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Ruby/Rails: converting a Date to a UNIX timestamp
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354
The code date.to_time.to_i should work fine. The Rails console session below shows an example...
How to quit scala 2.11.0 REPL?
In the last version of scala (2.10.3) REPL, I can type exit to quit from REPL. However, in Scala 2.11.0 this doesn't work.
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json_encode() escaping forward slashes
...SLASHES flag.
!important read before: https://stackoverflow.com/a/10210367/367456 (know what you're dealing with - know your enemy)
json_encode($str, JSON_UNESCAPED_SLASHES);
If you don't have PHP 5.4 at hand, pick one of the many existing functions and modify them to your needs, e.g. http:/...
How to create a static library with g++?
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3 Answers
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Active
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What is the difference between LL and LR parsing?
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GEOCHET
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answered Jul 26 '11 at 2:21
templatetypedeftem...
Knight's Shortest Path on Chessboard
...e moves are disconnected (value=0), the sparse matrix would be like:
(a1,b3)=1,
(a1,c2)=1,
.....
And the shortest path of two points in a graph can be found using http://en.wikipedia.org/wiki/Dijkstra's_algorithm
Pseudo-code from wikipedia-page:
function Dijkstra(Graph, source):
for each v...
How to vertically center a div for all browsers?
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1396
Below is the best all-around solution I could build to vertically and horizontally center a fi...
Minimizing NExpectation for a custom distribution in Mathematica
..., s, Log[x]]/x;
If we plot pdf2 it looks exactly as your Plot
Plot[pdf2[3.77, 1.34, -2.65, 0.40, x], {x, 0, .3}]
Now to the expected value. If I understand it correctly we have to integrate x * pdf[x] from -inf to +inf for a normal expected value.
x * pdf[x] looks like
Plot[pdf2[3.77, 1.34...