MoodyBones

HTML
- Semantic HTML
- Event delegation
- Accessibility / ARIA

CSS
- Specificity
- Pseudo-elements
- Pseudo-selectors
- Combinators

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Data Structures
- Stacks
- Queues
- Linked lists
- Graphs
- Trees
- Tries

Concepts
- Big O Notation

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const arr = N => Array.from({ length: N }, (_, i) => i)

// Notice that the first parameter of the function is the "length" just as when you get the arr.length , you define it. 
// And the second parameter is the mapping function. 
// Since our new array does not have items within it, we skip the first argument with _ and take the index i to return it => i as it will follow the linear increasing logic 0, 1, 2...

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function diffArray(arr1, arr2) {
  return [...arguments].reduce((a, c) => {
    if (!arr1.includes(c) || !arr2.includes(c)) { a.push(c) }
    return a
  }, [])
}

console.log(diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5])) // [ 4 ]

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function destroyer(arr) {
  const destroyArgs = [...arguments].slice(1)

  return arguments[0].filter((val) => {
    return !destroyArgs.includes(val)
  })
}

// const destroyer = (arr, ...valsToRemove) => arr.filter(elem => !valsToRemove.includes(elem));

MoodyBones

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

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const countBits = (n) =>  n.toString(2).split('').filter(e => e === '1').length

MoodyBones

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

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function shuffle(array) {
  for (let i = array.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1))
    ;[array[i], array[j]] = [array[j], array[i]]
  }
  return array
}

// Snippet by Sarah Drasner
// More shuffling ---> https://bost.ocks.org/mike/shuffle/

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    columnHeadingMap() {
      return this.columnKeys.reduce((acc, curr, index) => {
        acc[curr] = this.germanValues[index]
        return acc
      }, {})
    },
      
//       maps/reduces 2 arrays into an new object
//       vue computed