### 012 Are Similar

```/**
*
* Ashish Patel
* e: ashishsushilPatel@gmail.com
* w: https://ashish.me
*
*/

/* Two arrays are called similar if one can be obtained from another by swapping at most one pair of elements in one of the arrays.

Given two arrays a and b, check whether they are similar.

Example

For a = [1, 2, 3] and b = [1, 2, 3], the output should be areSimilar(a, b) = true.
The arrays are equal, no need to swap any elements.

For a = [1, 2, 3] and b = [2, 1, 3], the output should be areSimilar(a, b) = true.
We can obtain b from a by swapping 2 and 1 in b.

For a = [1, 2, 2] and b = [2, 1, 1], the output should be areSimilar(a, b) = false.
Any swap of any two elements either in a or in b won't make a and b equal.
*/

function areSimilar(arr1, arr2) {
let arr1NotEqualNumbers = []
let arr2NotEqualNumbers = []
if (arr1.length !== arr2.length) {
return false
}
if (arr1.toString() === arr2.toString()) {
return true
}
for (let index = 0; index < arr1.length; index++) {
if (arr1[index] !== arr2[index]) {
arr1NotEqualNumbers.push(arr1[index])
arr2NotEqualNumbers.push(arr2[index])
}
}
arr2NotEqualNumbers = arr2NotEqualNumbers.reverse()

if (arr1NotEqualNumbers.length === 2 && arr1NotEqualNumbers.toString === arr2NotEqualNumbers.toString) {
return true
}
return false
}

test('are Similar', () => {
expect(areSimilar([1, 2, 3], [1, 2, 3])).toEqual(true)
expect(areSimilar([1, 2, 3], [2, 1, 3])).toEqual(true)
expect(areSimilar([1, 2, 2], [2, 1, 1])).toEqual(false)
})```

Created 2019-12-07T17:23:15+05:18 · Edit