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Applicatives compose, monads don't
...Bool -> m x -> m x -> m x
miffy mb mt mf = do
b <- mb
if b then mt else mf
which uses the result of some effect to decide between two computations (e.g. launching missiles and signing an armistice), whereas
iffy :: Applicative a => a Bool -> a x -> a x -> a x
iffy ab a...
Remove the last character in a string in T-SQL?
...
-- Chop off the end character
SET @String =
CASE @String WHEN null THEN null
ELSE (
CASE LEN(@String) WHEN 0 THEN @String
ELSE LEFT(@String, LEN(@String) - 1)
END
) END
SELECT @String
...
Changed GitHub password, no longer able to push back to the remote
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If you had your remote's password changed only, not the username, then try the following command to check remote's info:-
git remote show origin
This will ask for your password for the given git user, fill that in correctly, and now try:-
git pull
or,
git push
It should work unless yo...
Error: Could not find or load main class in intelliJ IDE
... 2nd option worked for me. But delete the configuration profile and then, right click your class --> run
– NoName
Dec 4 '17 at 22:28
2
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MySQL get row position in ORDER BY
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If OP can guarantee that name field is unique - then there is no reason to make query more complex. If he can't - then let's wait for his result expectations for tied names.
– zerkms
Sep 1 '10 at 3:24
...
How do I use installed packages in PyCharm?
...
Go into File → Settings → Project Settings → Project Interpreter.
Then press configure interpreter, and navigate to the "Paths" tab.
Press the + button in the Paths area. You can put the path to the module you'd like it to recognize.
But I don't know the path..
Open the python interp...
Break a previous commit into multiple commits
... correct commit, you have several choices:
If it was three commits back, then
$ git rebase -i HEAD~3
where 3 is how many commits back it is.
If it was farther back in the tree than you want to count, then
$ git rebase -i 123abcd~
where 123abcd is the SHA1 of the commit you want to split up.
...
Adding a library/JAR to an Eclipse Android project
...the (widely available) instructions for importing the third-party library, then adding it using Build Path (which makes it known to Eclipse for compilation purposes). Here is the step-by-step:
Download the library to your host
development system.
Create a new folder, libs, in
your Eclipse/Android ...
How to overload functions in javascript?
...ions.
Here's how one can discern between all these options in English and then I'll combine them all in code:
// get the data element associated with a particular key value
obj.data("key");
If the first argument passed to .data() is a string and the second argument is undefined, then the caller ...
How to paste yanked text into the Vim command line
...
Yes. Hit Ctrl-R then ". If you have literal control characters in what you have yanked, use Ctrl-R, Ctrl-O, ".
Here is an explanation of what you can do with registers. What you can do with registers is extraordinary, and once you know how ...