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First solution in Clear category for Sum by Type by abvas
import assert from "assert";
function sumByTypes(values: Array): [string, number] {
return values.reduce(
([str, num], i) =>
typeof i === "string" ? [str + i, num] : [str, num + i],
["", 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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June 23, 2020
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