peek_within: Peek First Interval Within a Query Interval

In Immutables: Fast and Functional Data Structures

Peek First Interval Within a Query Interval

Description

Peek First Interval Within a Query Interval

Usage

peek_within(x, start, end, bounds = NULL)

Arguments

x	An interval_index.
start	Query interval start.
end	Query interval end.
bounds	Optional boundary override. One of "[)", "[]", "()", "(]".

Details

Returns the first match in canonical interval order. Use peek_all_within() to retrieve all matches as an interval_index slice.

Value

The payload value from the first match, or NULL on no match.

Examples

ix <- interval_index("a", "b", "c", start = c(1, 2, 4), end = c(6, 3, 5))
peek_within(ix, 1, 4)

Immutables documentation built on April 29, 2026, 1:06 a.m.