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create a new array of references of length count and component type identified by the class reference index (indexbyte1 << 8 | indexbyte2) in the constant pool areturn b0 1011 0000 objectref → [empty] return a reference from a method arraylength be 1011 1110 arrayref → length get the length of an array astore 3a 0011 1010 1: index objectref →
Kotlin (/ ˈ k ɒ t l ɪ n /) [2] is a cross-platform, statically typed, general-purpose high-level programming language with type inference. Kotlin is designed to interoperate fully with Java , and the JVM version of Kotlin's standard library depends on the Java Class Library , but type inference allows its syntax to be more concise.
Folds can be regarded as consistently replacing the structural components of a data structure with functions and values. Lists, for example, are built up in many functional languages from two primitives: any list is either an empty list, commonly called nil ([]), or is constructed by prefixing an element in front of another list, creating what is called a cons node ( Cons(X1,Cons(X2,Cons ...
One of the most common examples of an algebraic data type is the singly linked list. A list type is a sum type with two variants, Nil for an empty list and Cons x xs for the combination of a new element x with a list xs to create a new list. Here is an example of how a singly linked list would be declared in Haskell:
Kotlin: semicolon separated (but sometimes implicitly inserted on newlines) Lua: whitespace separated (semicolon optional) Mathematica a.k.a. Wolfram semicolon separated MATLAB: newline terminated, separated by semicolon or comma (semicolon – result of receding statement hidden, comma – result displayed) MUMPS a.k.a. M
This allows the string to be any length with only the overhead of one byte; the alternative of storing a count requires either a string length limit of 255 or an overhead of more than one byte (there are other advantages and disadvantages described in the null-terminated string article).
in Kotlin, Unit is a singleton with only one value: the Unit object. In Ruby, nil is the only instance of the NilClass class. In C++, the std::monostate unit type was added in C++17. Before that, it is possible to define a custom unit type using an empty struct such as struct empty{}.
The type and length are fixed in size (typically 1–4 bytes), and the value field is of variable size. These fields are used as follows: Type A binary code, often simply alphanumeric, which indicates the kind of field that this part of the message represents; Length The size of the value field (typically in bytes); Value