大约有 2,670 项符合查询结果（耗时：0.0151秒） [XML]
What is the difference between IQueryable and IEnumerable?
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The only benefit is convenience. AsQueryable() will just cast an enumerable to a queryable and return it if it implements the IQueryable interface, otherwise it wraps it in a ConstantExpression, which is referred to in a returned EnumerableQuery object.
– Mar...
How to remove items from a list while iterating?
... Python lists, with minimal modifications. For instance, not all languages cast empty lists to a False as Python does. You can substitute while somelist: for something more explicit like while len(somelist) > 0:.
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Average of 3 long integers
...nsigned average, subtract it after taking the result, and use an unchecked cast back to Int64 to get a signed average.
To compute the unsigned average, compute the sum of the top 32 bits of the three values. Then compute the sum of the bottom 32 bits of the three values, plus the sum from above, p...
Extending from two classes
...rawback is that you cannot fit into the Mold of the Internal class using a cast.
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Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
...net as well in msdn.microsoft.com/en-us/library/ms164891.aspx, however the cast is probably not defined for vb.net, and instead you should probably do DirectCast ($exception,System.Data.Entity.Validation.DbEntityValidationException)
– yoel halb
Jul 16 '15 at 19...
Type converting slices of interfaces
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Try interface{} instead. To cast back as slice, try
func foo(bar interface{}) {
s := bar.([]string)
// ...
}
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Java client certificates over HTTPS/SSL
...contains the client certificate and client private key, created with BouncyCastle:
public static byte[] convertPEMToPKCS12(final String keyFile, final String cerFile,
final String password)
throws IOException, CertificateException, KeyStoreException, NoSuchAlgorithmException,
NoSuchProv...
Why does one often see “null != variable” instead of “variable != null” in C#?
...ed order. This is all confusing to have the operator call itself. Instead, cast either operand (or both) to object to get the desired overload. Like if ((object)a == null) or if (a == (object)null).
– Jeppe Stig Nielsen
May 3 '13 at 21:38
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Splitting a string into chunks of a certain size
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Side note: your usage example is wrong. You can't just cast IEnumerable to array, especially not implicitly.
– Nyerguds
Nov 10 '16 at 10:12
SQL - The conversion of a varchar data type to a datetime data type resulted in an out-of-range valu
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Just used cast(SUBSTRING([MyDateField],1,2) as integer) > 31 and found a record with the 60th of December. Who enters this stuff, Dr Suess?
– SteveCav
Oct 21 '15 at 22:11
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