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Martin Eneqvist marlun78

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@marlun78
marlun78 / mround.ts
Last active March 23, 2023 17:05
A TypeScript implementation of the `mround` function from Google Sheets, Microsoft Excel etc.
View mround.ts
/**
* Rounds one number to the nearest integer multiple of another.
* @param value The number to round to the nearest integer multiple of another.
* @param factor The number to whose multiples value will be rounded.
* @example
* mround(10, 3); // 9
* mround(-10, -3); // -9
* mround(5, -2); // Error: Parameters of mround must have same signs (both positive or both negative)
*/
export function mround(value: number, factor: number): number {
@marlun78
marlun78 / react-lazy-component.html
Last active November 29, 2022 22:00
React Lazy Component Demo
View react-lazy-component.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>React Lazy Component Demo</title>
</head>
<body>
<div id="root">This is the React root</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/18.2.0/umd/react.development.js" integrity="sha512-m7nhpWHotpucPI37I4lPovL28Bm2BhAMV8poF3F8Z9oOEZ3jlxGzkgvG0EMt1mVL1xydr1erlBbmN90js/ssUw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
@marlun78
marlun78 / flat-map.ts
Last active October 21, 2020 08:11
TypeScript flatMap
View flat-map.ts
export const flatMap = <T, U>(
array: T[],
callback: (value: T, index: number, array: T[]) => U
): U[] => {
return Array.prototype.concat(...array.map(callback));
};
@marlun78
marlun78 / react-switch-component.js
Last active November 7, 2018 08:27
Idea for a React <Switch> component
View react-switch-component.js
/**
* react-switch-component.js
* Copyright (c) 2018 marlun78
* MIT License, https://gist.github.com/marlun78/bd0800cf5e8053ba9f83
*/
import { Children, createElement } from 'react';
/**
* Switch Component
*
@marlun78
marlun78 / .vimrc
Created July 25, 2018 11:45
My VIM config
View .vimrc
filetype plugin indent on
syntax on
set number
set tabstop=4
set shiftwidth=4
set expandtab
@marlun78
marlun78 / sample.js
Created July 19, 2018 12:45
Samples a given number of characters from a given string
View sample.js
// sample.js
// Samples a given number of characters from a given string.
// Example;
// sample('0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', 4); // Eg. 'uY7m'
function sample(characters, length) {
var result = '';
for (var i = 0; i < length; i++) {
result += getRandomChar(characters);
}
return result;
@marlun78
marlun78 / interpolate.js
Created July 19, 2018 12:25
Replaces placeholders in a string template with passed values
View interpolate.js
// interpolate.js
// Based on Crockford’s supplant (http://www.crockford.com/javascript/remedial.html)
// Example;
// interpolate('Hello {name}!', { name: 'Martin' }); // 'Hello Martin!'
// interpolate('Hello {0}!', ['Vanja']); // 'Hello Vanja!'
function interpolate(template, values) {
return template.replace(/\{([^{}]*)\}/g, function(match, key) {
const value = values[key];
const type = typeof value;
@marlun78
marlun78 / make-cancelable.js
Created October 26, 2017 07:07
An idea for promise cancelation (it doesn’t really cancel the promise, just make sure it never resolves or rejects)
View make-cancelable.js
// Just an idea, completely untested!
function makeCancelable(promise) {
let canceled = false;
const proxy = new Promise((resolve, reject) => {
promise.then(
(value) => canceled === false && resolve(value),
(error) => canceled === false && reject(error)
);
});
@marlun78
marlun78 / git-sync-masters.md
Last active September 19, 2017 13:18
View git-sync-masters.md 
git fetch upstream && git checkout master && git rebase upstream/master && git push origin master
@marlun78
marlun78 / move-props.js
Last active February 16, 2017 16:43
Move properties and their values from one object into another by mutating the source object.
View move-props.js
// const source = {name: 'Martin', age: 38};
// const target = moveProps(/name/, source);
// console.log(source, target); => {age: 38}, {name: 'Martin'}
export default function moveProps(pattern, source, target = {}) {
return Object.keys(source).reduce((accumulator, key) => {
if (pattern.test(key)) {
accumulator[key] = source[key];
delete source[key];
}
return accumulator;