haskell - Indexing Data.Vector with an array of indices -

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is possible in haskell index vector data.vector using vector of integers b, i.e. a[b] = [ a[b[0]], a[b[1]], ... ]? seems planned further versions vector tutorial, section 2.11 suggests.

of course, 1 can write function this, involve lot of copying.

it advisable use backpermute map (xs!) more efficient.


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