Radix.fetch

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Link to this function

fetch(tree, key, opts \\ [])

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Specs

fetch(tree(), key(), keyword()) :: {:ok, {key(), value()}} | :error

Fetches the key,value-pair for a specific key in the given tree.

Returns {:ok, {key, value}} or :error when key is not in the tree. By default an exact match is used, specify match: :lpm to fetch based on a longest prefix match.

Example

iex> t = new([{<<>>, 0}, {<<1>>, 1}, {<<1, 1>>, 2}])
iex> fetch(t, <<1, 1>>)
{:ok, {<<1, 1>>, 2}}
iex>
iex> fetch(t, <<2>>)
:error
iex> fetch(t, <<2>>, match: :lpm)
{:ok, {<<>>, 0}}