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Check for trailing elements

Source: R/check_trailing.R
check_trailing.Rd

Check if the provided vector has a consistently trailing element. If a certain trailing value has been reached, all subsequent vector elements should be this value.

Usage

check_trailing(vec, trail_value)

Arguments

vec

The to-be-checked vector.

trail_value

The trailing value to check for.

Value

A single logical if the provided trailing is fulfilled.

Details

If the trailing value does not occur in the vector, returns TRUE.

Examples


# 3 is trailing
vec <- c(1, 2, 3, 3, 3)
check_trailing(vec, trail_value = 3)
#> [1] TRUE

# c is not trailing (interrupted by b)
vec <- c("b", "c", "b", "c", "c")
check_trailing(vec, trail_value = "c")
#> [1] FALSE

# trailing value does not occur - trailing rule is not violated
check_trailing(vec, trail_value = "d")
#> [1] TRUE

# also works with NA
check_trailing(c(1, NA, NA), trail_value = NA)
#> [1] TRUE