Pick
 Usage
Notes
 Further Examples
This picks out the first and fourth elements of a list.
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This picks out the first, fourth, and fifth elements of a list.
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Here are two lists.
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This picks out elements from   for which the corresponding element of   matches  .
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Here is a  matrix.
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This picks out the prime numbers from  , preserving the nested structure.
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This does the same thing.
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This uses a sparse array to pick out elements from a big list.
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