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Lesson_004_PermCheck.js

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const PermCheck = {

solution: function(A) {

let complete = Array.from(Array(A.length)).map((v,i) => i+1)

if (complete.toString() == A.sort((a,b) => a-b).toString()) {

return 1

} else {

return 0

}

}

}

result = PermCheck.solution([4, 1, 3, 2])

console.log(`${result}, pass: ${result == 1}`)

result = PermCheck.solution([4, 1, 3])

console.log(`${result}, pass: ${result == 0}`)

// TESTED AND PASSED ON Codility