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How to write the Fibonacci Sequence?
...ne is pretty easy to implement and very, very fast to compute, in Python:
from math import sqrt
def F(n):
return ((1+sqrt(5))**n-(1-sqrt(5))**n)/(2**n*sqrt(5))
An other way to do it is following the definition (from wikipedia):
The first number of the sequence is 0,
the second number is...
How to get week number in Python?
...tle late. But on my machine, date(2010, 1, 1).isocalendar()[1] returns 53. From the docs: "For example, 2004 begins on a Thursday, so the first week of ISO year 2004 begins on Monday, 29 Dec 2003 and ends on Sunday, 4 Jan 2004, so that date(2003, 12, 29).isocalendar() == (2004, 1, 1) and date(2004,...
Deserializing JSON data to C# using JSON.NET
...smodifiedby property.
Try excluding the accountstatusmodifiedby property from the serialization and see if that helps. If it does, you may need to represent that property differently.
Documentation: Serializing and Deserializing JSON with Json.NET
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Sending websocket ping/pong frame from browser
...
Ping is meant to be sent only from server to client, and browser should answer as soon as possible with Pong OpCode, automatically. So you have not to worry about that on higher level.
Although that not all browsers support standard as they suppose to, t...
Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
...ed clique of n + 1 nodes. Even though there's clearly just one simple path from A to B, a naïve DFS will waste O(n!) time uselessly exploring the clique. Similar examples (one solution, DFS takes exponential time) can be found among DAGs, too.
– Ilmari Karonen
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How do I prevent site scraping? [closed]
...s to know how these scrapers work, and
, by extension, what prevents them from working well.
There's various types of scraper, and each works differently:
Spiders, such as Google's bot or website copiers like HTtrack, which recursively follow links to other pages in order to get data. These are ...
How serious is this new ASP.NET security vulnerability and how can I workaround it?
...tionally add a random time sleep in the error page to prevent the attacker from timing the responses for added attack information.
In web.config
<configuration>
<location allowOverride="false">
<system.web>
<customErrors mode="On" defaultRedirect="~/error.html" />
...
Checking for a null int value from a Java ResultSet
In Java I'm trying to test for a null value, from a ResultSet, where the column is being cast to a primitive int type.
1...
Converting string from snake_case to CamelCase in Ruby
I am trying to convert a name from snake case to camel case. Are there any built-in methods?
10 Answers
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Enum String Name from Value
... member with a simple cast, and then call ToString():
int value = GetValueFromDb();
var enumDisplayStatus = (EnumDisplayStatus)value;
string stringValue = enumDisplayStatus.ToString();
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