René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Apply dict to map values","articleBody":"This is probably a crazy idea (and I don't currently have a use case), but could we make it easy to apply a dict to map values?  For example, to make the following easier and more reliable (i.e., not rely on inlining the dict):\r\n```python\r\nIn [10]: v = gb.Vector.from_values(np.arange(5), np.arange(5))\r\n\r\nIn [11]: v\r\nOut[11]:\r\n\"v_2\"      nvals  size  dtype  format\r\ngb.Vector      5     5  INT64    full\r\n-------------------------------------\r\nindex  0  1  2  3  4\r\nvalue  0  1  2  3  4\r\n\r\nIn [12]: v.apply(lambda x: {0: 0, 1: 2, 2: 4, 3: 6, 4: 8}[x]).new()\r\nOut[12]:\r\n\"v_4\"      nvals  size  dtype  format\r\ngb.Vector      5     5  INT64    full\r\n-------------------------------------\r\nindex  0  1  2  3  4\r\nvalue  0  2  4  6  8\r\n```\r\nThis requires Numba to know the types of the dictionary.  Also, I don't know how easy it would be to have a default value.  This may require its own method.\r\n\r\nThis is inspired by the Pandas functionality to be able to use `x.map(d)` to apply a dict or Series mapping.","author":{"url":"https://github.com/eriknw","@type":"Person","name":"eriknw"},"datePublished":"2022-05-23T17:34:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/246/python-graphblas/issues/246"}