大约有 31,100 项符合查询结果（耗时：0.0624秒） [XML]
How to COUNT rows within EntityFramework without loading contents?
...
Query syntax:
var count = (from o in context.MyContainer
where o.ID == '1'
from t in o.MyTable
select t).Count();
Method syntax:
var count = context.MyContainer
.Where(o => o.ID == '1')
.SelectMany(o =...
How to remove “Server name” items from history of SQL Server Management Studio
... It's a pity, that I can't delete exactly group of server, not all my user settings.
– Johnny_D
Nov 4 '13 at 20:39
2
...
Get push notification while App in foreground iOS
I am using push notification service in my app. When app is in background I am able to see notification on notification screen(screen shown when we swipe down from top of iOS device). But if application is in foreground the delegate method
...
How can I convert a datetime object to milliseconds since epoch (unix time) in Python?
...
@suhail: read my comment above about mktime/timetuple. Also timetuple() strips fractions of a second and the point of the question is to get the timestamp with millisecond precision.
– jfs
Dec 29 '14 ...
How do I make a batch file terminate upon encountering an error?
...or goto" type of construct in cmd.exe/command.com batch. I've also updated my code per CodeMonkey, although I've never encountered a negative errorlevel in any of my batch-hacking on XP or Vista.
share
|
...
How do I make jQuery wait for an Ajax call to finish before it returns?
....ajax() function to return immediately, set the async option to false:
$(".my_link").click(
function(){
$.ajax({
url: $(this).attr('href'),
type: 'GET',
async: false,
cache: false,
timeout: 30000,
fail: function(){
return true;
...
Is there a way to detect if a browser window is not currently active?
...
@JulienKronegg: that's why my answer specifically mentions the Page Visibility API which entered working draft status after I originally wrote my answer. The focus/blur methods provide limited functionality for older browsers. Binding to other events, ...
Create singleton using GCD's dispatch_once in Objective-C
...
@Dave DeLong: In my opinion purpose of having singleton is not a certainty of its immortality, but certainty that we have one instance. What if that singleton decrement a semaphore? You can't just arbitrary say that it will always exists.
...
What is the proper way to check for null values?
...
This was the most direct answer to my question so I'm marking the answer, but Jon Skeet's extension method .ToStringOrDefault() is my preferred way of doing it. However, I am using this answer within Jon's extension method ;)
– Chev
...
The difference between sys.stdout.write and print?
...
My question is whether or not there
are situations in which
sys.stdout.write() is preferable to
print
After finishing developing a script the other day, I uploaded it to a unix server. All my debug messages used print...