MeyCry’s gists

MeyCry / do-sha-hashing.ts

Created June 6, 2024 12:40

Sha hashing in browser

	export async function doShaHashing(message: string, algorithm: 'SHA-256' \| 'SHA-384' \| 'SHA-512') {
	// Check if the specified algorithm is supported
	const supportedAlgorithms = ['SHA-1', 'SHA-256', 'SHA-384', 'SHA-512'];
	if (!supportedAlgorithms.includes(algorithm.toLowerCase())) {
	throw new Error(`Unsupported algorithm: ${algorithm}`);
	}

	// Encode the message as a Uint8Array
	const encoder = new TextEncoder();
	const data = encoder.encode(message);

MeyCry / indexeddb-helper.ts

Last active May 18, 2023 13:31

indexeddb-helper.ts

	// indexeddb-helper.ts
	class IndexedDBHelper {
	private readonly dbName: string;
	private readonly storeName: string;

	constructor(dbName: string, storeName: string) {
	this.dbName = dbName;
	this.storeName = storeName;
	}

MeyCry / index.js

Created May 30, 2020 19:05

Get from event submit name of input as key and value of input as value of object.

	const data = new FormData(ev.target);
	const dataObj = Object.fromEntries(data.entries());

MeyCry / index.tsx

Created May 6, 2020 18:54

reject react router v5 navigate

	import { Location } from "history";
	import React, { useEffect, useState } from "react";
	import { Prompt } from "react-router-dom";
	import { SubmitDialogComponent } from "./Modal";

	interface Props {
	when?: boolean \| undefined; // just use true
	navigate: (path: string) => void; // (path) => history.push(path)
	shouldBlockNavigation: (location: Location) => boolean;
	}

MeyCry / index.ts

Created May 1, 2020 17:56

throttle function

	/**
	* Call fn not more often but and not less then ms
	* @param {function} fn - function what need to call not often but and not less then ms
	* @param {number} ms - time in milliseconds
	* @return (any[]) => void
	*/
	export const throttle = (fn: (...args: any[]) => void, ms: number = 0) => {
	let timeoutId = null;
	let lastCall = 0;

MeyCry / index.js

Created April 15, 2020 21:27

validate brackets and merge sorted arrays.

	(function() {
	// 1

	function smartJoin(arrA, arrB) {
	let aIndex = 0;
	let bIndex = 0;
	const result = [];

	while (aIndex < arrA.length \|\| bIndex < arrB.length) {
	const itemA = arrA[aIndex];

MeyCry / ReturnedValueFromObjectMethodByKey.ts

Last active March 31, 2020 14:11

TypeScript Returned Value From Object Method By Key

	/**
	* example:
	* const aObj = {
	* b: () => 42,
	* c: () => "hello"
	* }
	* type ObjExample = ReturnedValueFromObjectMethodByKey<typeof aObj>;
	* ObjExample type will be: {b: number; c: string}
	*/

MeyCry / flatter.js

Last active January 20, 2020 22:53

flatter for array

MeyCry / str-finder.js

Last active December 12, 2019 18:03

find longest substring in string

	function find2(str) {
	let _helper = [];
	return str
	.split('')
	.reduce((acum, item, i, originalArr) => {
	if (_helper.some(char => char === item)) {
	acum.push(_helper);
	_helper = [];
	}
	_helper.push(item);

MeyCry / getBoundingClientRect

Last active July 22, 2019 12:38

	function getBoundingClientRect(el) {
	return new Promise((res, rej) => {
	requestAnimationFrame(() => {
	res(el.getBoundingClientRect());
	});
	});
	}

Vadim MeyCry