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Understanding generators in Python
...
There is no Java equivalent.
Here is a bit of a contrived example:
#! /usr/bin/python
def mygen(n):
x = 0
while x < n:
x = x + 1
if x % 3 == 0:
yield x
for a in mygen(100):
print a
There is a loop in the generator th...
Delete local Git branches after deleting them on the remote repo
...op|staging)" | xargs -n 1 git branch -d
Make this an alias
Since it's a bit long, you might want to add an alias to your .zshrc or .bashrc. Mine is called gbpurge (for git branches purge):
alias gbpurge='git branch --merged | grep -Ev "(\*|master|develop|staging)" | xargs -n 1 git branch -d'
T...
Spring RestTemplate - how to enable full debugging/logging of requests/responses?
..., but conveniently avoids the issue of logging the response, which takes a bit more work. Paul Sabou provides a solution that seems realistic, but doesn't provide enough details to actually implement (and it didn't work at all for me). Sofiene got the logging but with a critical problem: the respons...
What's the best way to iterate over two or more containers simultaneously
...ange for the indices. Since the implementation – though simple – is a bit too long to post it here, you can find an implementation on GitHub.
This code is as efficient as using a manual, classical for loop.
If this pattern occurs often in your data, consider using another pattern which zips t...
When do you use POST and when do you use GET?
... to provide the PUT and DELETE calls also.
But, even if you are not following RESTful principles, it can be useful to think in terms of using GET for retrieving / viewing information and POST for creating / editing information.
You should never use GET for an operation which alters data. If a se...
Anonymous recursive PHP functions
... f x = f (Y f) x.
Since PHP doesn't automatically curry functions, it's a bit of a hack to make fix work, but I think it's interesting.
function fix( $func )
{
return function() use ( $func )
{
$args = func_get_args();
array_unshift( $args, fix($func) );
return call...
Unix command-line JSON parser? [closed]
... string which encodes further JSON. Which also works, but requires just a bit of munging.
– Dave Dopson
Feb 25 '14 at 20:11
...
Fastest way to flatten / un-flatten nested JSON objects
...o flatten and un-flatten complex/nested JSON objects. It works, but it's a bit slow (triggers the 'long script' warning).
1...
How to convert a std::string to const char* or char*?
...ACK WHERE MAXIMUM SIZE OF x IS KNOWN TO BE COMPILE-TIME CONSTANT "N"
// (a bit dangerous, as "known" things are sometimes wrong and often become wrong)
char y[N + 1];
strcpy(y, x.c_str());
// USING STACK WHERE UNEXPECTEDLY LONG x IS TRUNCATED (e.g. Hello\0->Hel\0)
char y[N + 1];
strncpy(y, x.c_s...
asynchronous vs non-blocking
...t when is a good time to retry.
But asynchronous sockets (as supported by Windows sockets), or the asynchronous IO pattern used in .NET, are more convenient. You call a method to start an operation, and the framework calls you back when it's done. Even here, there are basic differences. Asynchronou...