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Bit array information


A bit array (also known as bitmask,[1] bit map, bit set, bit string, or bit vector) is an array data structure that compactly stores bits. It can be used to implement a simple set data structure. A bit array is effective at exploiting bit-level parallelism in hardware to perform operations quickly. A typical bit array stores kw bits, where w is the number of bits in the unit of storage, such as a byte or word, and k is some nonnegative integer. If w does not divide the number of bits to be stored, some space is wasted due to internal fragmentation.

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Bit array

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A bit array (also known as bitmask, bit map, bit set, bit string, or bit vector) is an array data structure that compactly stores bits. It can be used...

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Bit

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is commonly called a bit string, a bit vector, or a single-dimensional (or multi-dimensional) bit array. A group of eight bits is called one byte, but...

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Bitwise operation

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operation operates on a bit string, a bit array or a binary numeral (considered as a bit string) at the level of its individual bits. It is a fast and simple...

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RAID

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the write performance. The array continues to operate as long as at least one drive is functioning. RAID 2 consists of bit-level striping with dedicated...

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Bit field

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some previous operation. A bit field is distinguished from a bit array in that the latter is used to store a large set of bits indexed by integers and is...

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Array

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above, such as: Bit array or bit vector Dynamic array, allocated at run time Jagged array, an array of arrays of which the member arrays can be of different...

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Bloom filter

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filter is a bit array of m bits, all set to 0. It is equipped with k different hash functions, which map set elements to one of the m possible array positions...

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Parity bit

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Parity bits are written at the rate of one parity bit per n bits, where n is the number of disks in the array. When a read error occurs, each bit in the...

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Bit Test

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Reset) resets it, and BTC (Bit Test and Complement) flips it. Logical Explanation BT BT SRC, POSITION SRC Represent as bits array POSITION Represent as numeric...

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List of data structures

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sequence. Array Bit array Bit field Bitboard Bitmap Circular buffer Control table Image Dope vector Dynamic array Gap buffer Hashed array tree Lookup...

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Shift register

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pool known as a "bit array". Data was stored into the array and read back out in parallel, often as a computer word, while each bit was stored serially...

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Binary search

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the range of keys. Bit arrays are very fast, requiring only O ( 1 ) {\textstyle O(1)} time. The Judy1 type of Judy array handles 64-bit keys efficiently...

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Counting sort

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may also be used to eliminate duplicate keys, by replacing the Count array with a bit vector that stores a one for a key that is present in the input and...

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Hash table

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computing, a hash table is a data structure that implements an associative array, also called a dictionary or simply map, which is an abstract data type...

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Computation of cyclic redundancy checks

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polynomials. function crc(bit array bitString[1..len], int len) { remainderPolynomial := polynomialForm(bitString[1..n]) // First n bits of the message // A...

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Hamming weight

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and std::has_single_bit, taking arguments of unsigned integer types. In Java, the growable bit-array data structure BitSet has a BitSet.cardinality() method...

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BMP file format

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bytes (a 32-bit DWORD) by padding. For images with height above 1, multiple padded rows are stored consecutively, forming a Pixel Array. The total number...

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C syntax

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multidimensional array should not be confused with an array of pointers to arrays (also known as an Iliffe vector or sometimes an array of arrays). The former...

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Manchester Baby

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Williams tube from one bit to 2,048, arranged in a 64 by 32-bit array, and demonstrated that it was able to store those bits for four hours. Engineer...

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Bit manipulation

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predication. Bit array Bit banding Bit banging Bit field Bit manipulation instruction set — bit manipulation extensions for the x86 instruction set. BIT predicate...

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Bitap algorithm

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Initialize the bit array R. */ R := new array[m+1] of bit, initially all 0 R[0] := 1 for i := 0; i < length(text); i += 1 do /* Update the bit array. */ for...

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Bzip2

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Huffman table selection. Delta encoding (Δ) of Huffman-code bit lengths. Sparse bit array showing which symbols are used. Any sequence of 4 to 255 consecutive...

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Java virtual machine

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capability to pack booleans into a bit array, so except for the type they perform and behave the same as byte arrays. In all other uses, the boolean type...

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Lookup table

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better performance.: 282-283  The bits array, bits_set with 256 entries is constructed by giving the number of one bits set in each possible byte value...

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