Skip to content

Instantly share code, notes, and snippets.

Akira TANAKA akirattii

Block or report user

Report or block akirattii

Hide content and notifications from this user.

Learn more about blocking users

Contact Support about this user’s behavior.

Learn more about reporting abuse

Report abuse
View GitHub Profile
akirattii / get-absolute-path-example.js
Created Apr 9, 2019
NodeJS: Get an absolute path from any path.
View get-absolute-path-example.js
const path = require("path");
const os = require("os");
console.log("/foo/bar/file.txt", "=>", getAbsolutePath("/foo/bar/file.txt"));
console.log("foo/bar/file.txt", "=>", getAbsolutePath("foo/bar/file.txt"));
console.log("../../foo/bar/file.txt", "=>", getAbsolutePath("../../foo/bar/file.txt"));
console.log("~/file.txt", "=>", getAbsolutePath("~/file.txt"));
console.log("/~/file.txt", "=>", getAbsolutePath("/~/file.txt"));
console.log("/../../file.txt", "=>", getAbsolutePath("/../../file.txt"));
akirattii / simple-basic-type-validation-funcs.js
Created Mar 7, 2019
MEMO: Pure JS super simple basic type validation functions.
View simple-basic-type-validation-funcs.js
function isNumeric(s) {
return !isNaN(parseFloat(n)) && isFinite(n);
function isURL(s) {
return (/^https?\:\/\/(.+)/.test(s));
function isJSON(s) {
let o;
akirattii / example.js
Created Feb 26, 2019
NodeJS: How to run a process (also a shell script etc) on background separated with the parent node process.
View example.js
const spawn = require('child_process').spawn;
// a command you want to execute.
const command = "node cli/hoge.js --aaa --bbb=123";
const parts = cmd.split(" ");
const cmd = parts[0];
const args = parts.splice(1);
// a background process is running!
akirattii / Logger.js
Last active Feb 13, 2019
NodeJS: A simple winston logger wrapper, which is the daily logging rotation (even hourly, minutely and secondly rotation) available.
View Logger.js
* A logger module, which is a simple `winston`(v3) wrapper.
* @version 1.0.1
* lastUpdated: 2019-02-13
* # Usage:
* ```js
* const logCfg = {
* // Label name. It's up to you:
* "label": "server",
akirattii / BarcodeScanner.js
Created Jan 31, 2019
HTML: Barcode Scanner on modern browser
View BarcodeScanner.js
Barcode Scanner library
@author: Akira TANAKA <> (
+ jquery
+ quagga (
## Usage example:
akirattii / ValidatorBase.js
Last active Jan 19, 2019
NodeJS: A validator base class to create your own validator to validate posted data from browser.
View ValidatorBase.js
const Big = require("big.js");
* Validator base class.
* Create your validator subclass derived from this class.
* Assuming that it's used to validate a browser's posting data on server-side.
* ## NOTE: `check*()` methods:
* If validation failed in a checking method named `check*()`,
* some errors are set to `errors` which is passed as a parameter, and also returned as a method's result.
akirattii / how-to-re-idex-auto-increment-id.sql
Last active Jan 16, 2019
[MySQL] How to re-index auto_increment id of a table to make use of resting sequence ids when it reached its max limit.
View how-to-re-idex-auto-increment-id.sql
-- How to re-index the auto_increment id.
-- 0) Create an original table:
`name` VARCHAR(255) NOT NULL,
akirattii / csv-transform-example.js
Last active Jan 6, 2019
[NodeJS] CSV data transform example using stream
View csv-transform-example.js
// Define the transform rule
const transformRules = [
upperCase, // col idx 0: To uppercase. ``upperCase` is function.
{ "1":"1st", "2":"2nd", "3":"3rd" }, // col idx 1: 1=>"1st", 2=>"2nd", ...
{ "A":"PlanA", "B":"PlanB", "C":"PlanC" },// col idx 2: "A"=>"PlanA", ...
const fs = require("fs");
const readStream = fs.createReadStream(__dirname + "/input.csv" );
const writeStream = fs.createWriteStream(__dirname + "/output.csv", { encoding: "utf8" } );
akirattii /
Created Dec 5, 2018
Sublime Text 3: Ignores some "goto definition" candidates by file/folder patterns filter

Sublime Text 3: Ignores some "goto definition" candidates by file/folder patterns filter

Open Project -> Edit Project

  "folders": [
      "path": "hoge-project",
      "follow_symlinks": true,
akirattii / async-iterator-example.js
Created Nov 13, 2018
NodeJS v10: An example of Async-Iterator with Stream API
View async-iterator-example.js
const fs = require("fs");
const inputFilePath = process.argv[2];
console.log("file:", inputFilePath);
async function main(inputFilePath) {
const readStream = fs.createReadStream(inputFilePath, { encoding: 'utf8', highWaterMark: 1024 });
// NOTE: Async-Iterator starts with NodeJS v10, but it's experimental yet. (Current latest LTS version: v10.13.0)
for await (const chunk of readStream) {
You can’t perform that action at this time.