Akira TANAKA akirattii

A web tool craftman.

akirattii / background.js

Created December 2, 2016 03:45

Message passing of Chrome Extension example

	/*****************************************************************
	* onMessage from the extension or tab (a content script)
	*****************************************************************/
	chrome.runtime.onMessage.addListener(
	function(request, sender, sendResponse) {
	if (request.cmd == "any command") {
	sendResponse({ result: "any response from background" });
	} else {
	sendResponse({ result: "error", message: `Invalid 'cmd'` });
	}

akirattii / how-long-your-mining-block-found.js

Created December 4, 2016 11:57

How to know how long your mining block will be found on Ethereum.

	// How long it will take for finding your mining block
	// will be known from your 'hashrate' and the latest block's 'difficulty':
	etm = eth.getBlock("latest").difficulty / miner.hashrate; // estimated time in seconds
	Math.floor(etm / 3600.) + "h " + Math.floor((etm % 3600) / 60) + "m " + Math.floor(etm % 60) + "s";
	// 1h 3m 30s

	// ref. https://ethereum.gitbooks.io/frontier-guide/content/mining_with_geth.html

akirattii / Crowdsale.sol

Last active December 22, 2016 10:29

Ethereum クラウドセール・コントラクト(β)

akirattii / ImperialDiet.sol

Last active December 23, 2016 23:14

Ethereum帝国議会コントラクトβ

	pragma solidity ^0.4.7;

	// # テスト用パラメータ
	//
	// ## テスト・シチュエーション
	// - 受益者(臣民4)に利益供与(コインを送金)するかどうかを議会で決めます
	//
	// ## 登場人物のアドレス
	// - 初代皇帝(emperor): accounts[0] 0x4a1c11eaec40197beb6e8607ee61953e7d6d8731
	// - 臣民1(subject1): accounts[1] 0x5855a19b64e1068a1edc39bb817647e16a1c57e7

akirattii / ZaifAPI-WebSocketClient-Example.html

Last active January 10, 2017 02:43

Example of Zaif WebSocket Stream API

	<!DOCTYPE html>
	<html>

	<head>
	<meta charset="utf-8">
	<title>Zaif WebSocket Stream API Example</title>
	</head>

	<body>
	<button id="btn-start">start</button>

akirattii / step-with-parallel-example.js

Last active January 19, 2017 09:38

node step module example using `parallel()`

	var Step = require("step");

	function asyncFn(str, cb) {
	setTimeout(function() {
	let err = null;
	let result = " Hello " + str;
	return cb(err, result); // error-first style callback
	}, 1000);
	}

akirattii / step-without-error-thrown.js

Created January 19, 2017 09:55

node step module example without error throwing to avoid any troubles related to it

akirattii / sse-serverside-example.js

Last active April 26, 2024 11:15

Server-Sent Events nodejs example. This shows how to detect the client disconnection.

	var express = require('express');
	var app = express();

	// response header for sever-sent events
	const SSE_RESPONSE_HEADER = {
	'Connection': 'keep-alive',
	'Content-Type': 'text/event-stream',
	'Cache-Control': 'no-cache',
	'X-Accel-Buffering': 'no'
	};

akirattii / .tern-project

Last active June 27, 2017 22:24

ternjs project file for sublime text3 which gives availability of auto completion corresponding to export module pattern.

akirattii / step-with-generator.js

Created January 30, 2017 04:11

Synchronous iteration for milding cpu overload using node-step with generator