List process listening on port

.zshrc

# Below content is in .zshrc file normally under ~/.zshrc
# Do NOT replace your entire .zshrc with this content, but rather pick the pieces and APPEND to your existing .zshrc

# DOTNET
alias dri="dotnet restore --interactive"
alias db="dotnet build"

# K8S
# Usage: kx <context>
kx() {
    kubectl config use-context $1
}
alias k=kubectl
[[ $commands[kubectl] ]] && source <(kubectl completion zsh)

# SUBLIME
export EDITOR="/Applications/Sublime\ Text.app/Contents/SharedSupport/bin/subl"

# LAZYGIT
# Usage: lg
lg()
{
    export LAZYGIT_NEW_DIR_FILE=~/.lazygit/newdir

    lazygit "$@"

    if [ -f $LAZYGIT_NEW_DIR_FILE ]; then
            cd "$(cat $LAZYGIT_NEW_DIR_FILE)"
            rm -f $LAZYGIT_NEW_DIR_FILE > /dev/null
    fi
}

# LAZYDOCKER
alias ld=lazydocker

# NETWORKING
# Usage: listening <PORT>
listening() {
    if [ $# -eq 0 ]; then
        lsof -iTCP -sTCP:LISTEN -n -P
    elif [ $# -eq 1 ]; then
        lsof -iTCP -sTCP:LISTEN -n -P | grep -i --color $1
    else
        echo "Usage: listening [pattern]"
    fi
}