大约有 49,000 项符合查询结果（耗时：0.0637秒） [XML]
Weighted random numbers
...or is more than a few dozen items long (basically, you have to profile to know if this helps or hinders), then there is an optimisation:
By storing the cumulative weight sum in each item you can use a binary search to pick the item corresponding to the pick weight.
If you do not know the number ...
Checkout another branch when there are uncommitted changes on the current branch
...you run:
git checkout branch2
Sometimes Git says "OK, you're on branch2 now!" Sometimes, Git says "I can't do that, I'd lose some of your changes."
If Git won't let you do it, you have to commit your changes, to save them somewhere permanent. You may want to use git stash to save them; this is...
Repeat String - Javascript
...
This problem is a well-known / "classic" optimization issue for JavaScript, caused by the fact that JavaScript strings are "immutable" and addition by concatenation of even a single character to a string requires creation of, including memory alloca...
How to get an enum which is created in attrs.xml in code
... it here ) with an declare-styleable attribute of type enum. In xml I can now choose one of the enum entries for my custom attribute. Now I want to create an method to set this value programmatically, but I can not access the enum.
...
Optional query string parameters in ASP.NET Web API
...
This issue has been fixed in the regular release of MVC4.
Now you can do:
public string GetFindBooks(string author="", string title="", string isbn="", string somethingelse="", DateTime? date= null)
{
// ...
}
and everything will work out of the box.
...
Git merge two local branches
I have branch Master , branchA and branchB .
Now I'm working in the branchA and I need to merge branchA with branchB and proceed my work in the branchA . All files are comitted in the branchA and branchB .
...
How to select records from last 24 hours using SQL?
...elect the last 24 hours from a datetime field, substitute 'curate()' with 'now()'. This also includes the time.
– Haentz
Apr 30 '11 at 6:11
...
How can I get the DateTime for the start of the week?
How do I find the start of the week (both Sunday and Monday) knowing just the current time in C#?
32 Answers
...
What is an invariant?
...
It is a condition you know to always be true at a particular place in your logic and can check for when debugging to work out what has gone wrong.
share
|
...
PowerShell script to return versions of .NET Framework on a machine?
...0 ...
EDIT: For .Net 4.5 and up, this changed slightly again, so there's now a nice MSDN article here explaining how to convert the Release value to a .Net version number, it's a total train wreck :-(
This looks right to me (note that it outputs separate version numbers for WCF & WPF on 3.0. ...