hyone’s gists

hyone / Cargo.toml

Created July 2, 2017 11:11

Rust で並列HTTP Request (非同期IO版) ref: http://qiita.com/hyone/items/7f448c46611d9b19e643

hyone / Cargo.toml

Last active July 11, 2017 01:07

Rust で並列HTTP Request ref: http://qiita.com/hyone/items/32698ae6e3de641a0fa1

hyone / gitfile1.rs

Last active October 15, 2016 07:18

open file with std::error::Error

	use std::error::Error as StdError;
	use std::env;
	use std::fmt;
	use std::fs::File;
	use std::io::Error as ioError;
	use std::io::prelude::*;
	use std::path::Path;


	macro_rules! eprintln {

hyone / gist:02b81a2a176ca0ada59a3343b6787b79

Last active October 9, 2016 07:53

Practice: lifetime qualifier added version of sample code at http://rustbyexample.com/trait.html

	struct Sheep<'a> { naked: bool, name: &'a str }

	trait Animal<'a> {
	fn new(name: &'a str) -> Self;

	fn name(&self) -> &str;
	fn noise(&self) -> &str;

	fn talk(&self) {
	println!("{} says {}", self.name(), self.noise());

hyone / gist:d6018ee1ac8f9496fed839f481eb59d6

Last active April 2, 2022 08:15

Practice: implement `Display` trait for `slice` wrapper

	use std::fmt::{ Debug, Display, Formatter, Result };
	use std::string::ToString;

	#[derive(Debug)]
	struct Slice<'a, T: 'a> {
	data: &'a [T]
	}

	impl <'a, T: ToString> Display for Slice<'a, T> {
	fn fmt(&self, f: &mut Formatter) -> Result {

hyone / file0.txt

Created April 7, 2016 10:46

Ecto.Query を SQL に変換する ref: http://qiita.com/hyone/items/06fd744c54d701617a7d

	# iex -S mix
	iex(1)> import Ecto.Query
	nil
	iex(2)> import Ecto.Adapters.SQL
	nil

	iex(3)> user_id = 2
	2

	iex(4)> q = from u in SampleApp.User, join: fu in assoc(u, :relationships), where: u.id == ^user_id, select: fu.id

hyone / gist:8205717

Created January 1, 2014 06:46

ruby koans: about_scoring_project.rb

	# Greed is a dice game where you roll up to five dice to accumulate
	# points. The following "score" function will be used to calculate the
	# score of a single roll of the dice.
	#
	# A greed roll is scored as follows:
	#
	# * A set of three ones is 1000 points
	#
	# * A set of three numbers (other than ones) is worth 100 times the
	# number. (e.g. three fives is 500 points).

hyone / gist:6128565

Last active December 20, 2015 12:09

Number of binary trees have N leaves with logging by Writer Monad #2 ( see: http://hyone.hatenablog.com/entry/20120803/1343996582 )

	{-# LANGUAGE FlexibleContexts #-}

	import Control.Monad.List
	import Control.Monad.Trans (lift)
	import Control.Monad.Writer

	splites :: Int -> [(Int, Int)]
	splites n = [ (x, n - x) \| x <- [1..n-1] ]

	liftList :: Monad m => [a] -> ListT m a

hyone / HList.hs

Last active December 10, 2015 04:08

Typed Heterogeneous Lists with DataKinds language extension

	{-# LANGUAGE ConstraintKinds #-}
	{-# LANGUAGE DataKinds #-}
	{-# LANGUAGE GADTs #-}
	{-# LANGUAGE ScopedTypeVariables #-}
	{-# LANGUAGE TypeFamilies #-}
	{-# LANGUAGE TypeOperators #-}
	{-# LANGUAGE UndecidableInstances #-}

	module HList where

hyone / gist:3994646

Created November 1, 2012 16:10

Example code to implement instances for Singlton types

	{-# LANGUAGE DataKinds #-}
	{-# LANGUAGE TypeFamilies #-}
	{-# LANGUAGE TypeOperators #-}
	{-# LANGUAGE UndecidableInstances #-}
	{-# LANGUAGE FlexibleInstances #-}
	{-# LANGUAGE MultiParamTypeClasses #-}
	{-# LANGUAGE ScopedTypeVariables #-}


	-- \| Example code to implement instances for Singlton types introduced GHC 7.6.1