java.util.stream 'map' method, proposal of method name change
magazin9 at gmail.com
Sat Aug 12 02:36:18 UTC 2017
Hi. When using java.util.stream 'map' method my opinion is that
'replaceWith' as method name would better describe what method do.
'map' method is applied on input stream, returns output stream but
returned stream elements are return values from 'map' method Function
argument. We continue our work with output stream so mapping with
input stream have no meaning. Input stream is replaced with output
stream which elements are outputs of Function. After that point we can
forgot about input stream.
Example of usage:
now - stream.map(e -> e+2).. // read: map input stream with
output stream containing elements resulting from function (e -> e+2)
proposed - stream.replaceWith(e -> e+2).. // read: replace input
stream with output stream containing elements resulting from function
(e -> e+2)
With 'map' method number of elements is the same but we do not make
assumptions what passed Function will do (specialization) until the
moment we pass Function implementation as method argument..
I will appreciate any comments.
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