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function crc(bit array bitString[1..len], int len) { remainderPolynomial := polynomialForm(bitString[1..n]) // First n bits of the message // A popular variant complements remainderPolynomial here; see § Preset to −1 below for i from 1 to len { remainderPolynomial := remainderPolynomial * x + bitString[i+n] * x 0 // Define bitString[k]=0 for ...
In computer science, a lookup table (LUT) is an array that replaces runtime computation with a simpler array indexing operation, in a process termed as direct addressing.The savings in processing time can be significant, because retrieving a value from memory is often faster than carrying out an "expensive" computation or input/output operation. [1]
Gal's accurate tables is a method devised by Shmuel Gal to provide accurate values of special functions using a lookup table and interpolation. It is a fast and efficient method for generating values of functions like the exponential or the trigonometric functions to within last-bit accuracy for almost all argument values without using extended ...
A hash table uses a hash function to compute an index, also called a hash code, into an array of buckets or slots, from which the desired value can be found. During lookup, the key is hashed and the resulting hash indicates where the corresponding value is stored. A map implemented by a hash table is called a hash map.
In computer programming, a virtual method table (VMT), virtual function table, virtual call table, dispatch table, vtable, or vftable is a mechanism used in a programming language to support dynamic dispatch (or run-time method binding).
The Rijndael S-box is a substitution box (lookup table) used in the Rijndael cipher, ... c is 01100011 2, and subscripts indicate a reference to the indexed bit. [3]
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The following pseudocode is an implementation of an open addressing hash table with linear probing and single-slot stepping, a common approach that is effective if the hash function is good. Each of the lookup, set and remove functions use a common internal function find_slot to locate the array slot that either does or should contain a given key.