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//
// Thanks to Matt Pocock's video "Enums considered harmful"
// https://www.youtube.com/watch?v=jjMbPt_H3RQ
//
// Please note that enums per se are great in any language,
// but TypeScript's enums are implemented in a convoluted and verbose way (as of version 4.9)
// since JavaScript (as of ES2022) does not natively support enums
//

// This can be moved elsewhere

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import { BehaviorSubject, Observable, takeUntil } from 'rxjs';

import { OnceSource } from './once-source';

export type UpdaterFn<T> = (prev: T) => T;

/**
 * # Data Source
 *
 * This wraps a data source in a RxJS BehaviorSubject and exposes an API for

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How to freeze files in Git

Frozen files are different that ignored files, so that

• Ignored files are listed in .gitignore and Git never picks them up
• Frozen files are previously committed files which are later ignored by Git

Frozen files can be configuration files that are frequently changed with secret values and should not be committed.

How to freeze files

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package main

import "fmt"

func main() {
	fmt.Println(
		BinaryStringToDecimal("0110"), // 6
		BinaryStringToDecimal("0011"), // 3
	)
}

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function range(fromOrTo: number, to?: number): number[] {
  const result: number[] = [];
  const [start, stop] = to ? [fromOrTo, to] : [0, fromOrTo];
  for (let i = start; i <= stop; i++) {
    result.push(i);
  }
  return result;
}

function elidedRange(total: number, current: number = 1, diameter: number = 5): (number | null)[] {

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import { SimpleChange } from '@angular/core';

export function didInputChange(change?: SimpleChange): boolean {
	if (!change) return false;
	return change.firstChange || change.currentValue !== change.previousValue;
}

export function didInputsChange(changes: SimpleChange[]): boolean {
	return changes.some(ch => didInputChange(ch));
}

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it('With promises and setTimeouts', fakeAsync(() => {
  let counter = 0;

  Promise.resolve().then(() => {
    counter += 10;
    setTimeout(() => counter += 1, 100);
  });

  expect(counter).toBe(0);
  flushMicrotasks(); // Run promises

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Git Gotchas

Rename a remote branch

git checkout OLD_NAME
git pull
git branch -m OLD_NAME NEW_NAME
git push --delete origin OLD_NAME
git push --set-upstream origin NEW_NAME

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// node ./test1.js --bool1 -2 --foo aa --bar=bb -f aaa -abc arg1 arg2
const climb = require('./climb');

const input = climb(process.argv, {
  bool1: {
    longName: 'bool1',
  },
  bool2: {
    longName: 'bool2',
    shortName: '2',

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/**
 * Coding Challenge: Intersecting rectangles
 * 
 * Write a function calculateRectanglesIntersection that accepts two rectangles
 * (in string format like "(0,0),(0,4),(6,4),(0,6)") and returns the value of
 * the intersection area
 */

const getRectangleCoordinates = (coordsInput) => {
  let temp = coordsInput.slice(1, coordsInput.length - 1);