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Differences between cookies and sessions?
...fier can be passed in the URL or saved into a session cookie.
Most modern sites use the second approach, saving the identifier in a Cookie instead of passing it in a URL (which poses a security risk). You are probably using this approach without knowing it, and by deleting the cookies you effective...
What is the difference between id and class in CSS, and when should I use them? [duplicate]
... when you want to consistently style multiple elements throughout the page/site. Classes are useful when you have, or possibly will have in the future, more than one element that shares the same style. An example may be a div of "comments" or a certain list style to use for related links.
Addition...
How do I access the host machine from the guest machine? [closed]
.... Add a line like this:
192.168.78.1 myrubyapp
Now you can access the site in IE at the address http://myrubyapp:3000
If you use virtual hosts under Apache you'll need this to provide the correct server name.
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How to load up CSS files using Javascript?
...el = 'stylesheet';
link.type = 'text/css';
link.href = 'http://website.com/css/stylesheet.css';
link.media = 'all';
head.appendChild(link);
}
This example checks if the CSS was already added so it adds it only once.
Put that code into a javascript file, have the end-user simply i...
How to use dashes in HTML-5 data-* attributes in ASP.NET MVC
...ore control over the a tag, which is sometimes useful in heavily AJAXified sites.
HTH
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What's the best way to cancel event propagation between nested ng-click calls?
...ere's an example. Let's say I want to have an image overlay like a lot of sites. So when you click a thumbnail, a black overlay appears over your whole window, and a larger version of the image is centered in it. Clicking the black overlay dismisses it; clicking the image will call a function tha...
List all sequences in a Postgres db 8.1 with SQL
... Cool. And it looks like if I pick the "active" sorting method, the site just remembers the setting right away (here I was digging around in preferences to find a place to set it as default to no avail). Hm, now if only we had a "asker-accepted answer doesn't automatically trump everything el...
Authentication issue when debugging in VS2013 - iis express
...hentication. These settings control what authentication mechanisms the web sites are allowed to use.
– chiccodoro
Feb 11 '14 at 16:22
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How to calculate the time interval between two time strings
...
This site says to try:
import datetime as dt
start="09:35:23"
end="10:23:00"
start_dt = dt.datetime.strptime(start, '%H:%M:%S')
end_dt = dt.datetime.strptime(end, '%H:%M:%S')
diff = (end_dt - start_dt)
diff.seconds/60
This fo...
Convert Data URI to File then append to FormData
...o re-implement an HTML5 image uploader like the one on the Mozilla Hacks site, but that works with WebKit browsers. Part of the task is to extract an image file from the canvas object and append it to a FormData object for upload.
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