Count Elements Matching One Key

Count Elements Matching One Key

Usage

count_key(x, key)

Arguments

x

An ordered_sequence.

key

Query key.

Value

Integer count of matches.

Details

Counts multiplicity for a single key. Returns 0L when the key is not present.

Examples

x <- ordered_sequence("a", "b", "c", keys = c(1, 2, 2))
count_key(x, 2)
#> [1] 2
count_key(x, 10)
#> [1] 0