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Posts by r~~
tl;dr: No. From an engineering perspective, you might be asking if a concatenation operator can be used in place of a logical ‘and’ operator. This is obviously specific to a particular language, bu...
slice(None) will give you a value that's equivalent to a bare : in slice syntax. So you can write, for example, for i in range(4): print(new_array[tuple(slice(None) if i == j else n for j, n ...
A namespace is a category to which a name can belong. Think of family names for people: I may be friends with several Jims, and if only one of them is present I can just call him Jim. But if multip...
Use os.fork(). Example: import os import time pid = os.fork() if pid == 0: os.setsid() # Prevents the child from being killed if the parent dies time.sleep(10) os.system('some...
CPython only very recently started keeping a reference on frames to function objects internally, and that reference isn't exposed from inside Python. There's an old PEP that would have defined a _...
It isn't writable (but then again, neither are the dictionary views), but you might be interested in more_itertools.SequenceView.
Remember that jQuery selectors in general can match more than one element. If you had multiple <p> elements in your page, $('p').wrap(wrapper) would put wrapper divs around each of them. So ....
IList<T> is not necessarily representative of the general case; it's an interface that is (A) widely implemented by a variety of classes from a variety of sources, which themselves (B) tend t...
Here is an animation of a cube with faces subdivided into two rectangles, morphing into a rhombic dodecahedron, with the Platonic dodecahedron as an intermediate state. This demonstrates that the e...
From section 7.21.6.2 of this draft: [T]he result of the conversion is placed in the object pointed to by the first argument following the format argument that has not already received a conve...
(Elsewhere...) You look over a post on Code Reviews, and you don't find any problems. Should you post an ‘it's fine’ answer, stay silent, or do something else? Seems to me there's some value in hav...
The hard part is figuring out exactly how your code needs to adapt to changes in the JSON structure. In your example, presumably the rest of your program needs to depend on the names and types in p...
From the page you linked: -Wconversion Warn for implicit conversions that may alter a value. This includes conversions between real and integer, like abs (x) when x is double; conversions betwe...
Eq is a type class, and type class names are capitalized (like types and constructors). Changing eq to Eq should get you past that error. Conversely, in SimpleEnigma = SimpleEnigma rotor1 rotor...
It's entirely possible that there's some no-code product being developed out there that supports connecting to Reddit's API, so that you could collect the information you want without writing an ac...
There have now been two questions about Cypher, the Neo4j query language. Highlight.js doesn't support Cypher syntax highlighting out of the box, but they do offer a drop-in highlightjs-cypher modu...
Yes, you can achieve this using UNWIND and CALL, in the following pattern: UNWIND ['Canada', 'Europe'] AS region CALL { WITH region query } RETURN * You can replace RETURN * with any o...
Something like this query should work for you: MATCH (a:Person)-[:IS_SON]->()-[:WAS_BORN]->(b:Country) WITH a, count(DISTINCT b) AS birthplaces WHERE birthplaces = 1 RETURN a Note that...
As the walk documentation describes: When an array is encountered, f is first applied to its elements and then to the array itself In other words, walk is bottom-up. So when you apply your fi...
<set> does seem to be a bit finicky for this case, doesn't it? You can use <animateTransform> if you set the values attribute on it instead of the to attribute, like this: <animate...
when I look at the type signatures, it is not supposed to work. The types work because they're parameterized. The types of the combinators involved are (renaming all parameters to be unique fo...
There's good reason to believe this is simply historical accident. The Semialign class came first, and used to include zip and zipWith directly. When those members were separated out into their own...
Is there a "cleaner" implementation similar to map's? Yes: let map f = id >=> switch f This follows from two of your other equations: map f = bind (switch f) g >=> h = g >...
Okay, I'll be the contrarian. For this case, yes, I think a regex-based approach can be used to validate these properties. This approach will not guarantee that the provided input is valid HTML; in...
Is this for purely technical reasons as there would have to be at least 2 Semigroup instances (for addition and multiplication), but type classes cannot be implemented multiple times for the same...
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