大约有 36,010 项符合查询结果（耗时：0.0309秒） [XML]
How to get RelativeLayout working with merge and include?
...on than packing <include/> into another layout. Think what would you do if you would work with lists.
– teoREtik
Feb 2 '12 at 13:31
2
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How do I use Java to read from a file that is actively being written to?
... I'd like to be able to read the file as it is being written so that I can do these pass/failure/correctness checks in real time.
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Using Transactions or SaveChanges(false) and AcceptAllChanges()?
...nt. This creates a transaction, or enlists in any ambient transaction, and does all the necessary work in that transaction.
Sometimes though the SaveChanges(false) + AcceptAllChanges() pairing is useful.
The most useful place for this is in situations where you want to do a distributed transaction...
Changing git commit message after push (given that no one pulled from remote)
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Changing history
If it is the most recent commit, you can simply do this:
git commit --amend
This brings up the editor with the last commit message and lets you edit the message. (You can use -m if you want to wipe out the old message and use a new one.)
Pushing
And then when you pus...
What does default(object); do in C#?
...s a zero-initialized value
For Nullable<T> it returns the empty (pseudo-null) value (actually, this is a re-statement of the first bullet, but it is worth making it explicit)
The biggest use of default(T) is in generics, and things like the Try... pattern:
bool TryGetValue(out T value) {
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Getting SyntaxError for print with keyword argument end=' '
... to print with a tuple as argument.
That's obviously bad syntax (literals don't take keyword arguments). In Python 3.x print is an actual function, so it takes keyword arguments, too.
The correct idiom in Python 2.x for end=" " is:
print "foo" % bar,
(note the final comma, this makes it end the...
What does placing a @ in front of a C# variable name do? [duplicate]
...e and I've been seeing a lot of @ symbols in front of variable names. What does this signify or do?
6 Answers
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Timeout on a function call
...exception that you can intercept from the regular Python code.
This module doesn't play well with threads (but then, who does?)
Note that since we raise an exception when timeout happens, it may end up caught and ignored inside the function, for example of one such function:
def loop_forever():
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Convert SVG to PNG in Python
How do I convert an svg to png , in Python? I am storing the svg in an instance of StringIO . Should I use the pyCairo library? How do I write that code?
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How can I run code on a background thread on Android?
I want some code to run in the background continuously. I don't want to do it in a service. Is there any other way possible?
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