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The copy and paste approach often leads to large methods (a bad code smell). Each instance creates a code duplicate, with all the problems discussed in prior sections, but with a much greater scope. Scores of duplications are common; hundreds are possible. Bug fixes, in particular, become very difficult and costly in such code. [6]
Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})
The official definition of "Pythonic" is: [2] An idea or piece of code which closely follows the most common idioms of the Python language, rather than implementing code using concepts common to other languages. For example, a common idiom in Python is to loop over all elements of an iterable using a for statement. Many other languages don’t ...
Many widely used languages, such as C++, Java, and Python, provide object-oriented features. Although in the past object-oriented programming was widely accepted, [ 53 ] more recently essays criticizing object-oriented programming and recommending the avoidance of these features (generally in favor of functional programming ) have been very ...
The earliest editors (designed for teleprinter terminals) provided keyboard commands to delineate a contiguous region of text, then delete or move it. Since moving a region of text requires first removing it from its initial location and then inserting it into its new location, various schemes had to be invented to allow for this multi-step process to be specified by the user.
In wikimarkup, unfortunately, sublists follow the same rules as sections of a page: the only possible part of the list item not in sublists is before the first sublist. In the case of an unnumbered first-level list in wikimarkup, this limitation can be somewhat worked around by splitting the list into multiple lists; indented text between the ...
The Navy Seal copypasta, also sometimes known as Gorilla Warfare due to a misspelling of "guerrilla warfare" in its contents, is an aggressive but humorous attack paragraph supposedly written by an extremely well-trained member of the United States Navy SEALs (hence its name) to an unidentified "kiddo", ostensibly whoever the copypasta is directed to.
It may be difficult to extend the language because addition of reserved words for new features might invalidate existing programs or, conversely, "overloading" of existing reserved words with new meanings can be confusing. Porting programs can be problematic because a word not reserved by one system or compiler might be reserved by another.