Peek Minimum-Priority Element

Returns the element at the minimum priority without modifying the queue.

Usage

peek_min(x)

Arguments

x

A priority_queue.

Value

Element at minimum priority, or NULL when x is empty.

Details

Ties are stable: when multiple elements share minimum priority, this returns the earliest element in queue order.

Examples

x <- priority_queue("a", "b", "c", priorities = c(2, 1, 1))
peek_min(x)
#> [1] "b"
peek_min(priority_queue())
#> NULL