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golf-shell's Introduction

Golf-Shell

Sample Programs

Hello World

E'Hello World!

Count Files

LlWl

Bash Equivalent:

ls -l | wc -l

Reverse String

Takes an argument and prints it out in reverse order

E"$0"Go'.'BrTd'\n

Bash Equivalent:

echo "$0" | grep -o '.' | tail -r | tr -d '\n'

Divisibility

Prints all numbers less than 1000 that are divisible by 5 and/or 7

R'1000'FG' [57] 'Cd':'f1

Bash Equivalent:

seq 1000 | factor | grep ' [57] ' | cut -d":" -f1

BC Math

Takes an argument, n, and adds the first n numbers

R'$0'T'\n'':'Se's/:/+/g'e's/+/\n/$0'M

Bash Equivalent:

seq "$0" | tr '\n' ':' | sed -e 's/:/+/g' -e "s/+/\n/$0" | bc -l

2 + 2 = 5

Takes a mathmatical expression and if it is 2+2 outputs 5; otherwise outputs the correct answer

?[$0==2+2];E'5':E"$1"M;

Bash:

if [[ "$0" == "2+2" ]] ; then echo '2'; else echo "2+2" | bc -l; fi

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