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How does LMAX's disruptor pattern work?
... related to reading from the disruptor) and some information on handling multiple producers available.
The simplest description of the Disruptor is: It is a way of sending messages between threads in the most efficient manner possible. It can be used as an alternative to a queue, but it also shares...
CSS: 100% width or height while keeping aspect ratio?
...sing background-size.
It is supposed to work in modern browsers (IE9+).
<div id="container" style="background-image:url(myimage.png)">
</div>
And the style:
#container
{
width: 100px; /*or 70%, or what you want*/
height: 200px; /*or 70%, or what you want*/
background-size: co...
Can't start site in IIS (use by another process)
...t may be a chat application on your PC like Skype.
First, change the default web site port which was 80 to some unused port (e.g. 8087). To achieve this right click the application and then click on 'Edit Binding'.
After this port change restart again.
Now you can identify which process is blo...
Should I inherit from std::exception?
... want to derive from one of the sub-classes of std::exception declared in <stdexcept> header.
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How do you hide the Address bar in Google Chrome for Chrome Apps?
... run /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --app=<url>
– Christopher Swasey
Oct 29 '14 at 15:34
1
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Why dict.get(key) instead of dict[key]?
...
It allows you to provide a default value if the key is missing:
dictionary.get("bogus", default_value)
returns default_value (whatever you choose it to be), whereas
dictionary["bogus"]
would raise a KeyError.
If omitted, default_value is None, such...
Finding all possible permutations of a given string in python
...ements in the iterable.
If r is not specified or is None, then r defaults to the length of the
iterable and all possible full-length permutations are generated.
Permutations are emitted in lexicographic sort order. So, if the input
iterable is sorted, the permutation tuples will be pro...
Jackson Vs. Gson [closed]
...e same 2 libraries. As I'm using Spring 3 (that adopts Jackson in its default Json view 'JacksonJsonView') it was more natural for me to do the same. The 2 lib are pretty much the same... at the end they simply map to a json file! :)
Anyway as you said Jackson has a + in performance and that's ver...
How to use protractor to check if an element is visible?
...ose elements that are visible in this way as well. Eg. given a page with multiple items, where only some are visible, you can use:
this.visibileIcons = $$('i.icon:not(.ng-hide)');
This will return you all visible i.icons
...
Fastest way to determine if record exists
...mething exists and therefore should be (and is) the best option. It will halt on the first row that matches so it does not require a TOP clause and it does not actually select any data so there is no overhead in size of columns. You can safely use SELECT * here - no different than SELECT 1, SELECT N...