Sets: Difference between revisions
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[[file:arrows.png|right|frame|Programming basics<ref>http://www.flaticon.com/</ref>]] | [[file:arrows.png|right|frame|Programming basics<ref>http://www.flaticon.com/</ref>]] | ||
A set is an abstract data type that can store certain values, without any particular order, and no repeated values. It is a computer implementation of the mathematical concept of a finite set. Unlike most other collection types, rather than retrieving a specific element from a set, one typically tests a value for membership in a set.<ref>https://en.wikipedia.org/wiki/Set_(abstract_data_type)#Language_support</ref> | |||
== Example == | == Example == | ||
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== Standards == | == Standards == | ||
Latest revision as of 12:04, 20 June 2019
Programming basics[1]
A set is an abstract data type that can store certain values, without any particular order, and no repeated values. It is a computer implementation of the mathematical concept of a finite set. Unlike most other collection types, rather than retrieving a specific element from a set, one typically tests a value for membership in a set.[2]
Example[edit]
These examples are used from https://docs.python.org/3.6/tutorial/datastructures.html#sets[3] with gratitude.
a = set('abracadabra')
b = set('alacazam')
a # unique letters in a
{'a', 'r', 'b', 'c', 'd'}
a - b # letters in a but not in b
{'r', 'd', 'b'}
a | b # letters in a or b or both
{'a', 'c', 'r', 'd', 'b', 'm', 'z', 'l'}
a & b # letters in both a and b
{'a', 'c'}
a ^ b # letters in a or b but not both
{'r', 'd', 'b', 'm', 'z', 'l'}
Standards[edit]
- Construct algorithms using pre- defined sub-programmes, one- dimensional arrays and/or collections.