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Groups > comp.lang.java.programmer > #34379
| From | Eric Sosman <esosman@comcast-dot-net.invalid> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: how does one explain this syntax? |
| Date | 2016-05-23 07:32 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <nhuphs$7op$1@dont-email.me> (permalink) |
| References | <nhrhd5$7r6$1@reader1.panix.com> <nhsjoi$hd4$1@dont-email.me> <dqeiopFiq3jU1@mid.individual.net> <nhu3al$36t$1@dont-email.me> |
On 5/23/2016 1:13 AM, Knute Johnson wrote:
> On 5/22/2016 13:22, Robert Klemme wrote:
>> And why not do this instead?
>>
>> for (final Entry<Integer, String> entry : tmap.entrySet())
>> System.out.printf("key is: %d & value is: %s\n", entry.getKey(),
>> entry.getValue());
>>
>> Note: tmap.get(key) is usually less efficient than fetching the value
>> from an Entry.
>>
>> Kind regards
>>
>> robert
>
> I'll bite, why is it less efficient?
It doesn't need to re-search the map.
Admittedly, Map.Entry is an interface rather than a class, so
it's not a given that the getKey() and getValue() implementations
are one-liners. It seems highly likely, though -- and in the case
of TreeMap, both methods are in fact trivial.
--
esosman@comcast-dot-net.invalid
"Don't be afraid of work. Make work afraid of you." -- TLM
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how does one explain this syntax? ruben safir <ruben@mrbrklyn.com> - 2016-05-22 01:51 -0400
Re: how does one explain this syntax? Martin Gregorie <martin@address-in-sig.invalid> - 2016-05-22 10:05 +0000
Re: how does one explain this syntax? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-22 07:21 -0400
Re: how does one explain this syntax? Popping mad <rainbow@colition.gov> - 2016-05-22 20:21 +0000
Re: how does one explain this syntax? Lars Enderin <lars.enderin@telia.com> - 2016-05-22 22:32 +0200
Re: how does one explain this syntax? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-22 17:32 -0400
Re: how does one explain this syntax? Lew <lewbloch@gmail.com> - 2016-05-23 14:36 -0700
Re: how does one explain this syntax? Lew <lewbloch@gmail.com> - 2016-05-23 14:34 -0700
Re: how does one explain this syntax? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-05-22 08:41 -0700
Re: how does one explain this syntax? Robert Klemme <shortcutter@googlemail.com> - 2016-05-22 22:22 +0200
Re: how does one explain this syntax? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-05-22 22:13 -0700
Re: how does one explain this syntax? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-23 07:32 -0400
Re: how does one explain this syntax? Robert Klemme <shortcutter@googlemail.com> - 2016-05-23 04:57 -0700
Re: how does one explain this syntax? Popping mad <rainbow@colition.gov> - 2016-05-22 20:23 +0000
Re: how does one explain this syntax? Roedy Green <inquiry@mindprod.com> - 2016-05-30 21:51 -0700
Re: how does one explain this syntax? Roedy Green <inquiry@mindprod.com> - 2016-05-30 21:54 -0700
Re: how does one explain this syntax? Roedy Green <inquiry@mindprod.com> - 2016-05-30 22:00 -0700
Re: how does one explain this syntax? Roedy Green <inquiry@mindprod.com> - 2016-05-30 22:17 -0700
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