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I missed these on the first pass because in the legacy function table they are, for some reason, added in a different place than the others.
834 B
834 B
layout, page_title, sidebar_current, description
| layout | page_title | sidebar_current | description |
|---|---|---|---|
| functions | lookup function | docs-funcs-collection-lookup | The lookup function retrieves an element value from a map given its key. |
lookup Function
lookup retrieves the value of a single element from a map, given its key.
If the given key does not exist, a the given default value is returned instead.
lookup(map, key, default)
-> 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.