andreasvirkus

const calculatePages = (length: number, current: number, total: number) => {
  if (length === 0) return []
  if (length === 1) return [current]
  if (total <= length + 4) return Array.from({ length: total }, (_v, i) => i + 1)
  const jumpSize = Math.ceil(length / 2)
  const centerStart = Math.min(Math.max(current - (length - jumpSize), 3), total - length - 1)
  const jumpStart = current <= length + 1 ? 2 : `-${jumpSize}`
  const jumpEnd = current >= total - length ? total - 1 : `+${jumpSize}`
  return [1, jumpStart, ...Array.from({ length }, (_v, i) => centerStart + i), jumpEnd, total]
}

andreasvirkus

// Defaults
const defaultOptions = {
  format: 'image/png',
  quality: 0.92,
  width: undefined,
  height: undefined,
  Canvas: undefined
}

const createCanvas = options => (options.Canvas ? new options.Canvas() : window.document.createElement('canvas'))

andreasvirkus

export const convertTextToImage = (context, text, font = 'normal normal 24px cursive', color = '#000000') => {
  context.font = font
  context.fillStyle = color
  context.fillText(text, 0, 10)
  context.canvas.width = context.measureText(text).width
  return context.canvas.toDataURL()
}

andreasvirkus

export const screenshot = (canvasRef, base, avatar) => {
  const ctx = canvasRef.getContext('2d')
  const imageObj1 = new Image()
  const imageObj2 = new Image()
  imageObj1.src = base.src
  imageObj1.onload = () => {
    ctx.drawImage(imageObj1, 0, 0, base.height, base.width)
    imageObj2.src = avatar.src
    imageObj2.onload = () => {
      ctx.drawImage(imageObj2, avatar.left, avatar.top, avatar.height, avatar.width)

andreasvirkus

package main

import (
	"fmt"
	"math"
)

const round = 1000000.0

func Sqrt(x float64) float64 {

andreasvirkus

javascript:(()=>{const e=new Date,t=(e.getDate()+'').padStart(2,'0'),l=e.getMonth()+1;let n=`https://elron.pilet.ee/et/otsing/Tondi/Pääsküla/${`${e.getFullYear()}-${l}-${t}`}`;location.href=n})();

andreasvirkus

onKeydown(e) {
  const { toggleSidebar, next, previous } = this.props;

  const keyMapping = new Map([
    [ 83, toggleSidebar ],  // user presses the s button
    [ 37, next          ],  // user presses the right arrow
    [ 39, previous      ]   // user presses the left arrow
  ]);

  if (keyMapping.has(e.which)) {

andreasvirkus

/**
 * Uses the Durstenfeld shuffle algorithm,
 * a modern optimized version of the Fisher-Yates
 * (aka Knuth) shuffle.
 *
 * http://en.wikipedia.org/wiki/Fisher-Yates_shuffle#The_modern_algorithm
 *
 * @param  {Array} Array to shuffle
 * @return {Array} Shuffled array
 */

andreasvirkus

console.log('%c 👋 Salutations, hax0r.\nFeel free to look around. FYI, you\'ll have a better view of the code over at GitHub: \nhttps://github.com/andreasvirkus/cottage', 'background: #223; color: #bada55');

andreasvirkus

// Needs spread operator (... notation)
export const promisify = (fn) => {
  return (...args) => {
    return new Promise((resolve, reject) => {
      fn(...args, (err, res) => {
        if (err) return reject(err)
        return resolve(res)
      })
    })
  }