From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aibo.runbox.com (aibo.runbox.com [91.220.196.211]) by sourceware.org (Postfix) with ESMTPS id 856113851C09 for ; Fri, 3 Jul 2020 22:33:10 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 856113851C09 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=bothner.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=per@bothner.com Received: from [10.9.9.73] (helo=submission02.runbox) by mailtransmit02.runbox with esmtp (Exim 4.86_2) (envelope-from ) id 1jrUF2-0003T5-Qg for kawa@sourceware.org; Sat, 04 Jul 2020 00:33:08 +0200 Received: by submission02.runbox with esmtpsa [Authenticated alias (524175)] (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) id 1jrUEy-0002PB-Og for kawa@sourceware.org; Sat, 04 Jul 2020 00:33:05 +0200 Subject: Re: Working with string keys in a java.util.Map To: kawa@sourceware.org References: <31504.1593813177@localhost> From: Per Bothner Message-ID: <68f1a45a-173d-aa66-298e-599c37cd93dc@bothner.com> Date: Fri, 3 Jul 2020 15:33:01 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <31504.1593813177@localhost> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: kawa@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Kawa mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Jul 2020 22:33:12 -0000 On 7/3/20 2:52 PM, Sudarshan S Chawathe wrote: > I've had to get Java "String"s from Kawa strings often for similar > reasons when using other JVM libraries, etc., and I have just used > '(String "kawa string)'; it seems to work well, although it does > introduce clutter. I don't see how to avoid that in general. One could write a wrapper Map that uses a coercion function to convert the key to required type, similar to the coercion function in the make-parameter function. Another way is to call the toString method, since Kawa strings implement java.lang.CharSequence: ("kstring":toString) This is cheap if the Kawa string is an IString, since uses a java.lang.String. Alternative syntax: (->java.lang.String "kstring") or shorter: (->String "kstring") -- --Per Bothner per@bothner.com http://per.bothner.com/