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Replacing NAs with latest non-NA value
In a data.frame (or data.table), I would like to "fill forward" NAs with the closest previous non-NA value. A simple example, using vectors (instead of a data.frame ) is the following:
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How to get the mouse position without events (without moving the mouse)?
...y) 2,000 x 2,000 <a> elements (so that the :hover pseudo-class will work in IE 6, see), each 1 pixel in size. Create a CSS :hover rule for those <a> elements that changes a property (let's say font-family). In your load handler, cycle through each of the 4 million <a> elements, che...
How to compare software version number using js? (only number)
...rts are not equal we know which version is smaller.
There are a few of important details to keep in mind:
How should the parts in each pair be compared? The question wants to compare numerically, but what if we have version strings that are not made up of just digits (e.g. "1.0a")?
What should ha...
Multiprocessing: How to use Pool.map on a function defined in a class?
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I also was annoyed by restrictions on what sort of functions pool.map could accept. I wrote the following to circumvent this. It appears to work, even for recursive use of parmap.
from multiprocessing import Process, Pipe
from itertools import izip
def spawn(f):
d...
Random / noise functions for GLSL
As the GPU driver vendors don't usually bother to implement noiseX in GLSL, I'm looking for a "graphics randomization swiss army knife" utility function set, preferably optimised to use within GPU shaders. I prefer GLSL, but code any language will do for me, I'm ok with translating it on my own ...
What is the most efficient way of finding all the factors of a number in Python?
Can someone explain to me an efficient way of finding all the factors of a number in Python (2.7)?
22 Answers
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Maven project version inheritance - do I have to specify the parent version?
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EDIT: Since Maven 3.5.0 there is a nice solution for this using ${revision} placeholder. See FrVaBe's answer for details. For previous Maven versions see my original answer below.
No, there isn't. You always have to specify parent's version. Fortunately, it is inherited a...
How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
...es to be directly initialized.)
This question discusses the uses left for a C array like int arr[20]; . On his answer , @James Kanze shows one of the last strongholds of C arrays, it's unique initialization characteristics:
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difference between variables inside and outside of __init__()
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That's not what python does for me. Lists/dicts/etc get shared between all instances if you don't create them in __init__().
– too much php
Oct 8 '09 at 11:43
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ASP.NET Web API - PUT & DELETE Verbs Not Allowed - IIS 8
...this. You need to jump through some hoops to get the PUT and DELETE verbs working correctly with IIS8. In fact if you install the release candidate of VS 2012 and create a new WEB API project you'll find that the sample PUT and DELETE methods return 404 errors out of the box.
To use the PUT and DEL...