By Letter: Non-alphabet | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
  Email this page to a friend


Array




1. <programming> A collection of identically typed data items distinguished by their indices (or "subscripts").

The number of dimensions an array can have depends on the language but is usually unlimited.

An array is a kind of aggregate data type.

A single ordinary variable (a "scalar") could be considered as a zero-dimensional array.

A one-dimensional array is also known as a "vector".

A reference to an array element is written something like A[i,j,k] where A is the array name and i, j and k are the indices.

The C language is peculiar in that each index is written in separate brackets, e.g. A[i][j][k].

This expresses the fact that, in C, an N-dimensional array is actually a vector, each of whose elements is an N-1 dimensional array.

Elements of an array are usually stored contiguously. Languages differ as to whether the leftmost or rightmost index varies most rapidly, i.e. whether each row is stored contiguously or each column (for a 2D array).

Arrays are appropriate for storing data which must be accessed in an unpredictable order, in contrast to lists which are best when accessed sequentially.

See also associative array.

2. <architecture> A processor array, not to be confused with an array processor.



< Previous Terms Terms Containing array Next Terms >
armour-plated
ARP
ARPA
ARPANET
ARQ
Actus
Adaptor
addressing mode
aggregate type
AIDA
array processor
Array Processor Assembly Language
Array Theory
arrow key
ART


Web Standards & Support:

Link to and support eLook.org Powered by LoadedWeb Web Hosting
Valid XHTML 1.0!Valid CSS!eLook.org FireFox Extensions