augustoasilva opened a new pull request #11551:
URL: https://github.com/apache/arrow/pull/11551
**MASK_FIRST_N**
Returns a masked version of str with the first n values masked. Upper case
letters are converted to "X", lower case letters are converted to "x" and
numbers are converted to "n". For example, mask_first_n("1234-5678-8765-4321",
4) results in nnnn-5678-8765-4321.
**MASK_LAST_N**
Returns a masked version of str with the last n values masked. Upper case
letters are converted to "X", lower case letters are converted to "x" and
numbers are converted to "n". For example, mask_last_n("1234-5678-8765-4321",
4) results in 1234-5678-8765-nnnn.
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