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In computer science, the term difference list refers to a data structure representing a list with an efficient O(1) concatenation operation and conversion to a linked list in time proportional to its length. Difference lists can be implemented using first-class functions or using unification.
Orthogonally, they are used to efficiently aggregate data in functional-style task-parallel algorithms, as an implementation of the conc-list data abstraction. [4] Conc-list is a parallel programming counterpart to functional cons-lists, and was originally introduced by the Fortress language.
Pandas is built around data structures called Series and DataFrames. Data for these collections can be imported from various file formats such as comma-separated values, JSON, Parquet, SQL database tables or queries, and Microsoft Excel. [8] A Series is a 1-dimensional data structure built on top of NumPy's array.
A singly-linked list structure, implementing a list with three integer elements. The term list is also used for several concrete data structures that can be used to implement abstract lists, especially linked lists and arrays. In some contexts, such as in Lisp programming, the term list may refer specifically to a linked list rather than an array.
This is a list of well-known data structures. For a wider list of terms, see list of terms relating to algorithms and data structures. For a comparison of running times for a subset of this list see comparison of data structures.
Folds can be regarded as consistently replacing the structural components of a data structure with functions and values. Lists, for example, are built up in many functional languages from two primitives: any list is either an empty list, commonly called nil ([]), or is constructed by prefixing an element in front of another list, creating what is called a cons node ( Cons(X1,Cons(X2,Cons ...
Comparison of list data structures Peek (index) Mutate (insert or delete) at … Excess space, average Beginning End Middle Linked list: Θ(n) Θ(1)
Dataframe may refer to: A tabular data structure common to many data processing libraries: pandas (software) § DataFrames;