mkdir + cd in a single command

mdkircd.sh

# Place this in your .bash_profile, reload .bash_profile
# Type 'mkdircd [new-directory-name]'
# Rejoice

# Found here: http://linux.101hacks.com/cd-command/mkdir-and-cd-together/#comment-4
# I shortened mine to 'mdcd'

function mkdircd () { mkdir -p "$@" && cd $_; }