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evenLast
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"use strict"; | |
// evenLast :: [Number] -> Number | |
function evenLast(data) { | |
if (data.length < 1) { | |
return 0; | |
} else { | |
var isEven = function isEven(n) { | |
if (n === 0) { | |
return true; | |
} else if (n === 1) { | |
return false; | |
} else { | |
return isEven(n - 2); | |
} | |
}; | |
var filtered = data.filter(isEven); | |
var sum = filtered.reduce(function(prev, curr) { | |
return prev + curr; | |
}, 0); | |
} | |
return sum * data[data.length - 1]; | |
} | |
var assert = require('assert'); | |
var test1 = evenLast([0, 1, 2, 3, 4, 5]); | |
var test2 = evenLast([1, 3, 5]); | |
var test3 = evenLast([6]); | |
var test4 = evenLast([]); | |
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