大约有 18,400 项符合查询结果（耗时：0.0280秒） [XML]
Entity Framework select distinct name
...
The way that @alliswell showed is completely valid, and there's another way! :)
var result = EFContext.TestAddresses
.GroupBy(ta => ta.Name)
.Select(ta => ta.Key);
I hope it'll be useful to someone.
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Is gettimeofday() guaranteed to be of microsecond resolution?
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From the Linux FAQ for lock_gettime (see David Schlosnagle's answer) "CLOCK_MONOTONIC...is frequency adjusted by NTP via adjtimex(). In the future (I'm still trying to get the patch in) there will be a CLOCK_MONOTONIC_RAW that will not be modified at all, and will have...
Text size and different android screen sizes
...nd how there suggesting for using dimens.xml for different devices of android for Example see Below structure :
res/values/dimens.xml
res/values-small/dimens.xml
res/values-normal/dimens.xml
res/values-large/dimens.xml
res/values-xlarge/dimens.xml
for Example you have used below dimens.xml in...
For loop example in MySQL
...
drop table if exists foo;
create table foo
(
id int unsigned not null auto_increment primary key,
val smallint unsigned not null default 0
)
engine=innodb;
drop procedure if exists load_foo_test_data;
delimiter #
create procedure load_foo_test_data()
begin
declare v_...
How to insert spaces/tabs in text using HTML/CSS
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In cases wherein the width/height of the space is beyond   I usually use:
For horizontal spacer:
<span style="display:inline-block; width: YOURWIDTH;"></span>
For vertical spacer:
<span style="display:block; height: YO...
How to tell Maven to disregard SSL errors (and trusting all certs)?
...abled, a browser like check will be used.
-Dmaven.wagon.http.ssl.ignore.validity.dates=true - ignore issues with certificate dates.
Official documentation: http://maven.apache.org/wagon/wagon-providers/wagon-http/
Here's the oneliner for an easy copy-and-paste:
-Dmaven.wagon.http.ssl.insecure=tr...
Regex Named Groups in Java
...e active (with several outstanding bugs), and its GitHub fork could be considered instead.
jregex (See Brian Clozel's answer)
(Original answer: Jan 2009, with the next two links now broken)
You can not refer to named group, unless you code your own version of Regex...
That is precisely what Go...
How to query nested objects?
...
Answering my own comment, it's best to avoid using dots completely in your keys. In my solution I completely ditched the domains being keys, and created a slice/array instead.
– Rens Tillmann
Jun 11 at 19:16
...
Sorting dropdown alphabetically in AngularJS
...="f.name for f in friends | orderBy:'name'"></select>
See this fiddle for an example.
It's worth noting that if track by is being used it needs to appear after the orderBy filter, like this:
<select ng-model="selected" ng-options="f.name for f in friends | orderBy:'name' track by f.i...
Select where count of one field is greater than one
...t face value:
SELECT *
FROM db.table
HAVING COUNT(someField) > 1
Ideally, there should be a GROUP BY defined for proper valuation in the HAVING clause, but MySQL does allow hidden columns from the GROUP BY...
Is this in preparation for a unique constraint on someField? Looks like it shou...