Oleksandr Kovpashko okovpashko

okovpashko / index.js

Last active May 26, 2022 13:09

Detect UTF-8 BOM symbol with Node.js

	const {open, read} = require('fs/promises');
	const {resolve} = require('path');

	async function main([filePath]) {
	const resolvedPath = resolve(filePath);
	let file;

	try {
	file = await open(resolvedPath);
	} catch(e) {

okovpashko / flow-object-values-by-union-key.js

Created August 30, 2020 16:58

	// @flow

	type Key = 'foo' \| 'bar';

	/**
	* We must define an object type with an indexer that uses the same union type.
	* Otherwise Flow will throw an error when we try accessing the value by a key
	*/
	const titles: {[Key]: string} = {
	foo: 'This is a foo',

okovpashko / flow-generics-with-react-components.js

Last active August 21, 2020 13:29

	// @flow

	import React, {type ComponentType, type AbstractComponent} from 'react';

	////////////////////////////
	// A generic list component
	////////////////////////////

	type ListProps<P> = {\|
	component: ComponentType<P>,

okovpashko / test.js

Created September 8, 2015 21:22

Fill all text nodes on page with long text

	var a,
	w=document.createTreeWalker(document,NodeFilter.SHOW_TEXT);
	while(a=w.nextNode()){
	if(a.textContent.trim().length) {
	a.textContent='Одиннадцатиклассница пошла посмотреть на достопримечательность, она шла долго, несколько строчек, пока не пришла';
	}
	}

okovpashko / gist:6b12f7c0fefdf92dfd25

Created July 27, 2015 13:03

Convert utf8 DB with latin1 data to utf8

	mysqldump --user=username --password=password --default-character-set=latin1 --skip-set-charset dbname > dump.sql
	sed -i -E 's/latin1/utf8/g' dump.sql
	mysql --user=username --password=password --execute="DROP DATABASE dbname; CREATE DATABASE dbname CHARACTER SET utf8 COLLATE utf8_general_ci;"
	mysql --user=username --password=password --default-character-set=utf8 dbname < dump.sql

okovpashko / gist:db28f3eb7de713f399eb

Created April 21, 2015 19:31

Common screen widths for @media breakpoints

okovpashko / gist:5295e3a339d28de9a515

Last active August 29, 2015 14:14

Gaussian distribution

	// Taken from here: http://habrahabr.ru/post/208684/

	function Gauss() {
	var ready = false;
	var second = 0.0;

	this.next = function(mean, dev) {
	mean = mean == undefined ? 0.0 : mean; // математичне очікування
	dev = dev == undefined ? 1.0 : dev; // середньоквадратичне відхилення