大约有 10,000 项符合查询结果（耗时：0.0190秒） [XML]
Test if string is a number in Ruby on Rails
...
This is a bad idea. "330.346.11".to_f # => 330.346
– epochwolf
Nov 2 '11 at 23:15
11
...
Is it possible to style a select box? [closed]
...
404 - any ideas where there were mirrors?
– Moak
Nov 22 '10 at 15:36
2
...
Is there a concurrent List in Java's JDK?
... the list have structural changes between those two operations).
The very idea of a concurrent collection is that each operation on its own is atomic and can be done without explicit locking/synchronization.
Therefore getting the element at position n from a given List as an atomic operation doesn...
Require either of two arguments using argparse
...
Thanks for the feedback. I had an idea it was solving everything indeed, but wasn't sure any more :D. I'll edit the answer accordingly!
– jlengrand
Apr 14 '18 at 8:48
...
What is the wix 'KeyPath' attribute?
... on the component element itself. In any case, it doesn't seem like a good idea to me.
– Wim Coenen
Jul 5 '10 at 15:12
...
Is it worthwile to learn assembly language? [closed]
...er +1. Learning and using are two different things, learning it is a good idea, when/if to use it comes with experience.
– old_timer
Jul 8 '11 at 19:00
...
How big can a MySQL database get before performance starts to degrade
...he query, data that it operates on, indexes, hardware, etc. You can get an idea of how many rows are going to be scanned and what indexes are going to be used with EXPLAIN syntax.
2GB does not really count as a "large" database - it's more of a medium size.
...
How to create a file with a given size in Linux?
...more efficient than my approach because it does it all in one block. Good idea.
– Paul Tomblin
Sep 26 '08 at 13:02
10
...
How do I get whole and fractional parts from double in JSP/Java?
...
Converting double to int is almost always a bad idea. Because e.g. for (long)1.0e100 you will get 0. A lot of the times you need the double value simply "floored" for which there is floor(). If you want both integral and fraction parts use modf(). Really, this is a bad ans...
What is the point of function pointers?
...; "the answer is: " << i << '\n';}
};
functor f;
f(42);
The idea behind this is that, unlike a function pointer, a function object can carry not only an algorithm, but also data:
class functor {
public:
functor(const std::string& prompt) : prompt_(prompt) {}
void ope...