Initial data commit

Task/Matrix-multiplication/Swift/matrix-multiplication.swift

@@ -0,0 +1,59 @@
+@inlinable
+public func matrixMult<T: Numeric>(_ m1: [[T]], _ m2: [[T]]) -> [[T]] {
+  let n = m1[0].count
+  let m = m1.count
+  let p = m2[0].count
+
+  guard m != 0 else {
+    return []
+  }
+
+  precondition(n == m2.count)
+
+  var ret = Array(repeating: Array(repeating: T.zero, count: p), count: m)
+
+  for i in 0..<m {
+    for j in 0..<p {
+      for k in 0..<n {
+        ret[i][j] += m1[i][k] * m2[k][j]
+      }
+    }
+  }
+
+  return ret
+}
+
+@inlinable
+public func printMatrix<T>(_ matrix: [[T]]) {
+  guard !matrix.isEmpty else {
+    print()
+
+    return
+  }
+
+  let rows = matrix.count
+  let cols = matrix[0].count
+
+  for i in 0..<rows {
+    for j in 0..<cols {
+      print(matrix[i][j], terminator: " ")
+    }
+
+    print()
+  }
+}
+
+let m1 = [
+  [6.5, 2, 3],
+  [4.5, 1, 5]
+]
+
+let m2 = [
+  [10.0, 16, 23, 50],
+  [12, -8, 16, -4],
+  [70, 60, -1, -2]
+]
+
+let m3 = matrixMult(m1, m2)
+
+printMatrix(m3)