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26 lines
943 B
JavaScript
26 lines
943 B
JavaScript
/* Kadane's algorithm is one of the most efficient ways to
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* calculate the maximum contiguous subarray sum for a given array.
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* Below is the implementation of Kadane's algorithm along with
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* some sample test cases.
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* There might be a special case in this problem if al the elements
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* of the given array are negative. In such a case, the maximum negative
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* value present in the array is the answer.
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*
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* Reference article :- https://www.geeksforgeeks.org/largest-sum-contiguous-subarray/
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*/
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export function kadaneAlgo (array) {
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let cumulativeSum = 0
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let maxSum = Number.NEGATIVE_INFINITY // maxSum has the least possible value
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for (let i = 0; i < array.length; i++) {
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cumulativeSum = cumulativeSum + array[i]
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if (maxSum < cumulativeSum) {
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maxSum = cumulativeSum
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} else if (cumulativeSum < 0) {
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cumulativeSum = 0
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}
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}
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return maxSum
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// This function returns largest sum contiguous sum in a array
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}
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