S-expressions S-expressions The basic elements of s-expressions are lists and atoms. Lists are delimited by parentheses and can contain any number of whitespace-separated eleme...
Macro Expansion Time vs. Runtime(宏展开期和运行期) Macro Expansion Time vs. Runtime(宏展开期和运行期) The key to understanding macros is to be quite clear about the distinction between the cod...
String Types String Types The other kinds of primitive types that are ubiquitous in the ID3 format are strings. In the previous chapter I discussed some of the issues you have ...
WHEN and UNLESS (WHEN 和 UNLESS ) WHEN and UNLESS (WHEN 和 UNLESS ) As you’ve already seen, the most basic form of conditional execution—if x , do y ; otherwise do z --is pro...
Filenames(文件名) Filenames(文件名) So far you’ve used strings to represent filenames. However, using strings as filenames ties your code to a particular operating system and file sy...
“There Is No List”(“没有列表”) “There Is No List”(“没有列表”) Spoon Boy: Do not try and bend the list. That’s impossible. Instead… only try to realize the truth. 勺子男孩:不要试图弯曲列表。那是不可能的...