Is there a way to test whether a shell function exists that will work both for bash and zsh?
Test for function's existence that can work on both bash and zsh?
bash;shell script;zsh;function
If you want to check that there's a currently defined (or at least potentially marked for autoloading) function by the name foo regardless of whether a builtin/executable/keyword/alias may also be available by that name, you could do:if typeset -f foo > /dev/null; then  echo there is a foo functionfiThough note that if there's a keyword or alias called foo as well, it would take precedence over the function (when not quoted).The above should work in ksh (where it comes from), zsh and bash.