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Results tagged with lookup
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user 40480
A lookup (table) is an array that replaces run-time computation with a simpler array indexing operation. The savings in terms of processing time can be significant, since retrieving a value from memory is often faster than undergoing an 'expensive' computation or input/output operation. Over time the definition has become less strict, any kind of searching with a key value can be considered a lookup.
4
votes
Lookup table with fixed array
Do not cast the result of malloc.
malloc returns void *, and in C it is valid to convert void * to any pointer. If you cast to suppress a warning about integer to pointer conversion, it means that a …
- 57.3k
4
votes
Accepted
Lookups in list in C
Lookup is usually implemented iteratively:
while (root) {
if (root->id == id) {
break;
}
root = (root->id < id)? …
- 57.3k