大约有 16,000 项符合查询结果(耗时:0.0286秒) [XML]
Optimise PostgreSQL for fast testing
...seful reference.
Join the PostgreSQL general mailing list and follow it.
Reading:
Tuning your PostgreSQL server - PostgreSQL wiki
Number of database connections - PostgreSQL wiki
share
|
improv...
Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
...nt, I have to concur that the question AS ASKED is about if they are the already asking for all columns. Because of this part of the question, the real issues is fragility in the face of schema changes.
– IDisposable
Sep 17 '08 at 20:01
...
What is tail recursion?
... of the next recursive call.
The consequence of this is that once you are ready to perform your next recursive step, you don't need the current stack frame any more. This allows for some optimization. In fact, with an appropriately written compiler, you should never have a stack overflow snicker wi...
Comet and jQuery [closed]
... share some tutorials/documentations/demos of your plugin. when i click on Read Documentation in JQuery plugin site, it takes me to ur home page, but i cant find any documentation there. Pls help me.
– Raghav
May 31 '11 at 11:20
...
Naming of ID columns in database tables
...ch more difficult. It obscures meaning and makes complex queries harder to read as well as requiring you to use aliases to differentiate on the report itself.
Further if someone is foolish enough to use a natural join in a database where they are available, you will join to the wrong records.
If...
AngularJS : When to use service instead of factory
...
Re First: I read that everywhere but I don't understand the practical implications of it. I guess from your answer there is no practical difference "for the most part"? Thanks for the book ref though!
– user1941747
...
Struct like objects in Java
...a. IMHO, that is a poor suggestion, as it could lead to confusion by human readers. Basic principle: don't make a reader do a double-take; make it obvious what you are saying -- Use different names for different entities. Even if the difference is merely to prepend an underscore. Don't rely on surro...
Should __init__() call the parent class's __init__()?
...ing a hair, and moreover there have been nobody to react in 2 years in a thread whose interesting subject must be read relatively often.
share
|
improve this answer
|
follow
...
What is the difference between #include and #include “filename”?
...
The only way to know is to read your implementation's documentation.
In the C standard, section 6.10.2, paragraphs 2 to 4 state:
A preprocessing directive of the form
#include <h-char-sequence> new-line
searches a sequence of imple...
Why must wait() always be in synchronized block
...hen there is also a notify(), so it's always about communication between threads, and that needs synchronization to work correctly. One could argue that this should be implicit, but that would not really help, for the following reason:
Semantically, you never just wait(). You need some condition to...
