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Generate list of all possible permutations of a string
...nput was sorted and finding indexes (k0 and l0) itself, based on where the ordering is maintained. Sorting an input like "54321" -> "12345" would allow this algorithm to find all of the expected permutations. But since it does a good amount of extra work to re-find those indexes for every permuta...
How to sum a variable by group
... Is there anyway of maintaining an ID column? Say the categories are ordered and the ID column is 1:nrow(df), is it possible to keep the starting position of each category after aggregating? So the ID column would end up as, for example, 1, 3, 4, 7 after collapsing with aggregate. In my case ...
Comparing HTTP and FTP for transferring files
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COALESCE Function in TSQL
...type, they get implicitly cast to an appropriate data-type using data-type order of precedence.)
It's like ISNULL() but for multiple parameters, rather than just two.
It's also ANSI-SQL, where-as ISNULL() isn't.
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How do I add a margin between bootstrap columns without wrapping [duplicate]
...0.2) 0%, rgba(125, 185, 232, 0) 100%);
background-repeat: repeat;
border-radius:10px;
padding: 5px;
}
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Xcode 4 says “finished running ” on the targeted device — Nothing happens
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Bingo: I had to do the two steps described in order to run properly on my old iPhone 3G. Thanks MattyG!
– Ariel Malka
Oct 17 '11 at 10:27
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Signed versus Unsigned Integers
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little vs. big endian has to do with the order of the bytes on the platform. Little endian might do 0xFF 0xFE 0x7F while big endian will do 0x7F 0xFE 0xFF.
– Jasper Bekkers
Oct 29 '08 at 18:35
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Expert R users, what's in your .Rprofile? [closed]
...l, NAs generated
Factors are great when you need them (e.g. implementing ordering in graphs) but a nuisance most of the time.
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Circular dependency in Spring
...ences is that bean injection / property setting might occur in a different order to what your XML wiring files would seem to imply. So you need to be careful that your property setters don't do initialization that relies on other setters already having been called. The way to deal with this is to ...
What are some good resources for learning about Artificial Neural Networks? [closed]
...u can scan in pages of text and feed each character through the network in order to perform classification. (You would have to train the network first of course!).
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