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What does the `forall` keyword in Haskell/GHC do?
... val = maybe onNothin onJust mval
This code doesn't compile (syntax error) in plain Haskell 98. It requires an extension to support the forall keyword.
Basically, there are 3 different common uses for the forall keyword (or at least so it seems), and each has its own Haskell extension: Scope...
How to cherry-pick from a remote branch?
...elopment branch, I have to use the merge commit hash to avoid "bad object" error.
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How to run a command in the background and get no output?
... @sabertooth1990 Your command line is faulty: -bash: syntax error near unexpected token '&'
– notes-jj
Feb 1 '17 at 17:28
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Add a CSS class to
...> 'submit_class_name_here' %>
This should do. If you're getting an error, chances are that you're not supplying the name.
Alternatively, you can style the button without a class:
form#form_id_here input[type=submit]
Try that, as well.
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The import org.junit cannot be resolved
... -> Java Build Path, but every now and then Eclipse still shows me this error, though running the tests is possible without problems. Restarting Eclipse resolves the problem - for a while. Any explanation for this?
– Thomas W
Jan 15 '18 at 13:27
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MySQL root access from all hosts
... This is not the perfect solution. It may work. For me it produced an error: ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY'
– Scriptlabs
Nov 16 '15 at 12:51
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How do I install the yaml package for Python?
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On Ubuntu 14.04 LTS, I got the error libyaml is not found or a compiler error: forcing --without-libyaml when using sudo pip install PyYAML. What should I do? Thanks.
– hengxin
Jul 23 '14 at 11:26
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Javascript calculate the day of the year (1 - 366)
... need to remove the -- from --m.
Note this assumes a valid date (although error-checking is just some characters more).
function dayNo(y,m,d){
return --m*31-(m>1?(1054267675>>m*3-6&7)-(y&3||!(y%25)&&y&15?0:1):0)+d;
}
<!-- some examples for the snippet -->...
Xcode source automatic formatting
...iguration.
Objective-Clean (paid, didn't try it yet) - app raising build errors if predefined style rules are violated - possibly quite hard to use within the team, so I didn't try it out.
With very minimal setup, you can get Xcode to use our App to enforce
your rules. If you are ever caught...
PHP PDO returning single row
...ence. If something goes wrong with query, depending on how you've got your error handling set up, it will either throw an Exception (desired, in my opinion) or you'll get an Invalid object method reference "fetch" on "false".... error, a form of which you would have gotten anyway because the query o...