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listSumEvenIndexes
Return the sum of all the numbers at even positions in the array list. listSumEvenIndexes([1, 2, 3, 4]) → 4 listSumEvenIndexes([8, 16, 10]) → 18 listSumEvenIndexes([5, 0, -10]) → -5 ...Save, Compile, Run (ctrl-enter)  | 
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Difficulty: 10 Post-solution available
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