The expression problem is a challenging problem in programming languages that concerns the extensibility and modularity of statically typed data abstractions. The goal is to define a data abstraction that is extensible both in its representations and its behaviors, where one can add new representations and new behaviors to the data abstraction, without recompiling existing code, and while retaining static type safety (e.g., no casts). The statement of the problem exposes deficiencies in programming paradigms and programming languages, and as of 2023[update] is still considered unsolved,[citation needed] although there are many proposed solutions.[citation needed]
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The expressionproblem is a challenging problem in programming languages that concerns the extensibility and modularity of statically typed data abstractions...
A regular expression (shortened as regex or regexp), sometimes referred to as rational expression, is a sequence of characters that specifies a match...
The Scunthorpe problem is the unintentional blocking of online content by a spam filter or search engine because their text contains a string (or substring)...
up no problem in Wiktionary, the free dictionary. No Problem may refer to: No problem, an English-language expression The "No-Problem" Problem, in spoken...
The XY problem is a communication problem encountered in help desk, technical support, software engineering, or customer service situations where the question...
constant problem is the problem of deciding whether a given expression is equal to zero. This problem is also referred to as the identity problem or the...
No problem is an English expression, used as a response to thanks (among other functions). It is regarded by some as a less formal alternative to you're...
"Turtles all the way down" is an expression of the problem of infinite regress. The saying alludes to the mythological idea of a World Turtle that supports...
where a and b are both instances of Vec. A problem with this approach is that more complicated expressions such as Vec x = a + b + c are implemented inefficiently...
In computer science, a parsing expression grammar (PEG) is a type of analytic formal grammar, i.e. it describes a formal language in terms of a set of...
functions of ADTs can be extended for the fixed set of constructors. See expressionproblem. A datatype is defined with the keyword datatype, as in: datatype...
In the field of molecular biology, gene expression profiling is the measurement of the activity (the expression) of thousands of genes at once, to create...
In linguistics, a phatic expression (English: /ˈfætɪk/, FAT-ik) is a communication which primarily serves to establish or maintain social relationships...
this context, a formula is also known as an expression, and so formula calculators may be called expression calculators. Also in this context, calculation...
field. Generalized star height problem: can all regular languages be expressed using generalized regular expressions with limited nesting depths of Kleene...
The Monty Hall problem is a brain teaser, in the form of a probability puzzle, based nominally on the American television game show Let's Make a Deal...
programs of >30K lines (a 103 increase in size). ExpressionProblem Illustration of Small ExpressionProblem Extensible IDEs Multi-Dimensional Separation...
In probability theory, the birthday problem asks for the probability that, in a set of n randomly chosen people, at least two will share a birthday. The...
within a brief allotted time. This problem has produced the expression "think outside the box".[page needed] Such problems are typically solved via a sudden...
a problem. As shown above, the genes of gene expression programming have all the same size. However, these fixed length strings code for expression trees...
languages to use backtracking. The most severe type of problem happens with backtracking regular expression matches, where some patterns have a runtime that...
an update that fixed a problem that prevented macros from running on Windows Vista-based client computers. Microsoft Expression Web 3 was released in 2009...