大约有 15,510 项符合查询结果（耗时：0.0279秒） [XML]
'printf' vs. 'cout' in C++
... You say I/O is the bottleneck anyway. Obviously you never tested that assumption. I quote myself: "On the other hand, the iostreams version, at 75.3 MB/s, can't buffer data fast enough to keep up with a hard disk. That's bad, and it's not even doing any real work yet. I don't think...
How to iterate over arguments in a Bash script
...oted the arguments are broken up properly if there are spaces in them:
sh test.sh 1 2 '3 4'
1
2
3 4
share
|
improve this answer
|
follow
|
...
Biggest differences of Thrift vs Protocol Buffers?
...rotobuf currently relies on third-party libraries, meaning less eyes, less testing, less reliable code.
– Alec Thomas
May 17 '10 at 2:32
2
...
CSS scrollbar style cross browser [duplicate]
How can I define a CSS scrollbar style cross browser? I tested this code, it only works in IE and opera, but failed in Chrome, Safari and Firefox.
...
Any way to break if statement in PHP?
...
I needed to execute the same code after each successful test (about 3 or 4 tests), and put an elseif on each failed test. This is exactly what I was searching for, now my code is KISS and DRY compliant :) Thanks!
– s3v3n
Jul 24 '12 at 15:26
...
Once upon a time, when > was faster than < … Wait, what?
... what's it all about, the author mentions that we can perform custom depth tests, such as GL_LESS, GL_ALWAYS, etc. He also explains that the actual meaning of depth values (which is top and which isn't) can also be customized. I understand so far. And then the author says something unbelievable:
...
How to check whether a string is Base64 encoded or not
...ntation: commons.apache.org/proper/commons-codec/apidocs/org/apache/… : "Tests a given String to see if it contains only valid characters within the Base64 alphabet. Currently the method treats whitespace as valid." This means that this methods has some false positives like "whitespace" or numbers...
MySQL: Sort GROUP_CONCAT values
....html#function_group-concat:
SELECT student_name,
GROUP_CONCAT(DISTINCT test_score ORDER BY test_score DESC SEPARATOR ' ')
FROM student
GROUP BY student_name;
share
|
improve this answer
...
Getting started with Haskell
... bit more difficult in Haskell. Check this SO question in case you want to test your solutions with QuickCheck (see Intermediate below).
Once you have done a few of those, you could move on to doing a few of the Project Euler problems. These are sorted by how many people have completed them, which i...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...simple:
-- THIS IS WRONG. DO NOT COPY IT. It's an EXAMPLE.
BEGIN;
UPDATE testtable
SET somedata = 'blah'
WHERE id = 2;
-- Remember, this is WRONG. Do NOT COPY IT.
INSERT INTO testtable (id, somedata)
SELECT 2, 'blah'
WHERE NOT EXISTS (SELECT 1 FROM testtable WHERE testtable.id = 2);
COMMIT;
th...