大约有 42,000 项符合查询结果(耗时:0.0614秒) [XML]
Is it possible to Pivot data using LINQ?
...).Sum(c => c.Qty),
March = g.Where(c => c.OrderDate.Month == 3).Sum(c => c.Qty)
});
GroupBy in Linq does not work the same as SQL. In SQL, you get the key and aggregates (row/column shape). In Linq, you get the key and any elements as children of the key (hierarchical shape)...
How can I get the full/absolute URL (with domain) in Django?
...
530
Use handy request.build_absolute_uri() method on request, pass it the relative url and it'll gi...
ASP.NET MVC Conditional validation
...
There's a much better way to add conditional validation rules in MVC3; have your model inherit IValidatableObject and implement the Validate method:
public class Person : IValidatableObject
{
public string Name { get; set; }
public bool IsSenior { get; set; }
public Senior Senior...
find: missing argument to -exec
...
344
A -exec command must be terminated with a ; (so you usually need to type \; or ';' to avoid in...
Getting GDB to save a list of breakpoints
...
As of GDB 7.2 (2011-08-23) you can now use the save breakpoints command.
save breakpoints <filename>
Save all current breakpoint definitions to a file suitable for use
in a later debugging session. To read the saved breakpoint
definiti...
Changing capitalization of filenames in Git
...h, 2014), a git mv will just work on a case insensitive OS.
See commit baa37bf by David Turner (dturner-tw).
mv: allow renaming to fix case on case insensitive filesystems
"git mv hello.txt Hello.txt" on a case insensitive filesystem always triggers "destination already exists" error, because the...
Update a dataframe in pandas while iterating row by row
...
rakkerakke
4,81822 gold badges2323 silver badges2828 bronze badges
7
...
Differences between ExpandoObject, DynamicObject and dynamic
... |
edited Aug 18 '16 at 13:04
RJFalconer
7,84833 gold badges4141 silver badges5858 bronze badges
answer...
Sending HTML email using Python
...
433
From Python v2.7.14 documentation - 18.1.11. email: Examples:
Here’s an example of how to...
