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Pandoc markdown page break
... solution when targeting other formats is to use a pandoc filter which can transform the internal document representation such that it suites our needs. Pandoc 2.0 and later even allows to use the included Lua interpreter to perform this transformation.
Let's assume we are indicating page breaks by...
lexers vs parsers
... CNF has hardly anything to do with the topic at hand. EBNF can easily be transformed into standard BNF. Period. It is syntactic sugar for standard BNF.
– babou
Jun 11 '14 at 12:35
...
Javascript reduce on array of objects
... fact, map and filter can both be implemented as reductions:
const map = (transform, array) =>
array.reduce((list, el) => list.concat(transform(el)), []);
const filter = (predicate, array) => array.reduce(
(list, el) => predicate(el) ? list.concat(el) : list,
[]
);
I hope this ...
How to read XML using XPath in Java
...on | ParserConfigurationException | XPathExpressionException
| TransformerException e) {
e.printStackTrace();
}
}
private static String nodeToString(Node node) throws TransformerException {
StringWriter buf = new StringWriter();
Transformer xform = TransformerFactory...
Circle-Rectangle collision detection (intersection)
...s algorithm to accommodate that case, one should simply apply a coordinate transformation where the origin is at the rectangle center and the rectangle isn't oblique anymore. You need to apply the transformation to the circle center only.
– enobayram
Apr 5 '13 ...
Get unique values from a list in python [duplicate]
...t:
>>> a = ['a', 'b', 'c', 'd', 'b']
To get unique items, just transform it into a set (which you can transform back again into a list if required):
>>> b = set(a)
>>> print(b)
{'b', 'c', 'd', 'a'}
...
What's the difference between NOT EXISTS vs. NOT IN vs. LEFT JOIN WHERE IS NULL?
...
If the database is good at optimising the query, the two first will be transformed to something close to the third.
For simple situations like the ones in you question, there should be little or no difference, as they all will be executed as joins. In more complex queries, the database might no...
Fast way of counting non-zero bits in positive integer
...et in the bucket (0 if no bits are set and 1 if one bit is set). The first transformation results in an analogous state, but with 32 buckets each 2-bit long. This is achieved by appropriately shifting the buckets and adding their values (one addition takes care of all buckets since no carry can occu...
What does value & 0xff do in Java?
...2 in 32-bit, two's complement), not 00 00 00 fe (decimal value 254). This transformation (from a byte value fe to an int value ff ff ff fe) is known as sign extension and is part of the Java language specification. The purpose of value & 0xff is to undo the sign extension (i.e., to simulate zero...
How to optimize for-comprehensions and loops in Scala?
...
Update 5/28:
As a short term solution, the ScalaCL plugin (alpha) will transform simple Scala loops into the equivalent of while loops.
As a potential longer term solution, teams from the EPFL and Stanford are collaborating on a project enabling run-time compilation of "virtual" Scala for very h...