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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})
Python's is operator may be used to compare object identities (comparison by reference), and comparisons may be chained—for example, a <= b <= c. Python uses and, or, and not as Boolean operators. Python has a type of expression named a list comprehension, and a more general expression named a generator expression. [77] Anonymous functions ...
Operator as last object of line. Ruby (comment may follow operator) Operator as first character of continued line. AutoHotkey: Any expression operators except ++ and --, and a comma or a period [9] Backslash as first character of continued line. Vimscript; Some form of inline comment serves as line continuation. Turbo Assembler: \ m4: dnl; TeX ...
Cython provides optional manual memory management by letting the user import malloc, realloc, and free from C, which they can then use in Python code. [ 18 ] D provides programmers with full control over its own garbage collector, including the ability to disable it outright.
Augmented assignment (or compound assignment) is the name given to certain assignment operators in certain programming languages (especially those derived from C).An augmented assignment is generally used to replace a statement where an operator takes a variable as one of its arguments and then assigns the result back to the same variable.
var list := {0, 1} a, b := list The list will be unpacked so that 0 is assigned to a and 1 to b. Furthermore, a, b := b, a swaps the values of a and b. In languages without parallel assignment, this would have to be written to use a temporary variable var t := a a := b b := t since a := b; b := a leaves both a and b with the original value of b.
In C, the functions strcmp and memcmp perform a three-way comparison between strings and memory buffers, respectively. They return a negative number when the first argument is lexicographically smaller than the second, zero when the arguments are equal, and a positive number otherwise.
The standard type hierarchy of Python 3. In computer science and computer programming, a data type (or simply type) is a collection or grouping of data values, usually specified by a set of possible values, a set of allowed operations on these values, and/or a representation of these values as machine types. [1]