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How does the Amazon Recommendation feature work?
...nearest neighbor methods, and neural networks. Here are some papers by the winning team:
R. Bell, Y. Koren, C. Volinsky, "The BellKor 2008 Solution to the Netflix Prize", (2008).
A. Töscher, M. Jahrer, “The BigChaos Solution to the Netflix Prize 2008", (2008).
A. Töscher, M. Jahrer, R. Legens...
What is the difference between Python's list methods append and extend?
..., since append can be used to achieve the same outcome as extend. The following functions do the same thing:
def append(alist, iterable):
for item in iterable:
alist.append(item)
def extend(alist, iterable):
alist.extend(iterable)
So let's time them:
import timeit
>>> ...
How do I set a cookie on HttpClient's HttpRequestMessage
...oded");
httpRequestMessage.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36");
httpRequestMessage.Headers.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,imag...
Should I use #define, enum or const?
...disadvantages of a single approach. I work in embedded systems so the following solution is based on the fact that integer and bitwise operators are fast, low memory & low in flash usage.
Place the enum in a namespace to prevent the constants from polluting the global namespace.
namespace Reco...
What's the difference between Perl's backticks, system, and exec?
...se this tasks.
There is IPC::Open2 and IPC::Open3 and IPC::Run, as well as
Win32::Process::Create if you are on windows.
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What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
...Job [console]::WriteLine works but Write-Host will result in an error: The Win32 internal error "The handle is invalid" 0x6 occurred while setting character attributes for the console output buffer. Don't ask me why.
– Gil Roitto
Nov 3 '17 at 12:19
...
The provider is not compatible with the version of Oracle client
....dll files were located in various directories in my oracle home. A simple windows search turned them up very quickly.
– Pandincus
Dec 28 '10 at 18:23
10
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Is it worth hashing passwords on the client side
...order to make sure, that such a replay attack cannot work, usually, by allowing the client to select a bunch of random bits, which are hashed along with the password, and also submitted in the clear to the server.
On the server:
generate a few bits of random
send these bits (in clear text) to th...
Why is setTimeout(fn, 0) sometimes useful?
...ated, and
Your code to set the selected index
Your code was consistently winning this race and attempting to set drop-down selection before the browser was ready, meaning that the bug would appear.
This race existed because JavaScript has a single thread of execution that is shared with page rend...
Performance surprise with “as” and nullable types
.... While the IL code for the new syntax is indeed 1 byte smaller, it mostly wins big by making zero calls (vs. two) and avoiding the unbox operation altogether when possible.
// static void test1(Object o, ref int y)
// {
// int? x = o as int?;
// if (x.HasValue)
// y = x.Value;
// }...