zsh: possible new feature: remove invalid aliases

.zshrc

@@ -49,7 +49,9 @@
 {
    ## Short hand programs (ex: sc = shellcheck) >>>
    # use nvim rather than vim if the command exists
-   [ -x "$(command -v nvim)" ] && alias vim='nvim' vimdiff='nvim -d'
+   alias \
+      vim='nvim' \
+      vimdiff='nvim -d'
 
    alias \
       vv="$EDITOR" \
@@ -60,8 +62,8 @@
    alias :q='exit' \
          q='exit' \
 
-   alias vim=nvim
    alias sc=shellcheck
+
    # rmdir is long
    alias \
       rmd='rmdir' \
@@ -164,6 +166,22 @@
    # <<<
    # optionally source an external alias file
    [ -f "${XDG_CONFIG_HOME:-$HOME/.config}/shell/aliasrc" ] && source "${XDG_CONFIG_HOME:-$HOME/.config}/shell/aliasrc"
+
+   # # TODO: remove all aliases that refrence programs which do not exist >>>
+   # validate_alias() {
+   #    # check if the alias points to an alias
+   #    if alias "$(alias lsd | grep -Po "(?<=').*(?=')")"; then
+   #       :
+   #    else
+   #       # see if the thing the alias points to is an executable
+   #       test -x "$(command -V "$1" | grep -Po "(?<=$1 is )/.*$")"
+   #    fi
+   # }
+   # for ALIAS in $(alias | cut -d = -f 1);do
+   #    validate_alias "$ALIAS" &&
+   #       unalias "$ALIAS" &&
+   #       echo "alias $ALIAS was removed"
+   # done # <<<
 }
 # <<<
 ### Functions >>>
@@ -179,7 +197,7 @@
       fi
    }
 
-   # cd file: cd to the containing dir of a file, given part of its name
+   # cd file: cd to the containing dir of a file or folder, given part of its name
    # can take an `fd` command
    # requires that `fzy` is installed
    cdf() {
@@ -275,6 +293,22 @@
       echo "$FILEPATH" | grep -o 'site.*' | sed 's+^site+https://blakenorth.net+g'
    }
 
+   # Opens a subshell in each of the directories below the one you're in, so
+   # you can execute commands in them
+   # If I use this enough, I may make something that can do more
+   # Ideas for what it could do in the future:
+   # - somehow record typed commands so they can be automatically repeated
+   #     - maybe get the length of the histfile before and after, executing the
+   #     last X number of commands
+   # - Maybe just add an argument that takes a command and executes it in all dirs
+   # (although that wouldn't be as good as recording actions bc it's easy to do
+   # that by just writing a for loop)
+   foreachdir() {
+      for DIR in *; do
+         (cd "$DIR" && zsh)
+      done
+   }
+
    # for sending error messages from functions and whatnot
    error() {
       ERROR_CODE="$?"