底层操作 pointerof sizeof instance_sizeof 声明一个未初始化的变量 底层操作 crystal提供了一些底层的操作，用于C绑定。 pointerof 返回一个指向变量或对象变量的指针。 a = 1 ptr = pointerof ( a ) ptr . value = 2 ...

Documenting code Association Format Markup Linking Parameters Code Examples unicorn = Unicorn.new unicorn.horns # => 1 ``` Admonitions Directives ditto nodoc inherit...

Connection pool Configuration Sample Connection pool When a connection is established it usually means opening a TCP connection or Socket. The socket will handle one statement...

Connection pool Configuration Sample Connection pool When a connection is established it usually means opening a TCP connection or Socket. The socket will handle one statement...

Guides Guides Read these guides to get the best out of Crystal.

Guides Guides Read these guides to get the best out of Crystal.

Tutorials Tutorials This is the starting point to learn the basics of Crystal.

Control Flow Primitive Types Nil Bool Boolean Algebra Truthiness Control Flow Conditionals Else More branches Loops Infinite loops Skipping and Breaking Control Flow...

Control Flow Primitive Types Nil Bool Boolean Algebra Truthiness Control Flow Conditionals Else More branches Loops Infinite loops Skipping and Breaking Control Flow...

Methods Arguments Default arguments Type Restrictions Overloading Methods To avoid duplication of the same message, instead of using a variable we can define a method and ca...