(Swift 3,4,5...) Keeping Query Params in a Hashtable

Demonstrates how to use a Chilkat Hashtable to hold query params and re-emit as a query param string.

Note: The ToQueryString method was added in Chilkat v9.5.0.92.

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func chilkatTest() {
    let ht = CkoHashtable()!
    var success: Bool

    // Add name/value pairs from an existing query param string where the values are already URL encoded.
    var qp: String? = "txt=this%20is%20a%20test&color=blue&fruits=apples%26oranges"
    success = ht.addQueryParams(qp)

    // Add some additional name/value pairs.
    ht.addStr("name", value: "Jack Sparrow")
    ht.addStr("movie", value: "Pirates of the Carribean")

    // Iterate over the hash table to show what we have..

    let keys = CkoStringTable()!
    ht.getKeys(keys)
    var numKeys: Int = keys.count.intValue
    var key: String?
    var val: String?
    var i: Int = 0
    while i < numKeys {
        key = keys.string(at: i)
        val = ht.lookupStr(key)
        print("\(key!) = \(val!)")
        i = i + 1
    }

    // Output for the above loop:

    // color = blue
    // name = Jack Sparrow
    // fruits = apples&oranges
    // txt = this is a test
    // movie = Pirates of the Carribean

    // Get all name/value pairs as a query parm string with values URL encoded
    qp = ht.toQueryString()
    print("\(qp!)")

    // Result:
    // color=blue&name=Jack%20Sparrow&fruits=apples%26oranges&txt=this%20is%20a%20test&movie=Pirates%20of%20the%20Carribean

}