If you should happen to find yourself needing some binary numbers, this is a quickie way of doing it. If you need more digits, just add more "{0..1}" sequences for each digit you need. You can assign them to an array, too, and access them by their decimal equivalent for a quickie binary to decimal conversion (for larger values it's probably better to use another method). Note: this works in bash, ksh and zsh. For zsh, though, you'll need to issue a setopt KSH_ARRAYS to make the array zero-based.
binary=({0..1}{0..1}{0..1}{0..1})
echo ${binary[9]}
Show Sample Output
I've corrected the function. My octal conversion formula was completely wrong. Thanks to pgas at http://mywiki.wooledge.org/BashFAQ/071 for setting me straight. The new function is from pgas and is very fast. Show Sample Output
Convert some decimal numbers to binary numbers. You could also build a general base-converter:
function convBase { echo "ibase=$1; obase=$2; $3" | bc; }
then you could write
function decToBun { convBase 10 2 $1; }
Show Sample Output
https://stackoverflow.com/questions/10768160/ip-address-converter Show Sample Output
Doesn't fail for percent sign now.
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