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Added file CheckIfArraySorted #33

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17 changes: 17 additions & 0 deletions src/concepts/CheckIfArraySorted.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
// Checking if array is sorted
// Working even elements are repeated

const isSort = arr => {
if (arr.length <= 1) return "Array is too small";
const idx = arr.findIndex( (val,id,arr) => val != arr[0]);
const AscDesc = arr[idx] - arr[idx-1];
for (let i = idx; i < arr.length; i++) {
if ((arr[i] - arr[i - 1]) * AscDesc < 0) return "Array not sorted";
}
return AscDesc > 0 ? "Array is sorted Ascending" : "Array is sorted Descending"
};



//example
console.log(isSort([1,1,1,3,4,7,9,57])); // "Array is sorted Ascending"