wren/test/core/list/map.wren

var a = [1, 2, 3]
var b = a.map {|x| x + 1 }.list
IO.print(b) // expect: [2, 3, 4]
Cleanups for merging map method 2014-02-15 00:34:30 -06:00			`var a = [1, 2, 3]`
Use deferred execution for Sequence.map and Sequence.where The methods Sequence.map and Sequence.where are now implemented using deferred execution. They return an instance of a new Sequence-derived class that performs the operation while iterating. This has three main advantages: * It can be computationally cheaper when not the whole sequence is iterated. * It consumes less memory since it does not store the result in a newly allocated list. * They can work on infinite sequences. Some disadvantages are: * Iterating the returned iterator will be slightly slower due to the added indirection. * You should be aware that modifications made to the original sequence will affect the returned sequence. * If you need the result in a list, you now need to call Sequence.list on the result. 2015-03-28 22:51:50 +01:00			`var b = a.map {\|x\| x + 1 }.list`
Cleanups for merging map method 2014-02-15 00:34:30 -06:00			`IO.print(b) // expect: [2, 3, 4]`