is dual array

Lonely Lapwing answered on December 20, 2021 Popularity 8/10 Helpfulness 1/10

answer is dual array

is dual array

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Dual array
  Define a Dual array to be an array where every value occurs exactly twice. For example, {1, 2, 1, 3, 3, 2} is a dual array.The following arrays are not Dual arrays {2, 5, 2, 5, 5} (5 occurs three times instead of two times) {3, 1, 1, 2, 2} (3 occurs once instead of two times) Write a javascript function named isDual that returns 1 if its array argument is a Dual array. Otherwise it returns 0.

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Contributed on Dec 20 2021

Lonely Lapwing

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is dual array

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