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What is the Comonad typeclass in Haskell?
...tions of any other packages that provide a Comonad typeclass are also welcome). I've vaguely heard about Comonad, but all I really know about it is that is provides extract :: w a -> a , sort of a parallel to Monad's return :: a -> m a .
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PL/SQL, how to escape single quote in a string?
...al quoting:
stmt := q'[insert into MY_TBL (Col) values('ER0002')]';
Documentation for literals can be found here.
Alternatively, you can use two quotes to denote a single quote:
stmt := 'insert into MY_TBL (Col) values(''ER0002'')';
The literal quoting mechanism with the Q syntax is more fle...
SQL JOIN - WHERE clause vs. ON clause
... Explicit vs Implicit SQL Joins .
The answer may be related (or even the same) but the question is different.
18 Answers
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RegEx: Smallest possible match or nongreedy match
... section (?:blah)? but without matching unless absolutely necessary, use something like (?:blah){0,1}?. For a repeating match (either using {n,} or {n,m} syntax) append a question mark to try to match as few as possible (e.g. {3,}? or {5,7}?).
The documentation on regular expression quantifiers may...
How can I copy the output of a command directly into my clipboard?
... new terminal window (there may be other ways of doing it like Ctrl+T on some systems, but this is just for illustration purposes):
Terminal 1:
pwd | c
Terminal 2:
cd `v`
Notice the ` ` around v. This executes v as a command first and then substitutes it in-place for cd to use.
Only copy the c...
Difference Between Invoke and DynamicInvoke
... the difference between Invoke and DynamicInvoke in delegates? Please give me some code example which explain difference between that two methods.
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Flask-SQLAlchemy how to delete all rows in a single table
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Hmm, this worked for me, but only after changing it to something like this: models.User.query().delete()
– killthrush
Mar 18 '16 at 0:54
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How to clone all repos at once from GitHub?
...hing new that might get created for purposes of automation. I was hoping something like this:
29 Answers
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How do I get a plist as a Dictionary in Swift?
...am playing around with Apple's new Swift programming language and have some problems...
26 Answers
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How to add dividers and spaces between items in RecyclerView?
...ously in the ListView class, using the divider and dividerHeight parameters:
41 Answers
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