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Scala: join an iterable of strings
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How about mkString ?
theStrings.mkString(",")
A variant exists in which you can specify a prefix and suffix too.
See here for an implementation using foldLeft, which is much more verbose, but perhaps worth looking at for educati...
How to display nodejs raw Buffer data as Hex string
The following code uses SerialPort module to listen to data from a bluetooth connection.
2 Answers
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Can I add comments to a pip requirements file?
I'd like to add comments for a few packages in a pip requirements file. (Just to explain why that package is on the list.) Can I do this?
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Precedence and bitmask operations
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You are actually doing this:
var_dump(0b10 & (0b01 == 0));
var_dump(0b10 & (0b01 != 0));
Try:
var_dump((0b10 & 0b01) == 0);
var_dump((0b10 & 0b01) != 0);
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Finding quaternion representing the rotation from one vector to another
I have two vectors u and v. Is there a way of finding a quaternion representing the rotation from u to v?
7 Answers
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Android SQLite: nullColumnHack parameter in insert/replace methods
The Android SDK has some convenience methods for manipulating data with SQLite. However both the insert and replace methods use some nullColumnHack parameter which usage I don't understand.
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regex to match a single character that is anything but a space
I need to match a single character that is anything but a space but I don't know how to do that with regex.
2 Answers
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Using .sort with PyMongo
With PyMongo, when I try to retrieve objects sorted by their 'number' and 'date' fields like this:
1 Answer
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Inline code highlighting in reStructuredText
I know reStructuredText has this directive:
1 Answer
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Eclipse Autocomplete (percent sign, in Juno)
I started using Eclipse Juno a few days ago after using older versions for years.
1 Answer
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