Flatten and Zip

025_flatten_zip.cell

// ============================================================================
// 025 — Flatten and Zip
// ============================================================================
// flatten() merges nested lists; zip() pairs up two lists.
//
// Run:   soma run 025_flatten_zip.cell run
// Expect:
//   nested: [[1, 2], [3, 4], [5, 6]]
//   flat: [1, 2, 3, 4, 5, 6]
//   zipped: [{"left": "a", "right": 1}, {"left": "b", "right": 2}, {"left": "c", "right": 3}]
//   a = 1
//   b = 2
//   c = 3

cell FlattenZip {

    on run() {
        // Nested list (list of lists)
        let nested = list(list(1, 2), list(3, 4), list(5, 6))
        print("nested: {nested}")

        // flatten() merges one level of nesting
        let flat = flatten(nested)
        print("flat: {flat}")

        // zip() pairs corresponding elements from two lists
        let keys = list("a", "b", "c")
        let vals = list(1, 2, 3)
        let zipped = zip(keys, vals)
        print("zipped: {zipped}")

        // Each zipped element has .left and .right
        for pair in zipped {
            print("{pair.left} = {pair.right}")
        }

        return "done"
    }
}