Add Emacs-like delete-horizontal-space and just-one-space key binds

.zshrc

@@ -62,6 +62,23 @@ zstyle ':completion:*' matcher-list 'm:{[:lower:]-}={[:upper:]_} r:|[.]=**' '+l:
 bindkey '^[[5~' history-substring-search-up
 bindkey '^[[6~' history-substring-search-down
 
+# equivalents of eponymous Emacs functions
+# from https://unix.stackexchange.com/a/595157
+delete-horizontal-space() {
+  emulate -L zsh
+  set -o extendedglob
+  LBUFFER=${LBUFFER%%[[:blank:]]##}
+  RBUFFER=${RBUFFER##[[:blank:]]##}
+}
+zle -N delete-horizontal-space
+bindkey '\e\\' delete-horizontal-space
+just-one-space() {
+  delete-horizontal-space
+  LBUFFER="$LBUFFER "
+}
+zle -N just-one-space
+bindkey '\e ' just-one-space
+
 # Inserts 'sudo ' at the beginning of the line.
 function prepend-sudo() {
   if [[ "$BUFFER" != su(do|)\ * ]]; then