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Good MapReduce examples [closed]
... -> (C D)
(C D) -> (A B E)
(C E) -> (B D)
(D E) -> (B C)
Now when D visits B's profile, we can quickly look up (B D) and see
that they have three friends in common, (A C E).
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Is there a date format to display the day of the week in java?
I know of date formats such as
"yyyy-mm-dd" -which displays date in format 2011-02-26
"yyyy-MMM-dd" -which displays date in format 2011-FEB-26
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What is a word boundary in regex?
... \b\-?\d+\b ) but it appears that this does not work. I'd be grateful to know of ways of matching space-separated numbers.
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Convert a Git folder to a submodule retrospectively?
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filter-branch is deprecated nowadays. You can use git clone --filter, but your Git server must be configured to allow filtering, otherwise you'll get warning: filtering not recognized by server, ignoring.
– Matthias Braun
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Spring MVC: How to perform validation?
I would like to know what is the cleanest and best way to perform form validation of user inputs. I have seen some developers implement org.springframework.validation.Validator . A question about that: I saw it validates a class. Does the class have to be filled manually with the values from the us...
Is there a command to refresh environment variables from the command prompt in Windows?
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@itsadok - given that this is now the accepted answer, you should add a brief explaination at the start to put the script in context. i.e point out that it isn't possible to propagate an env var change to an open cmd.exe without manually updating as abov...
Wait for all promises to resolve
So I have a situation where I have multiple promise chains of an unknown length. I want some action to run when all the CHAINS have been processed. Is that even possible? Here is an example:
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What is the best project structure for a Python application? [closed]
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Oh, I love this trick and am using it now. I want to put the shared module in another directory, and I do not want to install module system-wide, nor do I want to ask people to modify PYTHONPATH manually. Unless people propose something better, I think this is ac...
HTTP status code for a partial successful request
... with a very similar issue. In this case, I returned a
207 Multi-Status
Now, this isn't strict HTTP, it's part of the WebDAV extension, so if you don't have control over the client too, then this isn't good for you. If you do, you could do something like so:
<?xml version="1.0" encoding="u...
Evaluating a mathematical expression in a string
... stack.get()
if func not in safe:
raise TypeError("Function %r now allowed"%func)
stack.put(func(*args))
def LOAD_CONST(context, arg):
cons = arg[0]+arg[1]*256
stack.put(context['code'].co_consts[cons])
def LOAD_NAME(context, arg):
name_num = arg[0]+arg[1]*256
name ...