File size: 1,913 Bytes
0936134 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | // Add the finished solution here when you receive it.
function sum(array) {
return array.reduce((a,b) => a + b);
};
function mean(array) {
return sum(array) / array.length;
};
function median(array) {
var arr = array.sort(function(a, b){return a-b});
if (arr.length % 2 === 0) {
return mean([arr[arr.length/2], arr[(arr.length/2)-1]])
} else {
return arr[Math.floor(arr.length/2)]
}
};
// __________________________________________
// Tests: Do not alter code below this line.
oddLengthArray = [1, 2, 3, 4, 5, 5, 7]
evenLengthArray = [4, 4, 5, 5, 6, 6, 6, 7]
function assert(test, message, test_number) {
if (!test) {
console.log(test_number + "false");
throw "ERROR: " + message;
}
console.log(test_number + "true");
return true;
}
// tests for sum
assert(
(sum instanceof Function),
"sum should be a Function.",
"1. "
)
assert(
sum(oddLengthArray) === 27,
"sum should return the sum of all elements in an array with an odd length.",
"2. "
)
assert(
sum(evenLengthArray) === 43,
"sum should return the sum of all elements in an array with an even length.",
"3. "
)
// tests for mean
assert(
(mean instanceof Function),
"mean should be a Function.",
"4. "
)
assert(
mean(oddLengthArray) === 3.857142857142857,
"mean should return the average of all elements in an array with an odd length.",
"5. "
)
assert(
mean(evenLengthArray) === 5.375,
"mean should return the average of all elements in an array with an even length.",
"6. "
)
// tests for median
assert(
(median instanceof Function),
"median should be a Function.",
"7. "
)
assert(
median(oddLengthArray) === 4,
"median should return the median value of all elements in an array with an odd length.",
"8. "
)
assert(
median(evenLengthArray) === 5.5,
"median should return the median value of all elements in an array with an even length.",
"9. "
) |