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Deserialize JSON to ArrayList using Jackson
I have a Java class MyPojo that I am interested in deserializing from JSON. I have configured a special MixIn class, MyPojoDeMixIn , to assist me with the deserialization. MyPojo has only int and String instance variables combined with proper getters and setters. MyPojoDeMixIn looks somet...
find filenames NOT ending in specific extensions on Unix?
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Linux/OS X:
Starting from the current directory, recursively find all files ending in .dll or .exe
find . -type f | grep -P "\.dll$|\.exe$"
Starting from the current directory, recursively find all files that DON'T end in .dll or .exe
find . ...
What is private bytes, virtual bytes, working set?
...perfmon counter descriptions, here is the inside story about private bytes from "Private Bytes Performance Counter -- Beware!" on MSDN:
Q: When is a Private Byte not a Private Byte?
A: When it isn't resident.
The Private Bytes counter reports the commit charge of the process. That is to say, the am...
Way to go from recursion to iteration
I've used recursion quite a lot on my many years of programming to solve simple problems, but I'm fully aware that sometimes you need iteration due to memory/speed problems.
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jQuery Scroll to bottom of page/iframe
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scrollTop() returns the number of pixels that are hidden from view from the scrollable area, so giving it:
$(document).height()
will actually overshoot the bottom of the page. For the scroll to actually 'stop' at the bottom of the page, the current height of the browser window n...
What is the JavaScript convention for no operation?
...o compared these to the results of simply removing the function altogether from the loop. Unfortunately, Function.prototype did not perform well at all. calling an empty function was far superior in performance, even faster than calling the function with the simple 'if' test inside to return.
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I forgot the password I entered during postgres installation
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When connecting to postgres from command line, don't forget to add -h localhost as command line parameter. If not, postgres will try to connect using PEER authentication mode.
The below shows a reset of the password, a failed login with PEER authentica...
Static variables in JavaScript
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If you come from a class-based, statically typed object-oriented language (like Java, C++ or C#) I assume that you are trying to create a variable or method associated to a "type" but not to an instance.
An example using a "classical" a...
PhoneGap: Detect if running on desktop browser
...do the job for 98% of the cases.
/**
* Determine whether the file loaded from PhoneGap or not
*/
function isPhoneGap() {
return (window.cordova || window.PhoneGap || window.phonegap)
&& /^file:\/{3}[^\/]/i.test(window.location.href)
&& /ios|iphone|ipod|ipad|android/i...
Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
...ed clique of n + 1 nodes. Even though there's clearly just one simple path from A to B, a naïve DFS will waste O(n!) time uselessly exploring the clique. Similar examples (one solution, DFS takes exponential time) can be found among DAGs, too.
– Ilmari Karonen
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