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Kaotik answered on January 18, 2020 Popularity 10/10 Helpfulness 2/10

answer es6 closures

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var makeCounter = function() {
  var privateCounter = 0;
  function changeBy(val) {
    privateCounter += val;
  }
  return {
    increment: function() {
      changeBy(1);
    },
    decrement: function() {
      changeBy(-1);
    },
    value: function() {
      return privateCounter;
    }
  }
};

var counter1 = makeCounter();
var counter2 = makeCounter();
alert(counter1.value()); /* Alerts 0 */
counter1.increment();
counter1.increment();
alert(counter1.value()); /* Alerts 2 */
counter1.decrement();
alert(counter1.value()); /* Alerts 1 */
alert(counter2.value()); /* Alerts 0 */

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: developer.mozilla.org

Tags: closures javascript

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Contributed on Feb 20 2020

Kaotik

0 Answers Avg Quality 2/10

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closures in javascript

Comment

// A closure is a function having access to the parent scope, 
// even after the parent function has popped.

function greeting() {
    let message = 'Hi';

    function sayHi() {
        console.log(message);
    }

    return sayHi;
}
let hi = greeting();
hi(); // still can access the message variable

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: www.javascripttutorial.net

Tags: closures closure

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Contributed on Feb 01 2022

madhav

0 Answers Avg Quality 2/10

javascript closure

Comment

function makeAdder(x) {
  return function(y) {
    return x + y;
  };
}

var add5 = makeAdder(5);
var add10 = makeAdder(10);

console.log(add5(2));  // 7
console.log(add10(2)); // 12

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jan 18 2020

Grieving Goshawk

0 Answers Avg Quality 2/10

Closures in javascript

Comment

let counter = (function() {
    let i = 0; // private property

    return {   // public methods
        get: function() {
            alert(i);
        },
        set: function(value) {
            i = value;
        },
        increment: function() {
            alert(++i);
        }
    };
})(); // module

counter.get();      // shows 0
counter.set(6);
counter.increment(); // shows 7
counter.increment(); // shows 8

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: en.wikipedia.org

Tags: closures closure

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Contributed on Apr 29 2022

Ali Salman

0 Answers Avg Quality 2/10

Javascript Closure

Comment

function makeFunc() {
  var name = 'Mozilla';
  function displayName() {
    alert(name);
  }
  return displayName;
}

var myFunc = makeFunc();
myFunc();

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

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Contributed on Jun 17 2022

Peter Ime

0 Answers Avg Quality 2/10

javascript closure

Comment

function makeAdder(x) {
  return function(y) {
    return x + y;
  };
}

var add5 = makeAdder(5);
var add10 = makeAdder(10);

console.log(add5(2));  // 7
console.log(add10(2)); // 12

//my words: what this code do is basically a nested function that will return
//its inner function (un-activated). So var add5 in line 7 activated the outer
//function with 5 as parameter which makes add5 is now the nameless function at
//line 2 that will return 5 + y;

//MDN words:
//add5 and add10 are both closures. They share the same function body
//definition, but store different lexical environments. In add5's lexical
//environment, x is 5, while in the lexical environment for add10, x is 10.

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

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Contributed on Jan 20 2022

Graceful Grivet

0 Answers Avg Quality 2/10

js closure examples

Comment

function outer() {
  var counter = 0; // Backpack or Closure
  function incrementCounter() {
    return counter++;
  }
  return incrementCounter;
}

const count = outer();
count(); // 0
count(); // 1
count(); // 2

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on May 17 2021

Obviously you're not a golfer.

0 Answers Avg Quality 2/10

js closure

Comment

// global scope
var e = 10;
function sum(a){
  return function(b){
    return function(c){
      // outer functions scope
      return function(d){
        // local scope
        return a + b + c + d + e;
      }
    }
  }
}

console.log(sum(1)(2)(3)(4)); // log 20

// You can also write without anonymous functions:

// global scope
var e = 10;
function sum(a){
  return function sum2(b){
    return function sum3(c){
      // outer functions scope
      return function sum4(d){
        // local scope
        return a + b + c + d + e;
      }
    }
  }
}

var sum2 = sum(1);
var sum3 = sum2(2);
var sum4 = sum3(3);
var result = sum4(4);
console.log(result) //log 20

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

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Contributed on Jul 12 2021

Selfish Shrike

0 Answers Avg Quality 2/10

JavaScript Closures

Comment

function outerFunction() {
  var outerVariable = 'I am from the outer function';

  function innerFunction() {
    console.log(outerVariable);
  }

  return innerFunction;
}

var closure = outerFunction();
closure(); // Output: 'I am from the outer function'

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: chat.openai.com

Tags: closures closure

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Contributed on Jun 16 2023

Asim Ehmedov

0 Answers Avg Quality 2/10

JavaScript Closures

Comment

// javascript closure example

// outer function
function greet() {
    // variable defined outside the inner function
    let name = 'John';
    // inner function
    function displayName() {

        // accessing name variable
        return 'Hi' + ' ' + name;
      
    }
    return displayName;
}

const g1 = greet();
console.log(g1); // returns the function definition
console.log(g1()); // returns the value

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: closures closure

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Contributed on May 22 2022

SAMER SAEID

0 Answers Avg Quality 2/10

es6 closures

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