Deletionsfrom

Deletionsfrom is a term used in information processing to describe an operation that removes elements from a sequence or collection beginning at a specified index and continuing according to a rule. The term is not tied to a single standard and appears across different programming libraries as a pattern for editing data structures. It can refer to in-place mutation or to functional styles that return a new sequence.

Operation and scope: Given a sequence, a starting index, and an optional count, deletionsfrom removes elements from the start position onward. If a count is provided, exactly that many elements are removed; if not, all elements from the start position to the end are removed. Some implementations support negative indexing or clamping at the ends. In immutable contexts, deletionsfrom returns a new sequence with the elements removed.

Algorithm and complexity: In typical array-like structures, deletionsfrom shifts subsequent elements to fill the gap, making the operation linear in the number of removed elements. Space complexity is usually constant for in-place variants and linear for functional (non-mutating) variants that create a new sequence.

Examples: A Python-like pseudocode appears as:

def deletionsFrom(seq, start, count=None):

if count is None:

del seq[start:]

else:

del seq[start:start+count]

return seq

Applications and variants: Used in data cleaning, log trimming, and user-interface updates—any scenario requiring removal of a contiguous block from a sequence. Variants may apply a predicate to delete elements within a range, producing a filtered result rather than a direct mutation.

See also: deletion, splice, slice, drop. History: The terminology is not universally standardized and appears in diverse API documents as a pattern for sequence editing rather than a formal data-structure operation.