大约有 47,000 项符合查询结果（耗时：0.0554秒） [XML]
What is the use case of noop [:] in bash?
...ver'
done
It's traditional to use : when the shell syntax requires a command but you have nothing to do.
while keep_waiting; do
: # busy-wait
done
The : builtin dates all the way back to the Thompson shell, it was present in Unix v6. : was a label indicator for the Thompson shell's goto state...
When do you use Java's @Override annotation and why?
What are the best practices for using Java's @Override annotation and why?
27 Answers
...
Is there common street addresses database design for all addresses of the world? [closed]
I am a programmer and to be honest don't know street address structures of the world, just how in my country is structured :) so which is the best and common database design for storing street addresses? It should be so simple to use, fast to query and dynamic to store all street addresses of the w...
Greedy vs. Reluctant vs. Possessive Quantifiers
I found this excellent tutorial on regular expressions and while I intuitively understand what "greedy", "reluctant" and "possessive" quantifiers do, there seems to be a serious hole in my understanding.
...
Convert char to int in C and C++
How do I convert a char to an int in C and C++?
12 Answers
12
...
How to create a memory leak in Java?
I just had an interview, and I was asked to create a memory leak with Java.
Needless to say, I felt pretty dumb having no clue on how to even start creating one.
...
Is an index needed for a primary key in SQLite?
...
It does it for you.
INTEGER PRIMARY KEY columns aside, both UNIQUE and PRIMARY KEY
constraints are implemented by creating an index in the database (in
the same way as a "CREATE UNIQUE INDEX" statement would). Such an
index is used like any other index in the database to optimize
que...
Hibernate Annotations - Which is better, field or property access?
... Note this is about how the ORM accesses your fields/properties and not your application code. With field access your getNickName() method would work exactly as you'd expect. The same is not true if you use the persistent 'properties' outside getters/setters. That is where you may hit i...
or (HTML5)
W3Schools.com and I'm pretty sure I remember seeing W3C.org state that <menu> should be used for Toolbar menus and listing form control commands.
...
What are the best JVM settings for Eclipse? [closed]
...gain: "eclipse.ini take 3" the settings strike back!
Eclipse Helios 3.6 and 3.6.x settings
alt text http://www.eclipse.org/home/promotions/friends-helios/helios.png
After settings for Eclipse Ganymede 3.4.x and Eclipse Galileo 3.5.x, here is an in-depth look at an "optimized" eclipse.ini settin...