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1. sum_even.js sum_even.js

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   function sum_even(a){

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     var sum = 0;

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     for (var i = 0; i < a.length; i++){

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       if(a[i] % 2 === 0){

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         sum += a[i];

2. some.go some.go

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   type ConditionIterator func(interface{}, int) bool

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   func Some(array []interface{}, iterator ConditionIterator) bool {

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   	res := false

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   	for index, data := range array {