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Number of days between two NSDates [duplicate]
... current time zone, perfect for an app that shows information about places all around the world.
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Add column with constant value to pandas dataframe [duplicate]
...ods to gain some intuition for alignment works with objects that have partially, totally, and not-aligned-all aligned indices. For example here's how DataFrame.align() works with partially aligned indices:
In [7]: from pandas import DataFrame
In [8]: from numpy.random import randint
In [9]: df = ...
How to get the current time as datetime
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@YestayMuratov This handy webpage tells has all possible ways of formatting a date using the NSDateFormatter in Swift :) codingexplorer.com/…
– Max
Jun 20 '15 at 8:09
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Catch multiple exceptions at once?
...ore lines, try to imagine if you are dealing with file IO for example, and all you want to do is catch those exceptions and do some log messaging, but only those you expect coming from your file IO methods. Then you often have to deal with a larger number (about 5 or more) different types of excepti...
input type=“submit” Vs button tag are they interchangeable?
...an INPUT element whose type is set to "image", but the BUTTON element type allows content.
So for functionality only they're interchangeable!
(Don't forget, type="submit" is the default with button, so leave it off!)
shar...
How is this fibonacci-function memoized?
...nacci definition, fib n = fib (n-1) + fib (n-2), the function itself gets called, twice from the top, causing the exponential explosion. But with that trick, we set out a list for the interim results, and go "through the list":
fib n = (xs!!(n-1)) + (xs!!(n-2)) where xs = 0:1:map fib [2..]
The tr...
Possible reason for NGINX 499 error codes
... connection before the server answered the request. In my experience is usually caused by client side timeout. As I know it's an Nginx specific error code.
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jQuery - Trigger event when an element is removed from the DOM
... couldn't find a mention of this. Would like to see whether this is officially supported / any caveats about using it...
– josh
Aug 1 '13 at 17:00
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What's a good rate limiting algorithm?
...sages
per = 8.0; // unit: seconds
allowance = rate; // unit: messages
last_check = now(); // floating-point, e.g. usec accuracy. Unit: seconds
when (message_received):
current = now();
time_passed = current - last_check;
last_check = current;
allowance += time_passed * (rate / per);
if (...
Get Unix Epoch Time in Swift
...alSince1970)
let preciseMilliseconds = Int(Date().timeIntervalSince1970 * 1_000)
let preciseMicroseconds = Int(Date().timeIntervalSince1970 * 1_000_000) // most likely precise
Unfortunately, however, in the year 2038, 32-bit numbers won't be usable for the Unix timestamp and they'll have to be 64-...