20 JavaScript Array and Object Methods to make you a better developer — Syntax Podcast 043

A Tasty Treats Podcast for Web Developers.

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Wes Bos

Wes Bos

Full Stack JavaScript Developer. Creator of really good web development courses. BBQ enthusiast.

Scott Tolinski

Scott Tolinski

Web Developer, Creator of Level Up Tuts, Bboy, Robotops Crew and Youtuber

Playing: 043: 20 JavaScript Array and Object Methods to make you a better developer

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LOUDNESS

Apr 25th, 2018

20 JavaScript Array and Object Methods to make you a better developer

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Wes and Scott rattle through ~20 different Object and Array Methods that will make you a better JavaScript developer.

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Show Notes

For the docs for all these, just google mdn and the method you are looking for 😃

3:00

  • Why are these great?
  • They are chainable
  • Immutable

5:30

  • .filter()
  • Truthy or Falsy

8:00

  • .map()

10:00

  • .reduce() - returns any shape! filter, create a new shape, add up numbers...

14:30

  • .forEach()
  • Side effects

16:00

  • .some()
  • can be used as a short circuit forEach

25:00

  • .every()
  • .includes() (why not contains?)

26:00

  • Array.from()
  • Array.from() takes a secondary map arg
  • Array.of()

29:00

  • Object.values()
  • Object.keys()
  • Object.entries()

32:00

  • Array spread - converts iterable to array
  • Array spread - Concats arrays
  • Array Spread + Slice. Don't splice - remove an item from an array.

34:00

  • Object Spread

37:00

  • Function Rest

39:00

  • Object.freeze()

40:00

  • Object.seal()

41:00

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