大约有 36,200 项符合查询结果（耗时：0.0468秒） [XML]
Rails extending ActiveRecord::Base
...s would have some special methods. What is the easy way to extend it (step by step tutorial)?
9 Answers
...
How to empty a redis database?
...onger it will take to flush. Since numbered (shared) databases are managed by the same Redis server, this could block your other databases for that duration. If possible, refrain from using shared databases because of that and also because they aren't future-proof (not supported in v3). See here for...
Force add despite the .gitignore file
...d -p foo # works (cannot paste newlines in comment, execute the commands 1 by 1
– Daniel Böhmer
Nov 5 '11 at 10:26
...
How to define two angular apps / modules in one page?
...n the html code, will work correctly, whereas the second is not recognized by angular.
6 Answers
...
Excluding directories in os.walk
...ng dirs in-place will prune the (subsequent) files and directories visited by os.walk:
# exclude = set(['New folder', 'Windows', 'Desktop'])
for root, dirs, files in os.walk(top, topdown=True):
dirs[:] = [d for d in dirs if d not in exclude]
From help(os.walk):
When topdown is true, the calle...
What does the comma operator , do?
...they're not necessary — the comma operator doesn't have to be surrounded by parentheses; and (2) they could be confused with the parentheses around the argument list of a function call — but the comma in the argument list is not the comma operator. However, fixing it is not entirely trivial. ...
Invoking a static method using reflection
...
Sometimes it's much easier to loop and find the method by name than to use getMethod because getMethod (or getDeclaredMethod) requires that you work out the parameter types in great detail. It just depends if micro efficiency matters - Java iteration is very quick so unless you...
Can I export a variable to the environment from a bash script without sourcing it?
...
Is there any way to access to the $VAR by just executing export.bash without sourcing it ?
Quick answer: No.
But there are several possible workarounds.
The most obvious one, which you've already mentioned, is to use source or . to execute the script in the co...
Why can I type alias functions and use them without casting?
...erstanding that I had about how Go dealt with types, which can be resolved by reading the relevant part of the spec:
http://golang.org/ref/spec#Type_identity
The relevant distinction that I was unaware of was that of named and unnamed types.
Named types are types with a name, such as int, int64, ...
What is the “owning side” in an ORM mapping?
...eason for the name 'owning side'?
The owning side of the relation tracked by Hibernate is the side of the relation that owns the foreign key in the database.
What is the problem that the notion of owning side solves?
Take an example of two entities mapped without declaring a owning side:
@Entity...