# array

Constructs an immutable array from a pair of bounds and a list of initial associations. The bounds are specified as a pair of the lowest and highest bounds in the array respectively. For example, a one-origin vector of length 10 has bounds (1,10), and a one-origin 10 by 10 matrix has bounds ((1,1),(10,10)). An association is a pair of the form (i,x), which defines the value of the array at index i to be x. The array is undefined if any index in the list is out of bounds. If any two associations in the list have the same index, the value at that index is implementation-dependent. (In GHC, the last value specified for that index is used. Other implementations will also do this for unboxed arrays, but Haskell 98 requires that for Array the value at such indices is bottom.) Because the indices must be checked for these errors, array is strict in the bounds argument and in the indices of the association list. Whether array is strict or non-strict in the elements depends on the array type: Array is a non-strict array type, but all of the UArray arrays are strict. Thus in a non-strict array, recurrences such as the following are possible: > a = array (1,100) ((1,1) (:) [(i, i * a!(i-1)) | i \<- [2..100]]) Not every index within the bounds of the array need appear in the association list, but the values associated with indices that do not appear will be undefined. If, in any dimension, the lower bound is greater than the upper bound, then the array is legal, but empty. Indexing an empty array always gives an array-bounds error, but bounds still yields the bounds with which the array was constructed.
Construct an array with the specified bounds and containing values for given indices within these bounds. The array is undefined (i.e. bottom) if any index in the list is out of bounds. The Haskell 98 Report further specifies that if any two associations in the list have the same index, the value at that index is undefined (i.e. bottom). However in GHC's implementation, the value at such an index is the value part of the last association with that index in the list. Because the indices must be checked for these errors, array is strict in the bounds argument and in the indices of the association list, but non-strict in the values. Thus, recurrences such as the following are possible: > a = array (1,100) ((1,1) (:) [(i, i * a!(i-1)) | i <- [2..100]]) Not every index within the bounds of the array need appear in the association list, but the values associated with indices that do not appear will be undefined (i.e. bottom). If, in any dimension, the lower bound is greater than the upper bound, then the array is legal, but empty. Indexing an empty array always gives an array-bounds error, but bounds still yields the bounds with which the array was constructed.
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In addition to providing the Data.Array module <http:www.haskell.orgonlinereporthaskell2010/haskellch14.html as specified in the Haskell 2010 Language Report>, this package also defines the classes IArray of immutable arrays and MArray of arrays mutable within appropriate monads, as well as some instances of these classes. Version 0.5.0.0
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This is a package for working with arrayForth. This is a variant of Forth used by GreenArrays chips. This package contains an arrayForth simulator, two different representations of arrayForth programs and some utilities like parsing. It also supports synthesizing arrayForth programs using MCMC. The basic idea is to find arrayForth programs by taking a simple prior distribution of programs and using a randomized hill-climbing algorithm to find a program fulfilling certain tests. Version 0.2.0.6
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An collection of functions for working with multiple elements in mutable arrays. It is hoped some or all of these functions will be included in the array package for GHC 7.2. New in this version: Basically all names have been changed. A lot of redundant information has been removed as well. Version 0.3
Marshalling support: routines allocating, storing, and retrieving Haskell lists that are represented as arrays in the foreign language
Immutable array type.
The type of immutable non-strict (boxed) arrays with indices in i and elements in e.
Basic non-strict arrays. Note: The Data.Array.IArray module provides a more general interface to immutable arrays: it defines operations with the same names as those defined below, but with more general types, and also defines Array instances of the relevant classes. To use that more general interface, import Data.Array.IArray but not Data.Array.
Packed, unboxed, heap-resident arrays. Suitable for performance critical use, both in terms of large data quantities and high speed. This module is intended to be imported qualified, to avoid name clashes with Prelude functions, e.g. > import qualified Data.Text.Array as A The names in this module resemble those in the Array family of modules, but are shorter due to the assumption of qualifid naming.
Exceptions raised by array-related operations. (NOTE: GHC currently does not throw ArrayExceptions).
Exceptions generated by array operations
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This array library supports: unboxed references, Monad-independent references, syntax sugar for mutable types, a reimplemented Arrays library, changes in MArray usage, and using dynamic (resizable) arrays Version 0.1.3.1
Temporarily allocate space for the given number of elements (like Foreign.Marshal.Alloc.alloca, but for multiple elements).
Like allocaArray, but add an extra position to hold a special termination element.