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Is Big O(logn) log base e?
... big-O notation is usually written showing only the asymptotically highest order of n, so constant coefficients will drop away. Since a different logarithm base is equivalent to a constant coefficient, it is superfluous.
That said, I would probably assume log base 2.
...
How can I list ALL grants a user received?
...s rsp ON (rp.granted_role = rsp.role)
WHERE rp.grantee = <theUser>
ORDER BY 1;
Direct grants to tables/views:
SELECT owner, table_name, select_priv, insert_priv, delete_priv, update_priv, references_priv, alter_priv, index_priv
FROM table_privileges
WHERE grantee = <theUser>
OR...
Regular Expressions: Is there an AND operator?
...or, it isn't necessary that it be in a lookahead, but it doesn't hurt.
In order to match a whole paragraph, you need to anchor the regex at both ends and add a final .* to consume the remaining characters. Using Perl-style notation, that would be:
/^(?=.*word1)(?=.*word2)(?=.*word3).*$/m
The 'm...
Is the SQL WHERE clause short-circuit evaluated?
...
ANSI SQL Draft 2003 5WD-01-Framework-2003-09.pdf
6.3.3.3 Rule evaluation order
[...]
Where the precedence is not determined by the Formats or by
parentheses, effective evaluation of expressions is generally
performed from left to right. However, it is
implementation-dependent whether expressions a...
How does JavaScript handle AJAX responses in the background?
...f 'ajax' requests. In my handler (for each request--returned in arbitrary order) I run some code that may take some time. Good to know this should definitely work.
– iPadDeveloper2011
Dec 6 '12 at 6:06
...
How to avoid long nesting of asynchronous functions in Node.js
... look at flow-js, step and async and it seems that they only deal with the order of function execution. In my case there is access to inline closure variables in every indentation. So for example the functions work like this: get HTTP req/res, get userid from DB for cookie, get email for the later u...
What is the advantage of using heredoc in PHP? [closed]
...queries:
$sql = <<<SQL
select *
from $tablename
where id in [$order_ids_list]
and product_name = "widgets"
SQL;
To me this has a lower probability of introducing a syntax error than using quotes:
$sql = "
select *
from $tablename
where id in [$order_ids_list]
and product_nam...
Bare asterisk in function arguments?
...s probably to quietly gobble up all the remaining positional arguments, in order to force the remaining arguments to be keyword-only.
– Stephen
Apr 25 '18 at 17:19
11
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How does java do modulus calculations with negative numbers?
...eneral, int result = (-a) % b; gives the right answer when |-a| > b. In order to get the proper result when |-a| < b we should wrap the divisor. int result = ((-a) % b) + b; for negative a or int result = (((-a) % b) + b) % b; for positive or negative a
– Oz Edri
...
What is the correct MIME type to use for an RSS feed?
...ood choice, as it states that it accepts RSS, Atom, and XML (in descending order or preference).
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