118. Pascal's Triangle.swift

func generate(numRows: Int) -> [[Int]] {
        var results = [[Int]]()
        if (numRows == 0) {
            return results
        }
        for i in 0..<numRows {
            var currentResults = [Int]()
            for j in 0...i {
                if (i > 1 && j > 0 && j < i) {
                    let value = results[i-1][j] + results[i-1][j-1]
                    currentResults.append(value)
                } else {
                    currentResults.append(1)
                }
            }
            results.append(currentResults)
        }
        return results
    }