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CSS: 100% width or height while keeping aspect ratio?
...osition: center;
background-repeat: no-repeat;
}
The reference: http://www.w3schools.com/cssref/css3_pr_background-size.asp
And the demo: http://www.w3schools.com/cssref/playit.asp?filename=playcss_background-size
shar...
How to scale Docker containers in production
...ng container clusters.
Update 20
Docker recently bought Tutum:
https://www.docker.com/tutum
Update 21
Package manager for applications deployed on Kubernetes.
http://helm.sh/
Update 22
Vamp is an open source and self-hosted platform for managing (micro)service oriented architectures that re...
Finding all possible combinations of numbers to reach a given sum
...
The solution of this problem has been given a million times on the Internet. The problem is called The coin changing problem. One can find solutions at http://rosettacode.org/wiki/Count_the_coins and mathematical model of it at http://jaqm.ro/issues/volume-5,issue-2/pdfs/patterson_harmel.pdf (or ...
Ruby on Rails: How do you add add zeros in front of a number if it's under 10?
...
how about "%02d" % 9? see http://www.ruby-doc.org/core-2.0/String.html#method-i-25 and http://www.ruby-doc.org/core-2.0/Kernel.html#method-i-sprintf .
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How to validate IP address in Python? [duplicate]
...
Don't parse it. Just ask.
import socket
try:
socket.inet_aton(addr)
# legal
except socket.error:
# Not legal
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.Contains() on a list of custom class objects
...
If you are using .NET 3.5 or newer you can use LINQ extension methods to achieve a "contains" check with the Any extension method:
if(CartProducts.Any(prod => prod.ID == p.ID))
This will check for the existence of a product within CartPr...
Get final URL after curl is redirected
... curl -i http://google.com
HTTP/1.1 301 Moved Permanently
Location: http://www.google.com/
Content-Type: text/html; charset=UTF-8
Date: Sat, 19 Jun 2010 04:15:10 GMT
Expires: Mon, 19 Jul 2010 04:15:10 GMT
Cache-Control: public, max-age=2592000
Server: gws
Content-Length: 219
X-XSS-Protection: 1; mod...
How to send cookies in a post request with the Python Requests library?
...e across requests) you can do:
import requests
r1 = requests.post('http://www.yourapp.com/login')
r2 = requests.post('http://www.yourapp.com/somepage',cookies=r1.cookies)
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How to detect page zoom level in all modern browsers?
...known method
FF4+: media queries binary search (see below)
WebKit: https://www.chromestatus.com/feature/5737866978131968 (thanks to Teo in the comments)
WebKit: measure the preferred size of a div with -webkit-text-size-adjust:none.
WebKit: (broken since r72591) document.width / jQuery(document).wid...
how to detect search engine bots with php?
...e $_SERVER['HTTP_USER_AGENT'] for some of the strings listed here:
http://www.useragentstring.com/pages/useragentstring.php
Or more specifically for crawlers:
http://www.useragentstring.com/pages/useragentstring.php?typ=Crawler
If you want to -say- log the number of visits of most common search ...