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Fast permutation -> number -> permutation mapping algorithms
...d k the index of the digit. (I will always count digits from the right and starting at index 0 for the rightmost digit. Likewise when I talk about the 'first' digit I mean the rightmost.)
The reason why the weights for digits follow this pattern is that the highest number that can be represented by...
Why extend the Android Application class?
...Access to variables across the Application,
You can use the Application to start certain things like analytics
etc. since the application class is started before Activitys or
Servicess are being run,
There is an overridden method called onConfigurationChanged() that is
triggered when the application...
Difference between app.all('*') and app.use('/')
...js
app.all(path, [callback...], callback)
app.use only sees whether url starts with the specified path
app.use( "/product" , mymiddleware);
// will match /product
// will match /product/cool
// will match /product/foo
app.all will match complete path
app.all( "/product" , handler);
// will ma...
Cron job every three days
...d 31 days.) The date('j') % 3 has a similar problem in that the pattern restarts every year, and years don't have a number of days divisible by 3.
– cjm
Apr 19 '15 at 22:28
8
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Git commit with no commit message
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@amn, I also just started wondering about all those tens of thousands of well-written commit messages that I have written that will never ever be read by anyone. For me now the value of this habit is that it forces me to look through the chang...
How do I speed up the gwt compiler?
We're starting to make heavier use of GWT in our projects, and the performance of the GWT compiler is becoming increasingly annoying.
...
Show current state of Jenkins build on GitHub repo
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Sadly, it seems that GitHub started caching these images on some image hosting service, and they are being displayed incorrectly now.
– axel22
Feb 12 '14 at 8:59
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SQL Query to concatenate column values from multiple rows in Oracle
...a a, table_b b
WHERE a.pid = b.pid(+)
)
)
START WITH rnum = 1
CONNECT BY PRIOR rnum = rnum - 1 AND PRIOR pid = pid
GROUP BY pid
ORDER BY pid;
There may also be instances where keys and values are all contained in one table. The following query can be used where the...
Why does Google +1 record my mouse movements? [closed]
....width * screen.width + screen.height) * 1000000, and c is a variable that starts out as 1.
All of this is wrapped in the scope of an anonymous function, which itself is immediately evaluated to return a function that is assigned to a property named "random". That returned function looks something ...
How to create the most compact mapping n → isprime(n) up to a limit N?
...every odd number with one bit e.g. for the given range of numbers (1, 10], starts at 3: 1110
31 Answers
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