mixins/indexable_container

module IndexableContainer

A mixin for containers that have are indexable using [] and []=. The container must have a method each_pair that iterates through the elements using index/value (or key/value).

Public Methods

indexes(*keys)

Create a new array populated with values for the given keys.

keys	the list of keys to use to populate the array.

Returns: an array populated with values for the given keys.

index(value)

Find the key (or index) for a given value.

value	the value to search for

Returns: a key (or index) that matches the given value. If none is found, returns the default value (or if the container has no default value, returns nil). If there are multiple keys that match the value, then the result is indeterminate.

indices

indices is an alias for indexes.

each_index

Enumerate through all elements in a container, yielding the key (or index) for the each element.

Returns: the last value from the last call to yield.

Requires