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Finding all possible combinations of numbers to reach a given sum
...])=15
This type of algorithms are very well explained in the following Standford's Abstract Programming lecture - this video is very recommendable to understand how recursion works to generate permutations of solutions.
Edit
The above as a generator function, making it a bit more useful. Require...
Can CSS force a line break after each word in an element?
... even a line-break after a single letter. Works with Chrome/FF/Opera/IE7+ (and probably even IE6 since it's supporting word-spacing as well).
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Get list of databases from SQL Server
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To expand on what @ChrisDiver said: SELECT name FROM sys.databases is the preferred approach now, rather than dbo.sysdatabases, which has been deprecated for a decade now.
– Micah
Feb 3 '16 a...
How to disable right-click context-menu in JavaScript [duplicate]
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Capture the onContextMenu event, and return false in the event handler.
You can also capture the click event and check which mouse button fired the event with event.button, in some browsers anyway.
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How to convert a factor to integer\numeric without loss of information?
...actor:
In particular, as.numeric applied to
a factor is meaningless, and may
happen by implicit coercion. To
transform a factor f to
approximately its original numeric
values, as.numeric(levels(f))[f] is
recommended and slightly more
efficient than
as.numeric(as.character(f)).
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While loop to test if a file exists in bash
... using a Bash (or related) shell by typing 'echo $SHELL'. I think that CSH and TCSH use a slightly different semantic for this loop.
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Callback functions in Java
... @Omar, agreed. I've come back to Java after a long stint with C# and really miss lambdas/delegates. Come on Java!
– Drew Noakes
May 2 '11 at 14:56
4
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How to check if any flags of a flag combination are set?
...f you want to know if letter has any of the letters in AB you must use the AND & operator. Something like:
if ((letter & Letters.AB) != 0)
{
// Some flag (A,B or both) is enabled
}
else
{
// None of them are enabled
}
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Google Chrome Printing Page Breaks
...ke Thanks for answering the problem for me. Not sure why a br doesn't work and a div does, but nonetheless an easy change.
– Jeff Davis
Mar 30 '11 at 21:37
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Python serialization - Why pickle?
...le. Then, in another script, you could load from this file into a variable and the dictionary would be recreated:
with open('filename','rb') as f:
var = pickle.load(f)
Another use for pickling is if you need to transmit this dictionary over a network (perhaps with sockets or something.) You f...