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Best algorithm for detecting cycles in a directed graph [closed]
...s, I suspect that at some point you are going to sort them into a proposed order of execution.
If that's the case, then a topological sort implementation may in any case detect cycles. UNIX tsort certainly does. I think it is likely that it is therefore more efficient to detect cycles at the same t...
Generate random numbers following a normal distribution in C/C++
...h is the way I would go today.
C or older C++
Here are some solutions in order of ascending complexity:
Add 12 uniform random numbers from 0 to 1 and subtract 6. This will match mean and standard deviation of a normal variable. An obvious drawback is that the range is limited to ±6 – unlike a...
Counting the occurrences / frequency of array elements
... demo: http://jsfiddle.net/simevidas/bnACW/
Note
This changes the order of the original input array using Array.sort
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Set Matplotlib colorbar size to match graph
...ink, and other similar parameters cannot necessarily give the very precise order, which really bothers me. I believe that giving the colorbar its own axes might be a better solution to address all the issues that have been mentioned.
Code
import matplotlib.pyplot as plt
import numpy as np
fig=plt...
PHP - how to best determine if the current invocation is from CLI or web server?
...er, you'll get apache2handler. Hope this helps. I needed to use php-cgi in order to introduce $_GET variables: php-cgi myscript.php arg1=one arg2=two. Testing for not equal to apache2handler should be ok for apache.
– Sebastian
Jun 12 '13 at 1:01
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What is the best method of handling currency/money?
...in Rails console, send a call to the ActiveSupport's NumberHelper class in order to access the helper.
For example:
ActiveSupport::NumberHelper.number_to_currency(2_500_000.61, unit: '€', precision: 2, separator: ',', delimiter: '', format: "%n%u")
gives the following output
2500000,61€
Check ...
Add Variables to Tuple
...confusion between an element in parentheses. Plain parentheses are used in order of operations, so (7) is just 7. But (7,) is a one-element tuple where the element is 7. Likewise, 3 * ( 7+8) = 45, but 3 * (7+8,) = (15, 15, 15) -- does that make sense?
– Daniel
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What are the most useful Intellij IDEA keyboard shortcuts? [closed]
...Intellij IDEA keyboard shortcuts I find most useful (listed in roughly the order of usage for me):
The shortcut I use the most is Ctrl + B (Go to declaration), to see what a method does, where a variable is declared etc. This is almost always followed by Ctrl + Alt + Left to get back to where I was...
What exactly is Python multiprocessing Module's .join() Method Doing?
...od.
and
Note It is important to join() the process after terminating it in order to give the background machinery time to update the status of the object to reflect the termination.
This is a good example helped me understand it: here
One thing I noticed personally was my main process paused until t...
How to check iOS version?
...mVersion];
if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending) {
displayLinkSupported = TRUE;
}
If for whatever reason you decide that systemVersion is what you want, make sure to treat it as an string or you risk truncating the patch revision number (eg. 3.1.2 -&...