groovy

Add grep to Iterator, to return a new filtered Iterator

Details

  • Type: Improvement Improvement
  • Status: Closed Closed
  • Priority: Major Major
  • Resolution: Won't Fix
  • Affects Version/s: None
  • Fix Version/s: None
  • Component/s: None
  • Labels:
    None
  • Number of attachments :
    0

Description

grep currently works on collections, but it would be nice to have it work on Iterators

We could then do lazy things like:

// Set our initial value
def a = 1
// Define an iterator around this value
def iter = [ hasNext:{ true }, next:{ a++ } ] as Iterator

// Define a new iterator that will just emit odd numbers
def oddIter = iter.grep { it % 2 }

// Check it's working
assert [ 1, 3, 5 ] == oddIter.take( 3 ).collect()

Activity

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blackdrag blackdrag made changes -
Field Original Value New Value
Status Open [ 1 ] Resolved [ 5 ]
Assignee blackdrag blackdrag [ blackdrag ]
Resolution Won't Fix [ 2 ]
Paul King made changes -
Status Resolved [ 5 ] Closed [ 6 ]

People

  • Assignee:
    blackdrag blackdrag
    Reporter:
    Tim Yates
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Dates

  • Created:
    Updated:
    Resolved: