大约有 16,000 项符合查询结果（耗时：0.0391秒） [XML]
LINQ .Any VS .Exists - What's the difference?
...s is new in .NET 3.5 and uses Func(TSource, bool) as argument, so this was intended to be used with lambda expressions and LINQ.
In behaviour, these are identical.
share
|
improve this answer
...
Why Would I Ever Need to Use C# Nested Classes [duplicate]
...t then refers to, I am not sure about, however (there is only one bullet point).
– Noldorin
Jul 5 '09 at 10:01
4
...
How to Reverse Fragment Animations on BackStack?
... AreusAstarte: see developer.android.com/reference/android/app/…, int, int, int)
– mDroidd
Dec 25 '13 at 10:33
...
Python - Create a list with initial capacity
...can be expressed in Python, but nobody has yet posted it here. haridsv's point was that we're just assuming 'int * list' doesn't just append to the list item by item. That assumption is probably valid, but haridsv's point was that we should check that. If it wasn't valid, that would explain why the ...
Select rows of a matrix that meet a condition
...
This is easier to do if you convert your matrix to a data frame using as.data.frame(). In that case the previous answers (using subset or m$three) will work, otherwise they will not.
To perform the operation on a matrix, you can define a column by nam...
Why does Node.js' fs.readFile() return a buffer instead of string?
...
It is returning a Buffer object.
If you want it in a string, you can convert it with data.toString():
var fs = require("fs");
fs.readFile("test.txt", function (err, data) {
if (err) throw err;
console.log(data.toString());
});
...
SQL Server add auto increment primary key to existing table
... - you have to do it the other way around: add it right from the get go as INT IDENTITY - it will be filled with identity values when you do this:
ALTER TABLE dbo.YourTable
ADD ID INT IDENTITY
and then you can make it the primary key:
ALTER TABLE dbo.YourTable
ADD CONSTRAINT PK_YourTable
...
Measuring the distance between two coordinates in PHP
... $longitudeFrom, $latitudeTo, $longitudeTo, $earthRadius = 6371000)
{
// convert from degrees to radians
$latFrom = deg2rad($latitudeFrom);
$lonFrom = deg2rad($longitudeFrom);
$latTo = deg2rad($latitudeTo);
$lonTo = deg2rad($longitudeTo);
$latDelta = $latTo - $latFrom;
$lonDelta = $lo...
Sleep Command in T-SQL?
...ate a WHILE loop like this: CREATE FUNCTION [dbo].[ForcedTimeout](@seconds int) returns int as BEGIN DECLARE @endTime datetime2(0) = DATEADD(SECOND, @seconds, GETDATE()); WHILE (GETDATE() < @endTime ) BEGIN SET @endTime = @endTime; -- do nothing, but SQL requires a statement. END
...
Trying to understand CMTime and CMTimeMake
...he following code makes the concept more clear:
1)
Float64 seconds = 5;
int32_t preferredTimeScale = 600;
CMTime inTime = CMTimeMakeWithSeconds(seconds, preferredTimeScale);
CMTimeShow(inTime);
The above code gives:
{3000/600 = 5.000}
Which means a total duration of 5 seconds, with 3000 frames...