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On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating system for DEC PDP-10 computers overflowed, in a bug known as "DATE75". The field value was calculated by taking the number of years since 1964, multiplying by 12, adding the number of months since January, multiplying by 31, and adding the number of days since the start of the month; putting 2 12 − 1 ...
The ::= rule defines a new algebraic data type, a data type with only data constructors.; The <~ rule defines an interface type - it indicates what properties are characteristic of a person and also gives type constraints on these properties.
The definition of an interface type lists required methods by name and type. Any object of type T for which functions exist matching all the required methods of interface type I is an object of type I as well. The definition of type T need not (and cannot) identify type I. For example, if Shape, Square and Circle are defined as
An object's virtual method table will contain the addresses of the object's dynamically bound methods. Method calls are performed by fetching the method's address from the object's virtual method table. The virtual method table is the same for all objects belonging to the same class, and is therefore typically shared between them.
Objective-C (a superset of C adding a Smalltalk derived object model and message passing syntax) OCaml; OpenEdge Advanced Business Language (ABL) Oz, Mozart Programming System; Perl 5; PHP; Pike; Prograph; Python (interpretive language, optionally object-oriented) Revolution (programmer does not get to pick the objects) Ring; Ruby; Scala; Speakeasy
It is a binary form for representing simple or complex data structures including associative arrays (also known as name-value pairs), integer indexed arrays, and a suite of fundamental scalar types. BSON originated in 2009 at MongoDB. Several scalar data types are of specific interest to MongoDB and the format is used both as a data storage and ...
De facto standard via Python Enhancement Proposals (PEPs) R: Application, statistics Yes Yes Yes Yes No Yes No Racket: Education, general, scripting Yes Yes Yes Yes No Yes Modular, logic, meta No Raku: Scripting, text processing, glue Yes Yes Yes Yes Yes Yes Aspect-oriented, array, lazy evaluation, multiple dispatch, metaprogramming No REALbasic
ECMAScript, JavaScript, ActionScript, OCaml, Java, C++, PHP, C#, Python, Lua, NekoVM Haxe is a high-level cross-platform programming language and compiler that can produce applications and source code for many different computing platforms from one code-base.