mlr3misc (version 0.1.6)

has_element: Check if an Object is Element of a List

Description

Simply checks if a list contains a given object.

• NB1: Objects are compared with identity.

• NB2: Only use this on lists with complex objects, for simpler structures there are faster operations.

• NB3: Clones of R6 objects are not detected.

Usage

has_element(.x, .y)

Arguments

.x

:: (list() or atomic vector).

.y

:: any Object to test for.

Examples

# NOT RUN {
has_element(list(1, 2, 3), 1)
# }