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What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
... properly).
Use the second option if you need to ensure data consistency, and each thread needs to have an up-to-date view of the map. Use the first if performance is critical, and each thread only inserts data to the map, with reads happening less frequently.
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How to preventDefault on anchor tags?
...ATE: I've since changed my mind on this solution. After more development and time spent working on this, I believe a better solution to this problem is to do the following:
<a ng-click="myFunction()">Click Here</a>
And then update your css to have an extra rule:
a[ng-click]{
cu...
Retina displays, high-res background images
...wer, here is the retina detection query I tend to use:
@media
only screen and (-webkit-min-device-pixel-ratio: 2),
only screen and ( min--moz-device-pixel-ratio: 2),
only screen and ( -o-min-device-pixel-ratio: 2/1),
only screen and ( min-device-pixel-ratio: 2),
only screen and ( ...
So, JSONP or CORS? [closed]
...
This is a pretty broad question, and could warrant a wiki unto itself. There is also quite a bit on google regarding the two, but I think I can hit a few key points.
If you need a read-only ajax interface to your servers and you need to support IE<=9...
How can I change the file type association of an existing file in WebStorm?
I accidentally created a file with no extension and I chose the wrong file type association. Text Document I think. I renamed it to have the .js extension which is what I wanted, but now it's stuck without any syntax highlighting. WebStorm doesn't treat it as a javascript file. I can't find anyw...
Replacing H1 text with a logo image: best method for SEO and accessibility?
...o.png" alt="Stack Overflow" />
</a>
</h1>
title in href and img to h1 is very, very important!
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Tuples( or arrays ) as Dictionary keys in C#
...alues to one string. I tried using arrays as keys, but that did not work, and I don't know what else to do. At this point I am considering making a Dictionary of Dictionaries of Dictionaries, but that would probably not be very pretty to look at, though it is how I would do it in javascript.
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How does one write code that best utilizes the CPU cache to improve performance?
...aiting for a memory request to be fulfilled (avoiding the memory latency), and as a second effect, possibly to reduce the overall amount of data that needs to be transfered (preserving memory bandwidth).
Techniques for avoiding suffering from memory fetch latency is typically the first thing to con...
How are ssl certificates verified?
...eps needed to securely verify a ssl certificate? My (very limited) understanding is that when you visit an https site, the server sends a certificate to the client (the browser) and the browser gets the certificate's issuer information from that certificate, then uses that to contact the issuerer, ...
SQL Server Installation - What is the Installation Media Folder?
...8. I have installed .NET framework 3.5.
Then I got folder SQL Server 2008 and performed following steps-
10 Answers
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