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| From | Sebastian <news@seyweiler.dyndns.org> |
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) |
| Date | Wed, 12 Jun 2013 10:32:26 +0200 |
| Organization | albasani.net |
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Am 12.06.2013 01:17, schrieb Stefan Ram:
> Sebastian<news@seyweiler.dyndns.org> writes:
>> would be Maurice Naftalin's Lambda FAQ at http://www.lambdafaq.org/
>
> This says:
>
> »Capture of local variables is restricted to those that
> are effectively final. Lifting this restriction would
> present implementation difficulties«.
>
> Here's another story:
>
> »Guy Steele wrote:
>
> Actually, the prototype implementation *did* allow
> non-final variables to be referenced from within
> inner classes. There was an outcry from *users*,
> complaining that they did not want this!«
>
> http://madbean.com/2003/mb2003-49/
>
Brian Goetz gives concurrency issues as the reason in his "official"
State of the lambda, section 7:
"It is our intent to prohibit capture of mutable local variables. The
reason is that idioms like this:
int sum = 0;
list.forEach(e -> { sum += e.size(); });
are fundamentally serial; it is quite difficult to write lambda bodies
like this that do not have race conditions. Unless we are willing to
enforce—preferably at compile time—that such a function cannot escape
its capturing thread, this feature may well cause more trouble than it
solves."
http://cr.openjdk.java.net/~briangoetz/lambda/lambda-state-4.html
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Java 8 Streams and Eratosthenes Sebastian <news@seyweiler.dyndns.org> - 2013-06-04 23:54 +0200
Re: Java 8 Streams and Eratosthenes Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-06-04 19:35 -0300
Re: Java 8 Streams and Eratosthenes Sebastian <news@seyweiler.dyndns.org> - 2013-06-05 09:03 +0200
Re: Java 8 Streams and Eratosthenes Sebastian <news@seyweiler.dyndns.org> - 2013-06-05 09:44 +0200
Re: Java 8 Streams and Eratosthenes Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-06-05 17:43 -0300
Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Sebastian <news@seyweiler.dyndns.org> - 2013-06-10 01:27 +0200
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-06-09 22:28 -0300
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Sebastian <news@seyweiler.dyndns.org> - 2013-06-10 19:43 +0200
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) markspace <markspace@nospam.nospam> - 2013-06-10 13:18 -0700
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Sebastian <news@seyweiler.dyndns.org> - 2013-06-11 23:27 +0200
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Sebastian <news@seyweiler.dyndns.org> - 2013-06-12 10:32 +0200
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Sebastian <news@seyweiler.dyndns.org> - 2013-06-12 14:37 +0200
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) markspace <markspace@nospam.nospam> - 2013-06-12 12:05 -0700
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Sebastian <news@seyweiler.dyndns.org> - 2013-06-12 22:53 +0200
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) markspace <markspace@nospam.nospam> - 2013-06-15 15:18 -0700
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Sebastian <news@seyweiler.dyndns.org> - 2013-06-16 22:52 +0200
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-06-16 21:56 -0300
Re: Lazy primes with Java 8 (was Re: Java 8 Streams and Eratosthenes) Sebastian <news@seyweiler.dyndns.org> - 2013-06-18 23:18 +0200
Re: Java 8 Streams and Eratosthenes markspace <markspace@nospam.nospam> - 2013-06-04 17:24 -0700
Re: Java 8 Streams and Eratosthenes Sebastian <news@seyweiler.dyndns.org> - 2013-06-05 09:09 +0200
Re: Java 8 Streams and Eratosthenes markspace <markspace@nospam.nospam> - 2013-06-05 09:45 -0700
Re: Java 8 Streams and Eratosthenes Sebastian <news@seyweiler.dyndns.org> - 2013-06-05 21:32 +0200
Re: Java 8 Streams and Eratosthenes Sebastian <news@seyweiler.dyndns.org> - 2013-06-05 09:47 +0200
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