자유게시판 글답변

본문 바로가기

사이트 내 전체검색

자유게시판 글답변

이름필수
비밀번호필수
이메일
홈페이지
분류필수
제목필수
내용필수	웹에디터 시작 > > > <p> The choice of whether to use WITH-SLOTS versus WITH-ACCESSORS is the same as the choice between SLOT-VALUE and an accessor function: low-level code that provides the basic functionality of a class may use SLOT-VALUE or <a href="http://wwii-enlistment.com/news/scopri-il-mondo-di-casino-stranieri-una-guida-alle/">plaza royal casino</a> WITH-SLOTS to directly manipulate slots in ways not supported by accessor functions or to explicitly avoid the effects of <a href="https://www.news24.com/news24/search?query=auxiliary%20methods">auxiliary methods</a> that may have been defined on the accessor functions. WITH-SLOTS provides direct access to the slots, as if by SLOT-VALUE, while WITH-ACCESSORS provides a shorthand for accessor methods. The form of <a href="https://www.theepochtimes.com/n3/search/?q=WITH-ACCESSORS">WITH-ACCESSORS</a> is the same as WITH-SLOTS except each element of the slot list is a two-item list containing a variable name and the name of an accessor function. However, :class slots are accessed the same as :instance slots--they're accessed with SLOT-VALUE or an accessor function, which means you can access the slot value only through an instance of the class even though it isn't actually stored in the instance.</p><br/><br/><p> These machines can be found at various locations, including grocery stores, banks, and even some casinos. And if you decide you want to directly access the slot value in order to avoid running auxiliary methods, it gets even more cluttered. As I just discussed, you don't want callers to be able to directly set the balance, but for other slots, such as customer-name, you may also want to provide a function to set them. The name of a SETF function is a two-item list whose first element is the symbol setf and whose second element is a symbol, typically the name of a function used to access the place the SETF function will set. While using accessor functions will make your code easier to maintain, they can still be a bit verbose. There's nothing hard about writing these accessor functions, but it wouldn't be in keeping with The Lisp Way to have to write them all by hand.</p><img src="https://images.unsplash.com/photo-1697565633413-4dc561d570cf?ixid=M3wxMjA3fDB8MXxzZWFyY2h8MjB8fG1hcmluYSUyMGJheSUyMHNhbmRzJTIwY2FzaW5vfGVufDB8fHx8MTc1MzM2NDA3NHww\u0026ixlib=rb-4.1.0"><br/><br/><p> Thus, it's possible for all instances of one class to share a :class slot while instances of a subclass may each have their own :instance slot of the same name. On the other hand, passing an initarg to MAKE-INSTANCE will set the value, affecting all instances of the class. Python.11 Rather, class-allocated slots are used primarily to save space; if you're going to create many instances of a class and all instances are going to have a reference to the same object--say, a pool of shared resources--you can save the cost of each instance having its own reference by making the slot class-allocated. The :initform and :initarg options have essentially the same effect except the initform is evaluated once when the class is defined rather than each time an instance is created. A slot specifier that includes options such as :initarg or :initform is written as a list starting with the name of the slot followed by the options. Thus, DEFCLASS supports thre > > 웹 에디터 끝
자동등록방지	자동등록방지 자동등록방지 숫자를 순서대로 입력하세요.

취소

회사소개 개인정보취급방침 서비스이용약관 모바일 버전으로 보기 상단으로

대전광역시 유성구 계룡로 105 (구. 봉명동 551-10번지) 3, 4층 | 대표자 : 김형근, 김기형 | 사업자 등록증 : 314-25-71130
대표전화 : 1588.7655 | 팩스번호 : 042.826.0758
Copyright © CAMESEEING.COM All rights reserved.

접속자집계

오늘: 4,535
어제: 5,464
최대: 16,322
전체: 5,599,000

-->
Warning: Unknown: write failed: Disk quota exceeded (122) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/home2/hosting_users/cseeing/www/data/session) in Unknown on line 0