect stdout
┌─2> stderr 2>
stdin ─┤ ┌─2> stderr
└─1> stdout | stdin ─┤
└─1> stdout
# Redirect stderr to stdout
┌─2> stderr 2>─┐ ┌─2> stderr
stdin ─┤ ├─2>&1 | stdin ─┤
└─1> stdout 1>─┘ └─1> stdout
# Redirect stdout
┌─2> stderr 2>
stdin ─┤ ┌─2> stderr
└─1> stdout | stdin ─┤
└─1> stdout
# Redirect stderr to stdout
┌─2> stderr 2>&1 ─╖
stdin ─┤ ║ ┌─2> stderr
└─1> stdout ──────╨─1> stdout | stdin ─┤
└─1> stdout
what have you done
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