在Common Lisp 裡,狀況 (condition)包括了錯誤以及其它可能在執行期發生的情況。當一個狀況被捕捉時 (signalled),相應的處理程式 (handler)會被呼叫。處理錯誤狀況的預設處理程式通常會呼叫一個中斷迴圈 (break-loop)。但 Common Lisp 提供了多樣的運算子來捕捉及處理錯誤。要覆寫預設的處理程式,甚至是自己寫一個...
1. Common lisp is dynamically typed. Type errors are detected dynamically. We don't need to declare the type of object. 2. Each time a function is called, lisp creates new bindings to hold the arguments passed by the function's caller. A binding is the runtime manisfestation of a vari...
CLM - Common Lisp Music is a music synthesis and signal processing package in the Music V family. It provides much the same functionality as Stk, Csound, SuperCollider, PD, CMix, cmusic, and Arctic — a collection of functions that create and manipulate sounds, aimed primarily at composers ...
They're executed in the order specified on the command line, after the init file (if there is one) is loaded and before the toplevel read-eval-print loop is entered. Finally, any arguments following the pseudo-argument -- are not processed, and are made available to Lisp as the value ...
CLM - Common Lisp Music is a music synthesis and signal processing package in the Music V family. It provides much the same functionality as Stk, Csound, SuperCollider, PD, CMix, cmusic, and Arctic — a collection of functions that create and manipulate sounds, aimed primarily at composers ...
打开文件后,只需使用(print *db* out) 要将内容print到数据库。与FORMAT不同的是PRINT 输出的Lisp对象可以被Lisp reader读取为Lisp对象。宏WITH-STANDARD-IO-SYNTAX确保某些变量的值,这使得PRINT的行为表现为标准的状态。在将数据读取回来时为保证Lisp reader和printer的操作的兼容将需要使用相同的宏。save-db的参数...
In Common Lisp we will use CFFI to allocate the structure for the corresponding Allegro 5 functions. Remember to free up the memory afterwards! (defparameter*running-p*t) (let((event (cffi:foreign-alloc'(:unional:event))) (loopwhile*running-p*do(process-event event)) (cffi:foreign-free...
I've gotten a bunch of emails asking for advice on how to learn Common Lisp in the present day. I decided to write down all the advice I've been giving through email and social media posts in the hopes that someone might find it useful.One...
Also, older BIND servers reportedly will get caught in an infinite query loop trying to figure out the address for the aliased nameserver, causing a continuous stream of DNS requests to be sent. 2.5 MX records It is a good idea to give every host an MX record, even if it points to ...
CL-USER 85 > (loop for column in '([*] [ScientificName]) collect (select [count column] :from [SpeciesList] :flatp t)) ((205) (152)) CL-USER 86 > Notein the last of this set of examples how pure lisp and SQL components have been mixed: the variablecolumnis bound to an SQL...