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In what cases will HTTP_REFERER be empty
...the window/tab.
clicked a link in an external application.
switched from a https URL to a http URL.
switched from a https URL to a different https URL.
has security software installed (antivirus/firewall/etc) which strips the referrer from all requests.
is behind a proxy which strips the referrer fr...
Change color of PNG image via CSS?
...upported in over 90% of browsers according to the following CanIUse table: https://caniuse.com/#feat=css-filters
You can change an image to grayscale, sepia and lot more (look at the example).
So you can now change the color of a PNG file with filters.
body {
background-color:#03030a;
...
Changed GitHub password, no longer able to push back to the remote
...e or remote URL, you can take a look at the following Git documentation:-
https://help.github.com/articles/setting-your-username-in-git/
https://help.github.com/articles/changing-a-remote-s-url/
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How can I generate a diff for a single file between two branches in github
...ose tags actually point to commits, the Url format would be something like
https://github.com/{user}/{repository}/compare/{from-tag}...{until-tag}
As an example, https://github.com/libgit2/libgit2sharp/compare/v0.9.0...v0.9.5 shows the diff between two versions of the LibGit2Sharp project. This diff...
Simple Digit Recognition OCR in OpenCV-Python
...
Hello, could we load a trained net to use?
– yode
Jul 11 '18 at 6:47
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How and when to use ‘async’ and ‘await’
...context of the original thread that it was running on. For example, in ASP.NET you have an HttpContext which is tied to a thread when a request comes in. This context contains things specific to the original Http request such as the original Request object which has things like language, IP address,...
Should 'using' directives be inside or outside the namespace?
...rective. Using directives are purely a C#ism, and they have no meaning to .NET itself. (Not true for using statements but those are something quite different.)" groups.google.com/group/wpf-disciples/msg/781738deb0a15c46
– Chris McKee
Aug 24 '11 at 21:52
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Are there disadvantages to using a generic varchar(255) for all text-based fields?
...s before the @, up to 255 bytes after. Never more, lest you break the Internet.
North American Phone Numbers are never more than 10 digits (excluding the country code).
Computers running (recent versions of) Windows cannot have computer names longer than 63 bytes, though more than 15 is not recomme...
Check if a JavaScript string is a URL
...gexp from Devshed:
function validURL(str) {
var pattern = new RegExp('^(https?:\\/\\/)?'+ // protocol
'((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|'+ // domain name
'((\\d{1,3}\\.){3}\\d{1,3}))'+ // OR ip (v4) address
'(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*'+ // port and path
'(\\?[;...
RegEx match open tags except XHTML self-contained tags
...ations in mainstream programming languages are more powerful. As noulakaz.net/weblog/2007/03/18/… describes, so-called "regular expressions" can check for prime numbers in unary, which is certainly something that a regular expression from CS theory can't accomplish.
– Adam M...