Javascript's Console functions in Swift.

Console.swift

// Fuck it.

private func makeString(prefix: String? = nil, values: [Any]) -> String {
    var str = prefix ?? ""
    for val in values {
        str += "\(val) "
    }
    return str
}

public final class Console {
    
    private var timesTable: [String : CFTimeInterval] = [:]
    private var labels: [String : Int] = [:]
    
    @discardableResult
    func log(_ vals: Any...) -> Self {
        print(makeString(values: vals))
        return self
    }
    
    @discardableResult
    func count(_ label: String) -> Self {
        if let count = labels[label] {
            labels[label] = count + 1
            print("\(label): \(count + 1)")
        }
        else {
            labels[label] = 1
            print("\(label): 1")
        }
        return self
    }
    
    @discardableResult
    func info(_ vals: Any...) -> Self {
        print(makeString(prefix: "ℹ️", values: vals))
        return self
    }
    
    @discardableResult
    func warn(_ vals: Any...) -> Self {
        print(makeString(prefix: "⚠️", values: vals))
        return self
    }
    
    @discardableResult
    func error(_ vals: Any...) -> Self {
        print(makeString(prefix: "🛑", values: vals))
        return self
    }
    
    @discardableResult
    func time(_ label: String) -> Self {
       timesTable[label] = CACurrentMediaTime()
        return self
    }
    
    @discardableResult
    func timeEnd(_ label: String) -> Self {
        if let time = timesTable[label] {
            let now = CACurrentMediaTime()
            print("🕐 \(now - time)")
        }
        return self
    }
    
}

public let console = Console()