Foursquare.swift

private struct ParameterKeys {
    static let clientID = "client_id"
    static let clientSecret = "client_secret"
    static let version = "v"
    static let category = "categoryId"
    static let location = "ll"
    static let query = "query"
    static let limit = "limit"
    static let searchRadius = "radius"
}

private struct DefaultValues {
    static let version = "20160301"
    static let limit = "50"
    static let searchRadius = "2000"
}