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Different Types of Functions in JavaScript

Md. Jamal Uddin on November 03, 2018

Different Types of Functions in JavaScript Photo by Markus Spiske on Unsplash A JavaScript function is a block of code designed to per...
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Guillaume Martigny •

Nice article. Small comment, on the third arrow function example, when you write :

const noise2 = _ => console.log("Pling");
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There's an unused parameter named _ instead of no parameter. Both are valid anyway, just wanted to point out the difference ;)

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Md. Jamal Uddin •

Yeah! It's intentional. Only for showing variation. Thanks so much for your comment.

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David Wickes • • Edited

Very comprehensive!

Couple of typos:

Your default parameters examples has ; instead of , between the arguments

const multiply = (a = 2, b = 3, c = 1) => a * b * c;
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You're missing a ' on your new Function example:

var sum = new Function('a', 'b', 'return a + b');
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(I love that you introduce the Function constructor by the way - hours of fun for everyone there)

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Md. Jamal Uddin • • Edited

Bull's eye man! truly I have read my post more than 10 times :) and two of my friends proofread it but no one figured it out. I will be more prepared next time. thanks.

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Waqar Mohammad •

Nice article dude. Your English is great too. Keep it up

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Md. Jamal Uddin •

Thanks

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Thomas Bishop •

Very helpful article and admirably free of waffle. Nice work :)

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Md. Jamal Uddin •

Thanks

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Tamal Anwar Chowdhury •

Very in depth and helpful.

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Md. Jamal Uddin •

Thanks man!😍

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victordeflos •

i am a beginner in coding i am currently finishing frond end courses and for the final test i need an idea to be able to make some program in react. please help or some page on the web where I could find examples and printed codes. thank you very much

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Md Abu Taher •

Go forth!

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Md. Jamal Uddin •

Thanks bro 😍 to see you here.

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Álvaro Cáceres Muñoz •

Nice article! You managed to make me understand generators for the first time XD.

By the way, could you please give me a practical use case of the Function consctructor? Thank you

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Md. Jamal Uddin •

here is an example Function constructor with implementing a class and you know JavaScript class is a syntactic sugar over the function structure.


class Animal {
  constructor(name, energy) {
    this.name = name
    this.energy = energy
  }
  eat(amount) {
    console.log(`${this.name} is eating.`)
    this.energy += amount
  }
  sleep() {
    console.log(`${this.name} is sleeping.`)
    this.energy += length
  }
  play() {
    console.log(`${this.name} is playing.`)
    this.energy -= length
  }
}

const leo = new Animal('Leo', 7)

wanna know more, please check out this stackoverflow thread

Thanks!

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victordeflos •

and whether there is a torrent site for developers or a community.