#! /bin/zsh
#
# this file:
#   https://dataswamp.org/~incal/conf/.zsh/files-rename

enum-names () {
    local fs=($@)

    local num=0
    local name
    local ext
    for f in $fs; do
        ext=${f:e:l}
        num=$(( $num + 1 ))
        name=${(l:2::0:)num}.${ext}
        mv $f $name
    done
}

change-ext () {
    local ext=$1
    shift

    local fs=($@)

    for f in $fs; do
        if [[ -f $f ]]; then
            mv $f ${f:r}.${ext}
        else
            no-file-msg $f
        fi
    done
}