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What's the best way to check if a String represents an integer in Java?
I normally use the following idiom to check if a String can be converted to an integer.
38 Answers
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Why should a Java class implement comparable?
... }
}
later..
/**
* List the authors. Sort them by name so it will look good.
*/
public List<Author> listAuthors(){
List<Author> authors = readAuthorsFromFileOrSomething();
Collections.sort(authors);
return authors;
}
/**
* List unique authors. Sort them by name so it...
How to determine a user's IP address in node
...ur request object there is a property called connection, which is a net.Socket object. The net.Socket object has a property remoteAddress, therefore you should be able to get the IP with this call:
request.connection.remoteAddress
See documentation for http and net
EDIT
As @juand points out in ...
How to check internet access on Android? InetAddress never times out
I got a AsyncTask that is supposed to check the network access to a host name. But the doInBackground() is never timed out. Anyone have a clue?
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How to make the window full screen with Javascript (stretching all over the screen)
How can I make a visitor's browser go fullscreen using JavaScript, in a way that works with IE, Firefox and Opera?
19 Answe...
Convert a Unicode string to a string in Python (containing extra symbols)
How do you convert a Unicode string (containing extra characters like £ $, etc.) into a Python string?
9 Answers
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Case insensitive string as HashMap key
I would like to use case insensitive string as a HashMap key for the following reasons.
12 Answers
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LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...sets:
warehouses/wh1..wh6/: capacity;
vendors/v1..v8/: demand;
links(warehouses,vendors): cost, volume;
endsets
!目标函数;
min=@sum(links: cost*volume);
!需求约束;
@for(vendors(J):
@sum(warehouses(I): volume(I,J))=demand(J));
!产量约束;
@for(warehouses(I):
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Unique (non-repeating) random numbers in O(1)?
I'd like to generate unique random numbers between 0 and 1000 that never repeat (i.e. 6 doesn't show up twice), but that doesn't resort to something like an O(N) search of previous values to do it. Is this possible?
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How do I list all remote branches in Git 1.7+?
...e tried git branch -r , but that only lists remote branches that I've tracked locally. How do I find the list of those that I haven't? (It doesn't matter to me whether the command lists all remote branches or only those that are untracked.)
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