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Abusing the algebra of algebraic data types - why does this work?
...e distinguished even if their types are the same. For what it's worth, the more common term is simply "sum type".
Singleton types are, effectively, all unit types. They behave identically under algebraic manipulations and, more importantly, the amount of information present is still preserved.
You p...
Listing each branch and its last revision's date in Git
...s cleaner. And faster.
See also "Name only option for git branch --list?"
More generally, tripleee reminds us in the comments:
Prefer modern $(command substitution) syntax over obsolescent backtick syntax.
(I illustrated that point in 2014 with "What is the difference between $(command...
Java: notify() vs. notifyAll() all over again
...ybeMakeConditionFalseAgain();
}
That way, if an o.notifyAll() call wakes more than one waiting thread, and the first one to return from the o.wait() makes leaves the condition in the false state, then the other threads that were awakened will go back to waiting.
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Difference between onStart() and onResume()
...eate() and onRestart() and not bother to override onStart() at all but the more that needs to be done between onCreate() -> onResume() and onRestart() -> onResume(), the more I'm duplicating things.
So, to requote once more...
Why can't it be the onResume() is invoked after onRestart() an...
How to split csv whose columns may contain ,
...7c5d8ab47a293d35
34
See Microsoft.VisualBasic.FileIO.TextFieldParser for more information.
You need to add a reference to Microsoft.VisualBasic in the Add References .NET tab.
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What is the Git equivalent for revision number?
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Given two directory trees, how can I find out which files differ by content?
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Aggregate / summarize multiple variables per group (e.g. sum, mean)
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Best way to extract a subvector from a vector?
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Find duplicate lines in a file and count how many time each line was duplicated?
...ere is one number per line:
sort <file> | uniq -c
You can use the more verbose --count flag too with the GNU version, e.g., on Linux:
sort <file> | uniq --count
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