大约有 45,000 项符合查询结果（耗时：0.0474秒） [XML]
Writing handler for UIAlertAction
...on!) in println("Foo")}))
this is the proper way to define handlers in Swift.
As Brian pointed out below, there are also easier ways to define these handlers. Using his methods is discussed in the book, look at the section titled Closures
...
How to query MongoDB with “like”?
...
Actually, it depends. If the query doesn't use an index, and must do a table scan, then it can certainly be expensive. If you're doing a 'starts with' regex query, then that can use an index. Best to run an explain() to see what's happening.
...
Store a closure as a variable in Swift
...e realized with an optional:
var completionHandler: ((Float)->Void)?
Now the property is automatically initialized to nil ("no value").
In Swift you would use optional binding to check of a the
completion handler has a value
if let handler = completionHandler {
handler(result)
}
or opti...
SQLAlchemy - Getting a list of tables
...les:
>>> metadata.tables.keys()
['posts', 'comments', 'users']
If you're using the declarative extension, then you probably aren't managing the metadata yourself. Fortunately, the metadata is still present on the baseclass,
>>> Base = sqlalchemy.ext.declarative.declarative_ba...
“No such file or directory” error when executing a binary
...
If anyone still got problems after installing the library mentioned above, try the following (it worked for me): sudo apt-get install libc6-i386 lib32stdc++6 lib32gcc1 lib32ncurses5 lib32z1
– ctitze
...
One-liner to recursively list directories in Ruby?
...
Thanks @x-yuri! The flag btw is specified like this: Dir.glob("**/*", File::FNM_DOTMATCH)
– vlz
Nov 5 '14 at 11:50
2
...
How to print the ld(linker) search path
...
You can try to manually specify library paths with the -L option to GCC, which I think (not sure) will override the system library paths. You could also try to set the LIBRARY_PATH env variable before compiling: $ LIBRARY_PATH=/somedir/ gcc ...
...
Input text dialog Android
...rtDialog. You can customize the type of input allowed using setInputType, if you need.
If you're able to use a member variable, you can simply set the variable to the value of the EditText, and it will persist after the dialog has dismissed. If you can't use a member variable, you may need to use...
What are the differences between .so and .dylib on osx?
...-dynamiclib flag to the compiler. (-fPIC is the default and needn't be specified.)
Loadable modules are called "bundles" in Mach-O speak. They have the file type MH_BUNDLE. They can carry any extension; the extension .bundle is recommended by Apple, but most ported software uses .so for the sake of...
What is the difference between range and xrange functions in Python 2.X?
...f besides the anecdotal so far that it is faster) or what besides that is different about
28 Answers
...