大约有 40,000 项符合查询结果（耗时：0.0392秒） [XML]
How do you find the current user in a Windows environment?
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The extra information with all the environment variables makes this a wonderful extended answer.
– bballdave025
May 21 at 19:32
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Can I get JSON to load into an OrderedDict?
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I am perplexed. The docs say the object_pairs_hook gets called for each literal that gets decoded into pairs. Why doesn't this create a new OrderedDict for each record in the JSON?
– Tim Keating
Apr 25 '14 at 19:33
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Unresolved external symbol in object files
... because the dll was not in memory and had to be loaded via a LoadLibrary call. (FTR)
– tmj
Sep 2 '14 at 10:08
2
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Using braces with dynamic variable names in PHP
I'm trying to use dynamic variable names (I'm not sure what they're actually called) But pretty much like this:
8 Answers
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Get object by id()? [duplicate]
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@HamidFzM No, not really. If I have an ID, I maybe don't even know whether the object still exists or not.
– glglgl
Jul 21 '14 at 8:13
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How to call C from Swift?
Is there a way to call C routines from Swift?
6 Answers
6
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Disable Logback in SpringBoot
...-boot-starter-* dependency is a huge hassle. It seems like Gradle at least allows a global exclusion. This alone is seriously making me consider switching from Maven.
– scottysseus
Apr 26 '19 at 20:46
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Rank function in MySQL
... (SELECT @curRank := 0) r
ORDER BY age;
The (SELECT @curRank := 0) part allows the variable initialization without requiring a separate SET command.
Test case:
CREATE TABLE person (id int, first_name varchar(20), age int, gender char(1));
INSERT INTO person VALUES (1, 'Bob', 25, 'M');
INSERT I...
Which SQL query is faster? Filter on Join criteria or Where clause?
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Performance-wise, they are the same (and produce the same plans)
Logically, you should make the operation that still has sense if you replace INNER JOIN with a LEFT JOIN.
In your very case this will look like this:
SELECT *
FROM TableA a
LEFT JOIN
TableXRef x
ON x.TableAID = ...
MongoDB Aggregation: How to get total records count?
...sults simultaneously in single query. I can't explain how I felt when I finally achieved it LOL.
$result = $collection->aggregate(array(
array('$match' => $document),
array('$group' => array('_id' => '$book_id', 'date' => array('$max' => '$book_viewed'), 'views' => array('...