Cool shell functions

weather.sh

# WEATHER INFO ------------------------------------------------------------
# Usage:
# $ weather [CITY_NAME]
# Examples:
# $ weather                 #returns current local weather
# $ weather "Porto Alegre"  #returns Porto Alegre weather

function weather {
	if [ -z "$1" ]; then
	  curl http://wttr.in/;
	else
	  city=$( printf "%s\n" "$1" | sed 's/ /%20/g' );
	  curl http://wttr.in/$city;
	fi
};