GROOVY-5403 Add grep to Iterator, to return a new filtered Iterator #40

timyates · 2012-04-10T15:51:12Z

https://jira.codehaus.org/browse/GROOVY-5403

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()

blackdrag · 2013-01-04T14:15:49Z

See comment on https://jira.codehaus.org/browse/GROOVY-5403

Tim Yates added 2 commits April 10, 2012 16:45

Added grep functionality to Iterator

cb346c2

Added test from the Jira request

75f8348

blackdrag closed this Jan 4, 2013

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GROOVY-5403 Add grep to Iterator, to return a new filtered Iterator #40

GROOVY-5403 Add grep to Iterator, to return a new filtered Iterator #40

timyates commented Apr 10, 2012

blackdrag commented Jan 4, 2013

GROOVY-5403 Add grep to Iterator, to return a new filtered Iterator #40

GROOVY-5403 Add grep to Iterator, to return a new filtered Iterator #40

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timyates commented Apr 10, 2012

blackdrag commented Jan 4, 2013