大约有 41,000 项符合查询结果（耗时：0.0201秒） [XML]
How to concatenate text from multiple rows into a single text string in SQL server?
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I had to cast it to NVarchar(max) to get it work.. ``` SELECT STRING_AGG(CAST(EmpName as NVARCHAR(MAX)), ',') FROM EmpTable as t ```
– Varun
17 hours ago
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How to get a enum value from string in C#?
... "0x80000002". Enum.Parse() method is useless in this case because you can cast the enum member to uint and get the value - 2147483650. Enum.Parse() of course gives the same result but instead of hardcoding a string as a parameter you can cast directly the enum variable you're working with.
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Why is there no std::stou?
...tee decided to go for such a C-ish approach? Something like boost::lexical_cast<>() seems like a more C++ way of doing things.
– Paul Manta
Jan 3 '12 at 17:27
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When to use IList and when to use List
...ive the user the richest possible set of operations without them having to cast around. So in that case, if it's a List<T> internally, return a copy as a List<T>.
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MySQL/SQL: Group by date only on a Datetime column
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Cast the datetime to a date, then GROUP BY using this syntax:
SELECT SUM(foo), DATE(mydate) FROM a_table GROUP BY DATE(a_table.mydate);
Or you can GROUP BY the alias as @orlandu63 suggested:
SELECT SUM(foo), DATE(mydate) ...
Handle Guzzle exception and get HTTP body
...bled across this in the docs: \GuzzleHttp\Psr7\str($e->getResponse()) Casting the response as a Psr7 String got me a nicely formatted and complete error message.
– Andy Place
Dec 20 '16 at 23:29
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Never seen before C++ for loop
...u--; is different from 0, it will be interpreted as true (i.e., implicitly casted to the boolean value true). If, instead, its value is 0, it will be casted to false.
This is very bad code.
Update: I discussed the writing of "for" loops in this blog post. Its recommendations can be summarized in t...
Sorting HashMap by values [duplicate]
..., I ended up with a reversed loop for over .entrySet().toArray(), may be a cast could solve it, I need more time to test :)
– Aquarius Power
Dec 28 '15 at 15:41
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Swift - How to convert String to Double
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For a little more Swift feeling, using NSFormatter() avoids casting to NSString, and returns nil when the string does not contain a Double value (e.g. "test" will not return 0.0).
let double = NSNumberFormatter().numberFromString(myString)?.doubleValue
Alternatively, extending Swif...
Dynamically adding properties to an ExpandoObject
...ndo implements IDictionary<string, object>. I've always thought that cast would copy it to a dictionary. However, your post made me understand that if you change the Dictionary, you also change the underlying ExpandoObject! Thanks a lot
– Dynalon
Jan 27 '...