easier work with collections: default Stream.toList?
Sebastian.Millies at softwareag.com
Mon Sep 30 14:36:21 PDT 2013
yes, I do agree that's not too friendly, I just don't think that
list = list.stream().map( ... ).toList() is so significantly less intimidating.
> -----Original Message-----
> From: paulo.silveira at gmail.com [mailto:paulo.silveira at gmail.com] On Behalf Of
> Paulo Silveira
> Sent: Monday, September 30, 2013 9:59 PM
> To: Millies, Sebastian
> Cc: lambda-dev at openjdk.java.net
> Subject: Re: easier work with collections: default Stream.toList?
> Brian has already exposed the problems about including Stream.toList
> and other methods, just as Paul Sandoz.
> I do understand the points, but we are always forgetting the
> newcomers: Java 8 will be a difficult language to master, and much
> more difficult to learn the basics. list = list.stream().map( ...
> ).collect(Collectors.toList()) is not a friendly line of code to
> someone who is learning Java.
> Paulo Silveira
> 2013/9/30 Millies, Sebastian <Sebastian.Millies at softwareag.com>:
> > I would count myself a medium experienced user (I've been practicing using the
> new constructs in Java 8
> > from time to time for about half a year). I must say I'd value the purity of the
> stream interface much higher.
> > I think it's important to look beyond the current release to what may happen farther
> away in the future.
> > Tying streams to that horrible old API seems like a really bad idea to me. And what
> with IDE support and
> > static imports, I can't say there'd be much of a conciseness advantage that would
> pay for the pollution.
> > -- Sebastian
> > -----Original Message-----
> > From: lambda-dev-bounces at openjdk.java.net [mailto:lambda-dev-
> bounces at openjdk.java.net] On Behalf Of Paul Sandoz
> > Sent: Monday, September 30, 2013 10:26 AM
> > Cc: lambda-dev at openjdk.java.net
> > Subject: Re: easier work with collections: default Stream.toList?
> > [snip]
> > The main reasons for resisting Stream.toList etc are:
> > 1) It ties streams to the existing collections API; and
> > 2) If we add a few then people may likely want more.
> > i.e. pollution and not enough pollution respectively :-)
> > I like the purity of streams.
> > However, I find the arguments are persuasive for adding a few, say for List<T> and
> Map<K, List<T>> for common cases of toList and groupingBy. New users need not run
> into Collector immediately and for more experienced users it's just more concise.
> > Paul.
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