大约有 40,000 项符合查询结果（耗时：0.0928秒） [XML]
How do I monitor the computer's CPU, memory, and disk usage in Java?
... = 390625000 is only how long that thread has been running. That is not really useful for determining the processor usage
– MikeNereson
Jul 14 '09 at 15:35
2
...
Suggestions for debugging print stylesheets?
...; Rendering Settings > Emulate media > print
– allicarn
Jul 7 '16 at 22:22
...
What is the best way to dump entire objects to a log in C#?
So for viewing a current object's state at runtime, I really like what the Visual Studio Immediate window gives me. Just doing a simple
...
How to generate a random int in C?
...
Note: Don't use rand() for security. If you need a cryptographically secure number, see this answer instead.
#include <time.h>
#include <stdlib.h>
srand(time(NULL)); // Initialization, should only be called once.
int r = rand(); // Returns a pseudo-random integer bet...
Why does viewWillAppear not get called when an app comes back from the background?
...
In other words, if someone looks at another application or takes a phone call, then switches back to your app which was earlier on backgrounded, your UIViewController which was already visible when you left your app 'doesn't care' so to speak -- as far as it is concerned, it's never disappeared and...
qmake: could not find a Qt installation of ''
...
sudo apt-get install qt5-default works for me.
$ aptitude show qt5-default
tells that
This package sets Qt 5 to be the default Qt version to be used when using
development binaries like qmake. It provides a default configuration for
...
How to grep (search) committed code in the Git history
...s and the like), you need to do:
git grep <regexp> $(git rev-list --all)
git rev-list --all | xargs git grep <expression> will work if you run into an "Argument list too long" error.
If you want to limit the search to some subtree (for instance, "lib/util"), you will need to pass tha...
ALTER TABLE to add a composite primary key
I have a table called provider . I have three columns called person , place , thing . There can be duplicate persons, duplicate places, and duplicate things, but there can never be a dupicate person-place-thing combination.
...
Versioning SQL Server database
...cript means being able to "spin up" a fresh database without going through all the migration steps. It also makes it possible to diff the current version against accumulated previous versions.
– mlibby
Jun 16 '09 at 21:50
...
When should I use semicolons in SQL Server?
...
Seems they're basically encouraging use of the semicolon in general, by requiring it before all new statement types that have been introduced in recent years. (MERGE too for example). As mentioned in other answers, in the ANSI standard they a...