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First solution in Clear category for Sum by Type by Dmitry_Sternyaev
import assert from "assert";
/**
* @param {Array} values
*/
function sumByTypes(values) {
// your code here
return values.reduce(
(sum, val) =>
typeof val === "string" ? [sum[0] + val, sum[1]] : [sum[0], sum[1] + val],
["", 0]
);
}
console.log("Example:");
console.log(sumByTypes([]));
// These "asserts" are used for self-checking
assert.deepEqual(sumByTypes([]), ["", 0]);
assert.deepEqual(sumByTypes([1, 2, 3]), ["", 6]);
assert.deepEqual(sumByTypes(["1", 2, 3]), ["1", 5]);
assert.deepEqual(sumByTypes(["1", "2", 3]), ["12", 3]);
assert.deepEqual(sumByTypes(["1", "2", "3"]), ["123", 0]);
assert.deepEqual(sumByTypes(["size", 12, "in", 45, 0]), ["sizein", 57]);
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May 20, 2020
