大约有 43,100 项符合查询结果（耗时：0.0460秒） [XML]
Return two and more values from a method
...
160
def sumdiff(x, y)
return x+y, x-y
end
#=> nil
sumdiff(3, 4)
#=> [7, -1]
a = sumdiff(...
Why would anyone use set instead of unordered_set?
...er places. What I understand is that unordered_set is hash table with O(1) lookup complexity. On the other hand, set is nothing but a tree with log(n) lookup complexity. Why on earth would anyone use set instead of unordered_set? i.e is there a need for set anymore?
...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
...sked a really strange question. The interviewer asked me how can I compute 1+2+3+...+1000 just using compiler features. This means that I am not allowed to write a program and execute it, but I should just write a program that could drive the compiler to compute this sum while compilation and print ...
How can I split a string into segments of n characters?
...
12 Answers
12
Active
...
How to set Python's default version to 3.x on OS X?
...
21 Answers
21
Active
...
Why not use Double or Float to represent currency?
...
16 Answers
16
Active
...
PDO support for multiple queries (PDO_MYSQL, PDO_MYSQLND)
...
141
As I know, PDO_MYSQLND replaced PDO_MYSQL in PHP 5.3. Confusing part is that name is still PDO...
Reorder / reset auto increment primary key
... the table. Now I have, for example, something like this in the ID column: 12, 13, 14, 19, 20. I deleted the 15, 16, 17 and 18 rows.
...
form serialize javascript (no framework)
...
41
The miniature from-serialize library doesn't rely on a framework. Other than something like that...
while (1) Vs. for (;;) Is there a speed difference?
...
218
In perl, they result in the same opcodes:
$ perl -MO=Concise -e 'for(;;) { print "foo\n" }'
a ...