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Pairs from single list
...e=2):
it = iter(t)
return izip(*[it]*size)
When you want to pair all elements you obviously might need a fillvalue:
from itertools import izip_longest
def blockwise(t, size=2, fillvalue=None):
it = iter(t)
return izip_longest(*[it]*size, fillvalue=fillvalue)
...
What is Normalisation (or Normalization)?
...
Normalization is basically to design a database schema such that duplicate and redundant data is avoided. If some piece of data is duplicated several places in the database, there is the risk that it is updated in one place but not the other, lead...
How to delete files older than X hours
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Using --mmin +X returns all files with my find. My fault for not checking this first, but this command just deleted most of my home directory. For me, --mmin -X is the correct argument.
– brandones
Oct 16 '13 a...
Why do variable names often start with the letter 'm'? [duplicate]
...he Android tutorials such as the Notepad tutorial , I noticed that almost all variables are named starting with the letter 'm'. What convention is this, and where does it originate from?
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Get the POST request body from HttpServletRequest
... that we cannot read the request body again as getReader has already been called.
– Nikhil Sahu
Jan 6 '17 at 16:08
1
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How do you calculate log base 2 in Java for integers?
...ting-point to help with integer arithmetics, you have to be careful.
I usually try to avoid FP calculations whenever possible.
Floating-point operations are not exact. You can never know for sure what will (int)(Math.log(65536)/Math.log(2)) evaluate to. For example, Math.ceil(Math.log(1<<29...
Why is address zero used for the null pointer?
...emory, because it means freeing the pointer again isn't dangerous; when I call malloc it returns a pointer with the value zero if it can't get me memory; I use if (p != 0) all the time to make sure passed pointers are valid, etc.
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Very slow compile times on Visual Studio 2005
...t half-way down the page):
In decreasing order of speedup:
Install Microsoft hotfix 935225.
Install Microsoft hotfix 947315.
Use a true multicore processor (ie. an Intel Core Duo 2; not a Pentium 4 HT).
Use 3 parallel builds. In Visual Studio 2005, you will find the option in Tool...
Is there a way to select sibling nodes?
...lways is inspiring. I dug further. This is how jQuery gets siblings essentially:
function getChildren(n, skipMe){
var r = [];
for ( ; n; n = n.nextSibling )
if ( n.nodeType == 1 && n != skipMe)
r.push( n );
return r;
};
function getSiblings(n) {
r...
How to remove files from git staging area?
... which I think added too many files to the staging area. How can I delete all the files from the staging area?
14 Answers
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