neysidev

[
  { "id": 1, "name": "Berlin Hbf", "city": "Berlin", "lat": 52.5251, "lng": 13.3694 },
  { "id": 2, "name": "Berlin Ostbahnhof", "city": "Berlin", "lat": 52.5108, "lng": 13.4348 },
  { "id": 3, "name": "Berlin Südkreuz", "city": "Berlin", "lat": 52.475, "lng": 13.365 },
  { "id": 4, "name": "Hamburg Hbf", "city": "Hamburg", "lat": 53.553, "lng": 10.0067 },
  { "id": 5, "name": "Hamburg Altona", "city": "Hamburg", "lat": 53.5526, "lng": 9.935 },
  { "id": 6, "name": "Hamburg Dammtor", "city": "Hamburg", "lat": 53.5603, "lng": 9.9886 },
  { "id": 7, "name": "Munich Hbf", "city": "Munich", "lat": 48.1402, "lng": 11.5586 },
  { "id": 8, "name": "Munich Ost", "city": "Munich", "lat": 48.1277, "lng": 11.6034 },
  { "id": 9, "name": "Munich Pasing", "city": "Munich", "lat": 48.1499, "lng": 11.4616 },

neysidev

function calculateAngle(point1, point2) {
  const angleInRadians = Math.atan2(point2.y - point1.y, point2.x - point1.x);
  const angleInDegrees = (angleInRadians * 180) / Math.PI;
  return angleInDegrees;
}

neysidev

function getStd(array) {
  const n = array.length;
  const mean = array.reduce((a, b) => a + b) / n;
  return Math.sqrt(
    array.map(x => Math.pow(x - mean, 2)).reduce((a, b) => a + b) / n
  );
}

neysidev

function findLineEquation(point1, point2) {
  const slope = (point2.y - point1.y) / (point2.x - point1.x);
  const yIntercept = point1.y - slope * point1.x;
  return { slope, yIntercept };
}

function findCorrespondingY(point1, point2, x) {
  const lineEquation = findLineEquation(point1, point2);
  return lineEquation.slope * x + lineEquation.yIntercept;
}

neysidev

// https://stackoverflow.com/questions/4959975/generate-random-number-between-two-numbers-in-javascript

function randomIntFromInterval(min, max) { // min and max included 
  return Math.floor(Math.random() * (max - min + 1) + min)
}

const rndInt = randomIntFromInterval(1, 6)
console.log(rndInt)

neysidev

import { useState } from "react";
const { REACT_APP_API_URL, REACT_APP_API_VERSION } = process.env;

const buildUrl = (pathname, query) => {
  const apiUrl = `${REACT_APP_API_URL}api/v${REACT_APP_API_VERSION}`;
  const url = new URL(apiUrl + pathname);

  Object.keys(query).forEach(queryKey =>
    url.searchParams.set(queryKey, query[queryKey].toString())
  );

neysidev

function getFields(array, fields = []) {
  return array.map(item =>
    fields.length === 1
      ? item[fields[0]]
      : new Array(fields.length).fill(null).map((_, i) => item[fields[i]])
  )
}

// How to use?
const arr = [{ id: 1, name: "Steve" }, { id: 2, name: "Bill" }]

neysidev

const sleep = ms => {
  return new Promise(resolve => {
    setTimeout(resolve, ms);
  })
}

// How to use?
await sleep(5000)

neysidev

import _ from "lodash"
import { formatBytes } from "./format" // https://gist.github.com/neysidev/71d6100023c4359a5cff256f2601c333

const openBrowseWindow = ({
  accept = [],
  multiple = false,
  onChange = () => {},
}) => {
  // Initialize the file input
  const input = document.createElement("input")

neysidev

const fs = require("fs")

fs.readFile("input.csv", "utf8", (err, data) => {
  if (err) return console.log(err)

  const content = []
  data.split("\n").forEach(line => {
    content.push(line.split(","))
  })