大约有 48,000 项符合查询结果（耗时：0.0934秒） [XML]
Random row from Linq to Sql
... select row).FirstOrDefault();
Note that this is only suitable for small-to-mid-size tables; for huge tables, it will have a performance impact at the server, and it will be more efficient to find the number of rows (Count), then pick one at random (Skip/First).
for count approach:
var qry...
Is there a command line utility for rendering GitHub flavored Markdown?
...
I wrote a small CLI in Python and added GFM support. It's called Grip (Github Readme Instant Preview).
Install it with:
$ pip install grip
And to use it, simply:
$ grip
Then visit localhost:5000 to view the readme.md file at that ...
SetUnhandledExceptionFilter and the C/C++ Runtime Library - C/C++ - 清...
...unctionality by the means of the SetUnhandledExceptionFilter function.
Usually, the SetUndhandledExceptionFilter function is used in conjunction with the crash reporting activity. Having the ability of pinpointing the line of code which caused a crash is invaluable in post mortem debugging.
Post m...
How do I commit only some files?
...available on both branches you do
git stash # remove all changes from HEAD and save them somewhere else
git checkout <other-project> # change branches
git cherry-pick <commit-id> # pick a commit from ANY branch and apply it to the current
git checkout <first-p...
How to make a always full screen?
...
This is the most stable (and easy) way to do it, and it works in all modern browsers:
.fullscreen {
position: fixed;
top: 0;
left: 0;
bottom: 0;
right: 0;
overflow: auto;
background: lime; /* Just to visualize the extent */
}
<div class="fullscreen">
...
How to check file input size with jQuery?
...
You actually don't have access to filesystem (for example reading and writing local files), however, due to HTML5 File Api specification, there are some file properties that you do have access to, and the file size is one of them.
F...
Add zero-padding to a string
...uncate it. This doesn't detract from this answer by the way since it meets all the specs (there's something strangely satisfying about having an answer you upvoted chosen as the accepted one (though not as satisfying as having one of your own accepted of course), sort of like your son getting into t...
Remove last character of a StringBuilder?
...
@Harish - and possibly not at all, if the optimizer unrolls the first loop iteration.
– Stephen C
Aug 27 '12 at 14:28
7
...
Create the perfect JPA entity [closed]
...nd your time on what's important.
Constructors: create a constructor with all required fields of the entity?
Constructor(s) for application logic, should have only a few critical "foreign key" or "type/kind" fields which will always be known when creating the entity. The rest should be set by call...
Adding a column to a data.frame
...
@RomanLuštrik, This solution can be rewritten really nicely in a single line. Using your your.df data, you can simply do your.df$group = cumsum(your.df[, 1]==1) to get your new group column.
– A5C1D2H2I1M1N2O1R2T1
Apr 16 '12 at 17:47
...