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You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses ...
A snippet of Python code with keywords highlighted in bold yellow font. The syntax of the Python programming language is the set of rules that defines how a Python program will be written and interpreted (by both the runtime system and by human readers). The Python language has many similarities to Perl, C, and Java. However, there are some ...
The Zen of Python is a collection of 19 "guiding principles" for writing computer programs that influence the design of the Python programming language. [1] Python code that aligns with these principles is often referred to as "Pythonic". [2] Software engineer Tim Peters wrote this set of principles and posted it on the Python mailing list in ...
SCPI-1999, Volume 1-4, 819 page PDF file, free download (doesn't include asterisk (*) commands, because they are specified in IEEE 488.2 & IEC 60488-2) IEEE 488.2-1992 , 254 page PDF file, costs USD$52 in 2024 (superseded by IEEE/IEC 60488-2-2004)
An extended context-free grammar (or regular right part grammar) is one in which the right-hand side of the production rules is allowed to be a regular expression over the grammar's terminals and nonterminals. Extended context-free grammars describe exactly the context-free languages.
In computer science, extended Backus–Naur form (EBNF) is a family of metasyntax notations, any of which can be used to express a context-free grammar.EBNF is used to make a formal description of a formal language such as a computer programming language.
He also introduced a clear distinction between generative rules (those of context-free grammars) and transformation rules (1956). [6] [7] John Backus, a programming language designer at IBM, proposed a metalanguage of "metalinguistic formulas" [2] [9] [10] to describe the syntax of the new programming language IAL, known today as ALGOL 58 (1959 ...
The practice dates back further to mathematical notation where indices for sums and multiplications are often i, j, etc. A variant convention is the use of duplicated letters for the index, ii , jj , and kk , as this allows easier searching and search-replacing than using a single letter.