pattern matcher - meaning and definition. What is pattern matcher
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What (who) is pattern matcher - definition

SOFTWARE DESIGN PATTERN
Facade Pattern; Design Pattern - Facade; Façade pattern

Gestalt Pattern Matching         
STRING-MATCHING ALGORITHMS FOR DETERMINING THE SIMILARITY OF TWO STRINGS
Ratcliff/Obershelp Pattern Recognition; Ratcliff/Obershelp; R/O; Gestalt Pattern Matching
Gestalt Pattern Matching, also Ratcliff/Obershelp Pattern Recognition, is a string-matching algorithm for determining the similarity of two strings. It was developed in 1983 by John W.
Pattern matching         
ACT OF CHECKING A GIVEN SEQUENCE OF TOKENS FOR THE PRESENCE OF THE CONSTITUENTS OF SOME PATTERN
Pattern-matching; Pattern match; Pattern matches; Pattern Matching; Pattern matching (functional programming); Structural pattern matching
In computer science, pattern matching is the act of checking a given sequence of tokens for the presence of the constituents of some pattern. In contrast to pattern recognition, the match usually has to be exact: "either it will or will not be a match.
pattern matching         
ACT OF CHECKING A GIVEN SEQUENCE OF TOKENS FOR THE PRESENCE OF THE CONSTITUENTS OF SOME PATTERN
Pattern-matching; Pattern match; Pattern matches; Pattern Matching; Pattern matching (functional programming); Structural pattern matching
1. A function is defined to take arguments of a particular type, form or value. When applying the function to its actual arguments it is necessary to match the type, form or value of the actual arguments against the formal arguments in some definition. For example, the function length [] = 0 length (x:xs) = 1 + length xs uses pattern matching in its argument to distinguish a null list from a non-null one. There are well known algorithm for translating pattern matching into conditional expressions such as "if" or "case". E.g. the above function could be transformed to length l = case l of [] -> 0 x:xs -> 1 : length xs Pattern matching is usually performed in textual order though there are languages which match more specific patterns before less specific ones. 2. Descriptive of a type of language or utility such as awk or Perl which is suited to searching for strings or patterns in input data, usually using some kind of {regular expression}. (1994-11-28)

Wikipedia

Facade pattern

The facade pattern (also spelled façade) is a software-design pattern commonly used in object-oriented programming. Analogous to a facade in architecture, a facade is an object that serves as a front-facing interface masking more complex underlying or structural code. A facade can:

  • improve the readability and usability of a software library by masking interaction with more complex components behind a single (and often simplified) API
  • provide a context-specific interface to more generic functionality (complete with context-specific input validation)
  • serve as a launching point for a broader refactor of monolithic or tightly-coupled systems in favor of more loosely-coupled code

Developers often use the facade design pattern when a system is very complex or difficult to understand because the system has many interdependent classes or because its source code is unavailable. This pattern hides the complexities of the larger system and provides a simpler interface to the client. It typically involves a single wrapper class that contains a set of members required by the client. These members access the system on behalf of the facade client and hide the implementation details.