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Checking for the similarity of two 2-D arrays in JavaScript
We are required to write a JavaScript function that takes in two 2-D arrays and returns a boolean based on the check whether the arrays are equal or not. The equality of these arrays, in our case, is determined by the equality of corresponding elements.
Both the arrays should have same number of rows and columns. Also, arr1[i][j] === arr2[i][j] should yield true for all i between [0, number of rows] and j between [0, number of columns]
Example
The code for this will be −
const arr1 = [
[1, 1, 1],
[2, 2, 2],
[3, 3, 3],
];
const arr2 = [
[1, 1, 1],
[2, 2, 2],
[3, 3, 3],
];
const areEqual = (first, second) => {
const { length: l1 } = first;
const { length: l2 } = second;
if(l1 !== l2){
return false;
};
for(let i = 0; i < l1; i++){
for(j = 0; j < first[i].length; j++){
if(first[i][j] !== second[i][j]){
return false;
};
};
};
return true;
};
console.log(areEqual(arr1, arr2));Output
The output in the console −
true
Updated on: 15-Oct-2020
109 Views
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