map->contains

Tests whether a map contains a key.

Target member

Signature

1map->contains(key)

Tests whether a map contains a key.

map->contains is called with member syntax on a receiver value. map->contains is useful when moving through groups of values. Prefer collection operations that match the shape of the data rather than converting everything to strings.

Parameters

key: Required value. Supply key positionally unless the signature shows a keyword form.

Examples

Basic call

1map('name'='Ada')->contains('name')

The example shows the normal call shape. Adapt variable names, validation, and surrounding error handling to the context.