rostegg

Create two Azure Functions:

Public IP

After receiving GET request, return to the user his public ip, not using any third-party service (it can be received from request headers, google how)

Response type, structure, etc at your own discretion

Image metadata extractor

rostegg

C#, .NET and ASP.NET Roadmap

C# and basics

Useful links:

• Metanit C# tutorial
• Metanit patterns
• Metanit algorithms
• Microsoft tutorials

rostegg

const benchmark = (func, input, iterations) => {
  const start = performance.now()
  for (let i = 0; i < iterations; i++) {
    func(...input)
  }
  const finish = performance.now()
  const time = finish - start
  return { 
    time,
    aproxOperation: (time/iterations)

rostegg

function groupSkip(arr, shift, skip = 1) {
    const res = []
    let limit = 0
    while (limit+shift <= arr.length) {
      res.push(arr.slice(limit, shift + limit - skip))
      limit += shift
    }
    return res
}

rostegg

const getImageDataFromUrl = (url, callback) => {
	const canvas = document.createElement("canvas")
	const context = canvas.getContext("2d")
	
	const image = new Image()
	
	image.onload = async () => {
		const { width, height } = image
		const { data: imageData } = context.getImageData(0, 0, width, height)
		callback(imageData)

rostegg

let range = {
  from: 1,
  to: 5,

  [Symbol.asyncIterator]() {
    return {
      current: this.from,
      last: this.to,

      async next() {

rostegg

const withResource = async (fn) => {
	const instance = await getInstance()
	try {
		return await fn(instance)
	} finally {
		await instance.close()
	}
}

const task = await witchResource(async (instance) => {

rostegg

/*
Example:
    const arr = [1,2,3,4,5,7,8]
    arr.subarrayFromIndexes([0,77,3,5,15])
*/
Array.prototype.subarrayFromIndexes = function (indexes) {
    if (!Array.isArray(this))
        throw "indexes must be array"
    
    return indexes.reduce((acc, current) => {

rostegg

/*
    const toCurryFn = (...args) => {...}
    const curried = curry(toCurryFn);
    ...
*/

function curry(fn) {
    const argumentsArray = [];

    function subCurry(...args) {

rostegg

/*
  Just experiments and some thoughts.
  Better use for/foreach over arrays and check if target arr already contains objects, something like:
  
  const target = [...one]

  for (current of two) {
    const duplicated = target.find(item => item.id === current.id);

    !duplicated && target.push(current);