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Memoization in Haskell?
... r = l + s
s' = s * 2
Since we can index, you can just convert a tree into a list:
toList :: Tree a -> [a]
toList as = map (index as) [0..]
You can check the work so far by verifying that toList nats gives you [0..]
Now,
f_tree :: Tree Int
f_tree = fmap (f fastest_f) nat...
CSS: How to remove pseudo elements (after, before,…)?
... you want to with this line
$('p').addClass('no-after'); // replace the p selector with what you need...
a working example at : http://www.jsfiddle.net/G2czw/
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How to check if a particular service is running on Ubuntu
...
For Ubuntu (checked with 12.04)
You can get list of all services and select by color one of them with 'grep':
sudo service --status-all | grep postgres
Or you may use another way if you know correct name of service:
sudo service postgresql status
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When should I use RequestFactory vs GWT-RPC?
...ms of commonalities of client and server because
On the client you need to convert "PROXIES" to your client domain objects and vice-versa. This is completely ridiculous. It could be done in few lines of code declaratively, but there's NO SUPPORT FOR THAT! If only we could map our domain objects to p...
JavaScript Form Submit - Confirm or Cancel Submission Dialog Box
...o you want to generate attendance?");
}
else
{
alert('Please Select Employee First');
return false;
}
}
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What is the correct XPath for choosing attributes that contain “foo”?
...ttribute::prop, as attribute is another search axis. Alternatively you can select the first 3 by using the position() function.
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Permission denied for relation
...O <role>;
e.g.
ALTER DEFAULT PRIVILEGES IN SCHEMA public
GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO admin;
If you use SERIAL or BIGSERIAL columns then you will probably want to do the same for SEQUENCES, or else your INSERT will fail (Postgres 10's IDENTITY doesn't suffer from t...
mysql: see all open connections to a given database?
...
That should do the trick for the newest MySQL versions:
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST WHERE DB = "elstream_development";
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Is it possible to set the equivalent of a src attribute of an img tag in CSS?
...options like 'Save image'. This is because assigning a content effectively converts img from empty replaced element to something like <span><img></span>.
– Ilya Streltsyn
Jul 14 '13 at 22:55
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React.js: Wrapping one component into another
...es, sometimes not. Choose wisely and don't bindly follow the 2018 trend of converting everything to render-props.
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