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Iterate an iterator by chunks (of n) in Python? [duplicate]
...y_list[i:i + chunk_size] for i in range(0, len(my_list), chunk_size)]
Finally, a solution that works on general iterators an behaves as desired is
def grouper(n, iterable):
it = iter(iterable)
while True:
chunk = tuple(itertools.islice(it, n))
if not chunk:
return...
Media query to detect if device is touchscreen
...devices, you can simple use:
if(window.TouchEvent) {
//.....
}
Especially for Ipad:
if(window.Touch) {
//....
}
But, these do not work on Android.
Modernizr gives feature detection abilities, and detecting features is
a good way to code, rather than coding on basis of browsers.
...
multiprocessing.Pool: When to use apply, apply_async or map?
...
Back in the old days of Python, to call a function with arbitrary arguments, you would use apply:
apply(f,args,kwargs)
apply still exists in Python2.7 though not in Python3, and is generally not used anymore. Nowadays,
f(*args,**kwargs)
is preferred. The...
How accurately should I store latitude and longitude?
...
Actually, equator is best case. One latitude and one longitude degree are the same size at the equator (69 miles), but one degree of longitude shrinks to zero as it approaches either of the poles. Here's a very nice explanation: ...
How to detect user inactivity in Android
...
Selects Session Timeout to be 5 mins.
Does some operations on the app. (all in foreground)
Now User bring Myapp to background and starts some other app.
----> Count down timer starts and logs out user after 5 mins
OR user turns the screen OFF.
----> Count down timer starts and logs ou...
Generating a random & unique 8 character string using MySQL
... us to concentrate on the uniqueness first. Non-random uniqueness can trivially be achieved with AUTO_INCREMENT. So using a uniqueness-preserving, pseudo-random transformation would be fine:
Hash has been suggested by @paul
AES-encrypt fits also
But there is a nice one: RAND(N) itself!
A sequenc...
What are the main performance differences between varchar and nvarchar SQL Server data types?
I'm working on a database for a small web app at my school using SQL Server 2005 .
I see a couple of schools of thought on the issue of varchar vs nvarchar :
...
nginx - client_max_body_size has no effect
...NGINX large uploads are successfully working on hosted WordPress sites, finally (as per suggestions from nembleton & rjha94)
I thought it might be helpful for someone, if I added a little clarification to their suggestions. For starters, please be certain you have included your increased uploa...
Changing the case of a string in Eclipse
... You can use the hot key CTRL+SHIFT+L to bring up the popup that contains all the available hot-keys
– Ken Chan
Oct 4 '12 at 18:57
...
Is there a way to measure how sorted a list is?
...er according to some ordering < on the set of T's.
From Wikipedia:
Formally, let A(1), A(2), ..., A(n) be a sequence of n numbers.If i < j and A(i) > A(j), then the pair (i,j) is called an inversion of A.
The inversion number of a sequence is one common measure of its sortedness.Formally, ...