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js compare arrays

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GutoTrosla answered on September 7, 2020 Popularity 10/10 Helpfulness 5/10

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js compare arrays

Comment

var a1 = [1,2,3];
var a2 = [1,2,3];
console.log(a1==a2);    // Returns false
console.log(JSON.stringify(a1)==JSON.stringify(a2));    // Returns true

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: stackoverflow.com

Tags: arrays compare javascript

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Contributed on Dec 02 2021

GutoTrosla

0 Answers Avg Quality 2/10

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how to compare arrays in javascript

Comment

const compareArrays = (a, b) =>
  a.length === b.length &&
  a.every((element, index) => element === b[index]);

let array1 = [11, 22, 33];
let array2 = [21, 22, 23];
let array3 = [11, 22, 33];

console.log(compareArrays(array1, array2)); //false
console.log(compareArrays(array1, array3)); //true

Popularity 9/10 Helpfulness 5/10 Language javascript

Source: www.freecodecamp.org

Tags: arrays ar

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Contributed on Jan 09 2023

Nwaegidi Wisdom

0 Answers Avg Quality 2/10

javascript compare arrays

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Array.prototype.equals = function(arr2) {
  return (
    this.length === arr2.length &&
    this.every((value, index) => value === arr2[index])
  );
};

[1, 2, 3].equals([1, 2, 3]);	// true
[1, 2, 3].equals([3, 6, 4, 2]);	// false

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: arrays ar

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Contributed on Oct 07 2020

garzj

0 Answers Avg Quality 2/10

compare two array in JavaScript

Comment

const compareArrays = (a, b) => {
  return JSON.stringify(a) === JSON.stringify(b);
};

let array1 = [11, 22, 33];
let array2 = [21, 22, 23];
let array3 = [11, 22, 33];

console.log(compareArrays(array1, array2)); //false
console.log(compareArrays(array1, array3)); //true

Popularity 9/10 Helpfulness 5/10 Language javascript

Source: www.freecodecamp.org

Tags: compare

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Contributed on Sep 24 2023

mary Richelle

0 Answers Avg Quality 2/10

how to compare two arrays javascript

Comment

function arraysAreIdentical(arr1, arr2){
    if (arr1.length !== arr2.length) return false;
    for (var i = 0, len = arr1.length; i < len; i++){
        if (arr1[i] !== arr2[i]){
            return false;
        }
    }
    return true; 
}

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: arrays ar

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Contributed on Sep 07 2020

Spotless Shrew

0 Answers Avg Quality 2/10

comparing two arrays in javascript

Comment

const arr1 = [1, 2, 3];
const arr2 = [1, 3, 3];

if (arr1.length !== arr2.length) return console.log("false");
for (let i = 0; i < arr1.length; i++) {
    for (let j = 0; j < arr2.length; j++) {
        if (arr1[i] === arr2[j]) {
            console.log("yes match", arr1[i], arr2[j]);
            continue;
        }
        console.log("no match", arr1[i], arr2[j]);
    }
}

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: arrays ar

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Contributed on Mar 02 2021

abhi

0 Answers Avg Quality 2/10

compare two array in javascript

Comment

let arr1 = [1, 4, 7, 4, 2, 3];
let arr2 = [1, 2, 3, 4, 7, 18];

const is_same = arr1.length == arr2.length &&
  (arr1.every((currElem)=>{
    if(arr2.indexOf(currElem)> -1){
      return (currElem == arr2[arr2.indexOf(currElem)]);
    }return false
  })
)
console.log(is_same)

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: www.30secondsofcode.org

Tags: compare

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Contributed on Nov 19 2021

Gentle Gerenuk

0 Answers Avg Quality 2/10

how to compare arrays in js

Comment

-1

// THE PROBLEM:
const firstArray = ["cookies", "milk", "chocolate"]
const secondArray = ["cookies", "milk", "chocolate"]
console.log(firstArray == secondArray) // always returns FALSE

// THE SOLUTION:
if(JSON.stringify(firstArray) === JSON.stringify(secondArray)){
  console.log("firstArray is the same as the secondArray")
} else {
  console.log("firstArray is different from the secondArray")
}

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: arrays ar

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Contributed on May 23 2022

The Stanliest Stanley

0 Answers Avg Quality 2/10

compare two arrays javascript

Comment

let equal = a.every(b.includes)

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: arrays compare compa

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Contributed on Aug 30 2023

Jolly Jay

0 Answers Avg Quality 2/10

How to compare arrays in JavaScript?

Comment

// Warn if overriding existing method
if(Array.prototype.equals)
    console.warn("Overriding existing Array.prototype.equals. Possible causes: New API defines the method, there's a framework conflict or you've got double inclusions in your code.");
// attach the .equals method to Array's prototype to call it on any array
Array.prototype.equals = function (array) {
    // if the other array is a falsy value, return
    if (!array)
        return false;

    // compare lengths - can save a lot of time 
    if (this.length != array.length)
        return false;

    for (var i = 0, l=this.length; i < l; i++) {
        // Check if we have nested arrays
        if (this[i] instanceof Array && array[i] instanceof Array) {
            // recurse into the nested arrays
            if (!this[i].equals(array[i]))
                return false;       
        }           
        else if (this[i] != array[i]) { 
            // Warning - two different object instances will never be equal: {x:20} != {x:20}
            return false;   
        }           
    }       
    return true;
}
// Hide method from for-in loops
Object.defineProperty(Array.prototype, "equals", {enumerable: false});

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: worcraft-algeria-dz.com

Tags: arrays ar

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Contributed on Aug 01 2022

thecodeteacher

0 Answers Avg Quality 2/10

js compare arrays

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