lookup Function
lookup retrieves the value of a single element from a map, given its key.
If the given key does not exist, the given default value is returned instead.
lookup(map, key, default)
Note
For historical reasons, the default parameter is actually optional. However,
omitting default is deprecated since v0.7 because that would then be
equivalent to the native index syntax, map[key].
Examples
> lookup({a="ay", b="bee"}, "a", "what?")
ay
> lookup({a="ay", b="bee"}, "c", "what?")
what?
Related Functions
elementretrieves a value from a list given its index.