corarona

math.randomseed(os.time())
minetest.register_chatcommand("mobtest",{
	description="Spawns all available mobs",
	privs={server=true},
	func=function(n,param)
	local p=minetest.get_player_by_name(n)
	local pos=p:get_pos()
	for k,v in pairs(minetest.registered_entities) do
		if v.horny ~= nil then
			local spos=vector.add(pos,vector.new(math.random(100)+10,0,math.random(100)+10))

Kestrer

How to Write Hygienic Rust Macros

Macro hygiene is the concept of macros that work in all contexts; they don't affect and aren't affected by anything around them. Ideally all macros would be fully hygienic, but there are lots of pitfalls and traps that make it all too easy to accidentally write unhygienic macros. This guide attempts to provide a comprehensive resource for writing the most hygienic macros.

Understanding the Module System

First, a little aside on the details of Rust's module system, and specifically paths; it is

guyzmo

    wl(){
      local ssid
      local conn

      nmcli device wifi rescan > /dev/null
      ssid=$(nmcli device wifi list | tail -n +2 | grep -v '^  *\B--\B' | fzf -m | sed 's/^ *\*//' | awk '{print $1}')

      if [ "x$ssid" != "x" ]; then
        # check if the SSID has already a connection setup
        conn=$(nmcli con | grep "$ssid" | awk '{print $1}' | uniq)

KodrAus

Profiling performance

Using perf:

$ perf record -g binary
$ perf script | stackcollapse-perf.pl | rust-unmangle | flamegraph.pl > flame.svg

NOTE: See @GabrielMajeri's comments below about the -g option.