大约有 47,000 项符合查询结果（耗时：0.0729秒） [XML]
How to do a LIKE query in Arel and Rails?
...
This is how you perform a like query in arel:
users = User.arel_table
User.where(users[:name].matches("%#{user_name}%"))
PS:
users = User.arel_table
query_string = "%#{params[query]}%"
param_matches_string = ->(param){
users[param].ma...
Regex empty string or email
...tring. Is this possible through Regex only? Accepting either empty string or email only? I want to have this on Regex only.
...
Useful code which uses reduce()? [closed]
...
The other uses I've found for it besides + and * were with and and or, but now we have any and all to replace those cases.
foldl and foldr do come up in Scheme a lot...
Here's some cute usages:
Flatten a list
Goal: turn [[1, 2, 3], [4, 5], [6, 7,...
Are members of a C++ struct initialized to 0 by default?
...o. You cannot use these aggregate initializer lists if you've got constructors in your struct. If that is the case, you will have to add proper initalization to those constructors
struct Snapshot {
int x;
double y;
Snapshot():x(0),y(0) { }
// other ctors / functions...
};
Will ini...
How to check whether an array is empty using PHP?
players will either be empty or a comma separated list (or a single value). What is the easiest way to check if it's empty? I'm assuming I can do so as soon as I fetch the $gameresult array into $gamerow ? In this case it would probably be more efficient to skip exploding the $playerlist if it...
How can I tell if I'm running in 64-bit JVM or 32-bit JVM (from within a program)?
How can I tell if the JVM in which my application runs is 32 bit or 64-bit? Specifically, what functions or properties I can used to detect this within the program?
...
What are POD types in C++?
...
POD stands for Plain Old Data - that is, a class (whether defined with the keyword struct or the keyword class) without constructors, destructors and virtual members functions. Wikipedia's article on POD goes into a bit more detail and d...
Which cryptographic hash function should I choose?
The .NET framework ships with 6 different hashing algorithms:
9 Answers
9
...
What happens to global and static variables in a shared library when it is dynamically linked?
...nked to an application.
By modules, I mean each project in a solution (I work a lot with visual studio!). These modules are either built into *.lib or *.dll or the *.exe itself.
...
Python exit commands - why so many and when should each be used?
It seems that python supports many different commands to stop script execution. The choices I've found are: quit() , exit() , sys.exit() , os._exit()
...