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How do you sort an array on multiple columns?
I have a multidimensional array. The primary array is an array of
16 Answers
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How to recursively download a folder via FTP on Linux [closed]
... example:
wget -r ftp://user:pass@server.com/
You can also use -m which is suitable for mirroring. It is currently equivalent to -r -N -l inf.
If you've some special characters in the credential details, you can specify the --user and --password arguments to get it to work. Example with custom l...
std::next_permutation Implementation Explanation
...ements as digits and the permutations as numbers. Viewing the problem in this way we want to order the permutations/numbers in "ascending" order.
When we order numbers we want to "increase them by the smallest amount". For example when counting we don't count 1, 2, 3, 10, ... because there are stil...
Java regex email
First of all, I know that using regex for email is not recommended but I gotta test this out.
20 Answers
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boundingRectWithSize for NSAttributedString returning wrong size
...o get the rect for an attributed string, but the boundingRectWithSize call is not respecting the size I pass in and is returning a rect with a single line height as opposed to a large height (it is a long string). I have experimented by passing in a very large value for the height and also 0 as in t...
How can I get a view's current width and height when using autolayout constraints?
...u can only get the view's size in the xib. I'm talking about when the view is resized because of its constraints (maybe after a rotation, or in response to an event). Is there a way to get its current width and height?
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How to create SBT project with IntelliJ Idea?
...- modern versions of IntelliJ can import sbt project out of the box, otherwise you can either use sbt plugin to generate IntelliJ project, or use IntelliJ Scala plugin to create sbt project. Basic features work out of the box using both solutions, some complex builds can have problems, so try other ...
How to listen for changes to a MongoDB collection?
...of background job queue system with MongoDB as the data store. How can I "listen" for inserts to a MongoDB collection before spawning workers to process the job? Do I need to poll every few seconds to see if there are any changes from last time, or is there a way my script can wait for inserts to oc...
What is the Python 3 equivalent of “python -m SimpleHTTPServer”
What is the Python 3 equivalent of python -m SimpleHTTPServer ?
5 Answers
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What is the optimal Jewish toenail cutting algorithm?
...ith no restrictions, and then filter out all sequences that violate the jewish rule. Luckily, humans only have five toes per foot*, so there are only 5! = 120 unrestricted sequences.
Python example:
#seq is only valid when consecutive elements in the list differ by at least two.
def isValid(seq):...