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Which is the fastest algorithm to find prime numbers?
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If it has to be really fast you can include a list of primes:
http://www.bigprimes.net/archive/prime/
If you just have to know if a certain number is a prime number, there are various prime tests listed on wikipedia. They are probably the fastest method to determine if large numbers are prime...
How do I get the current absolute URL in Ruby on Rails?
... to change host name but keep everything else. I found that url_for(host: 'www.newdomain.com') worked the best for me as a solution to the problem. IMO, its a more robust solution since its the same across all versions of rails.
– PeppyHeppy
Dec 28 '12 at 7:06
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Save image from URL by paperclip
...cture = open(url)
end
end
Then simply :
user.picture_from_url "http://www.google.com/images/logos/ps_logo2.png"
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SET NAMES utf8 in MySQL?
...nections (many are, depending on your location and platform.)
Read http://www.joelonsoftware.com/articles/Unicode.html in case you aren't aware how Unicode works.
Read Whether to use "SET NAMES" to see SET NAMES alternatives and what exactly is it about.
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How to change a Git remote on Heroku
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22
How to disable HTML links
...doesn't seem to play nice. This example works:
<a id="a1" href="http://www.google.com">Google 1</a>
<a id="a2" href="http://www.google.com">Google 2</a>
$('#a1').attr('disabled', 'disabled');
$(document).on('click', 'a', function(e) {
if ($(this).attr('disabled') == 'd...
Which Eclipse version should I use for an Android app?
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If you need to install or update Eclipse, you can download it from http://www.eclipse.org/downloads/. The "Eclipse Classic" version is recommended. Otherwise, a Java or RCP version of Eclipse is recommended.
April 2014 Updated
Eclipse Indigo (Version 3.7.2) or higher is required. I'll suggest...
How do you read CSS rule values with JavaScript?
...t;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<style>
div#a { }
div#b, div#c { }
</style>
<scri...
Proper way to use AJAX Post in jquery to pass model from strongly typed MVC3 view
...n simply use for your data
data: $('#formId').serialize()
see http://www.ryancoughlin.com/2009/05/04/how-to-use-jquery-to-serialize-ajax-forms/ for details, the syntax is pretty basic.
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How SID is different from Service name in Oracle tnsnames.ora
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Please see: http://www.sap-img.com/oracle-database/finding-oracle-sid-of-a-database.htm
What is the difference between Oracle
SIDs and Oracle SERVICE NAMES. One
config tool looks for SERVICE NAME and
then the next looks for SIDs! What...