大约有 16,000 项符合查询结果（耗时：0.0248秒） [XML]
How to make Entity Framework Data Context Readonly
...Set<Customer>().AsNoTracking();
}
}
public override int SaveChanges()
{
// Throw if they try to call this
throw new InvalidOperationException("This context is read-only.");
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
...
How to design RESTful search/filtering? [closed]
...uage, this might still be a good convention and you can create a parser to convert [] to an array.
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Static table view outside UITableViewController
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Yikes. The amount of re-work it would require to convert to not static due to all the IBOutlets in my view controller file is too much, and IMO it's unacceptable for an update to break this with no warning or note of this in the change log (ergo I assume it's still perfectl...
Append TimeStamp to a File Name
...e_" + DateTime.Now.ToFileTime() + ".txt";
What does ToFileTime() do?
Converts the value of the current DateTime object to a Windows file time.
public long ToFileTime()
A Windows file time is a 64-bit value that represents the number of 100-nanosecond intervals that have elapsed sinc...
Avoiding SQL injection without parameters
...weird. The parser is capable of identifying constants in the text and can convert the SQL string to one the uses parameters artificially. It can then insert into the cache the text of this new parameterised query. Subsequent similar SQL may find its parameterised version matched in the cache. Ho...
How to break out of a loop from inside a switch?
...e no terminating condition. (Arguably, this has already happened, so the point is moot.)
Alternative to "Go To"
The following code is better form:
while( isValidState() ) {
execute();
}
bool isValidState() {
return msg->state != DONE;
}
Advantages
No flag. No goto. No exception. Easy...
How to compare strings ignoring the case
...) == 0
"Apple".casecmp("APPLE") == 0
#=> true
Alternatively, you can convert both strings to lower case (str.downcase) and compare for equality.
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Get records with max value for each group of grouped SQL results
...nditions" be better put in the final WHERE condition list, in order to not introduce subqueries - which were not needed in the original @ axiac answer?
– tarilabs
Dec 14 '15 at 23:18
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equals vs Arrays.equals in Java
...ay2) is the same as array1 == array2, i.e. is it the same array. As @alf points out it's not what most people expect.
Arrays.equals(array1, array2) compares the contents of the arrays.
Similarly array.toString() may not be very useful and you need to use Arrays.toString(array).
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Pimpl idiom vs Pure virtual class interface
...pile-time dependencies. Often, it's not worth the bother. As you rightly point out, there's more syntactic overhead because you have to write forwarding methods for all of the public methods. For type 2 classes, I always use a pure abstract base class with associated factory method(s).
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