CODEWITHSUNDEEP
javascriptencapsulation
gnidoc
gnidoc

Reputation: 47

Create many instances with module pattern

I have two files:

let WordPair = function(wordA, wordB) {
  function doSomething() { ... };

  const smth = wordA + wordB;
  return {doSomething, smth};
};
module.exports = WordPair;

-

let wordpair = require('./WordPair.js')('dog', 'cat');
wordpair.doSomething();

Now that works fine, but what I want to do is creating many instances of WordPair, for example like this:

let arr = [];
for (let i = 0; i < 10; i++) {
  arr.push(new WordPair('xyz', 'abc'));
}

In other words: How you would use instances of a class in Java. What's the correct way to achieve this in Javascript?

Upvotes: 0

Views: 44

Answers (1)

Ken Yip
Ken Yip

Reputation: 761

in javascript, you can use prototype pattern to achieve that

suppose doSomething is class method that combine the wordA and wordB

function WordPair(wordA, wordB){
    this.wordA = wordA;
    this.wordB = wordB;
}

WordPair.prototype.doSomething = function(){
    const something = this.wordA + this.wordB;
    console.log(something);
}

const wordPair = new WordPair('xyz', 'abc');

wordPair.doSomething();

or more es6 class way

class WordPair {

    constructor(wordA, wordB){
        this.wordA = wordA;
        this.wordB = wordB;
    }

    doSomething(){
        const something = this.wordA + this.wordB;
        console.log(something);
    }

}

const wordPair = new WordPair('xyz', 'abc');

wordPair.doSomething();

Upvotes: 1

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