valmat’s gists

valmat / GenericMakefile.mk

Created December 14, 2021 07:16 — forked from natanaeljr/GenericMakefile.mk

Simple generic makefile example to start a project quickly. Can: select C or C++ compiler automatically, identify multiple extentions, detect auto-dependencies and compile modified files only, etc. Various modifiable settings.

	PROJECT := $(notdir $(CURDIR))
	EXCECUTABLE = $(BUILDDIR)/$(PROJECT)

	# Directories specification
	SRCDIRS := src
	INCDIRS := include
	BUILDDIR := build

	# @note: to add another source extension, add to herer AND make sure to
	# write the " $(BUILDDIR)/%.o: %.ext " rule for this extention in order to work

valmat / if_constexpr_type.cpp

Created September 15, 2021 18:33

if constexpr to switch type

	// if constexpr to switch type
	//
	template<uint8_t N>
	struct _buf_type
	{
	static_assert(N > 0, "Buffer must be more then 0");
	static_assert(N <= 64, "Maximum buffer size is 64");
	constexpr static auto _i2t()
	{
	if constexpr (N <= 8 ) {return uint8_t(0) ;}

valmat / find_mt.d

Last active August 25, 2022 13:27

Multithreading find and execute

	#!/usr/bin/rdmd --shebang= -I. -w -debug -g

	//
	// multithreading find and execute
	//

	/*
	ldc2 -O3 -dw -release -w -boundscheck=off -fvisibility=hidden -c find_mt.d -of=find_mt.o && \
	ldc2 -O3 -dw -release -w -link-defaultlib-shared=false -L-l:libphobos2-ldc.a -L-l:libdruntime-ldc.a -L-l:libz.a find_mt.o -of=find_mt && \
	strip --strip-all find_mt && \

valmat / get_tz.sh

Created October 2, 2019 11:07

Get all time zones and their offsets in Linux.

	#!/bin/bash

	for tz in $(timedatectl list-timezones \| grep -v 'UTC')
	do
	gmtoff=$(zdump -v "$tz" \| grep 'gmtoff' \| tail -n1 \| grep -oE "[^ ]+$")
	tz_offset="${gmtoff:7}"

	if [[ "${gmtoff:0:7}" == "gmtoff=" ]]; then
	echo "$tz;$tz_offset"
	fi

valmat / proxy.md

Created April 14, 2018 08:34

proxy

Проверено на 5 баксовом тарифе DigitalOcean

Создаём proxy пользователя для аутентификации по паролю:

useradd -d /dev/null teleg
passwd teleg

valmat / double_static_polymorphism.cpp

Created March 27, 2018 19:10

CRTP. Double static polymorphism

	//
	// CRTP. Double static polymorphism
	//
	// g++ -std=c++14 1.cpp && ./a.out

	#include <iostream>
	#include <string>


	using std::cout;

valmat / vlm.utils.destructing.d

Last active June 1, 2020 18:20

variable destructuring; array to variables list; destructuring assign. Traversable, Tuple

	//
	// May destructing variables for itarable types and tuples
	//

	module vlm.utils.destructing;

	import std.range : empty, popFront, front;
	import std.traits : isIterable;
	import std.typecons : Tuple, tuple, isTuple;
	import std.functional : forward;

valmat / private_constructor_eb.cpp

Created February 16, 2018 17:19

Solving prblem with emplace_back and private constructor

	#include <vector>
	#include <iostream>

	class A
	{
	private:
	struct private_key {};
	// private constructor
	A(int a) :
	a(a)

valmat / StringManip.d

Last active February 20, 2018 07:04

variable destructuring; array to variables list; destructuring assign.

	module StringManip;

	import std.range : empty, popFront, front;


	auto destr(Arg0, Args...)(ref Arg0 arg0, ref Args args)
	{
	return DestrInstance!(Arg0, Args.length+1)(arg0, args);
	}

valmat / try-haskell.hs

Created November 14, 2016 17:32

try haskell

	join :: Char -> [String] -> String
	join _ [] = []
	join _ [s] = s
	join gl arr =
	head arr ++ gl : joingl (tail arr)
	where
	joingl = join gl

	putStrLn (join ':' ["str1", "str2", "str3"])

Valeriy Dmitriev valmat