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How to check if a variable is a dictionary in Python?
...ery few use-cases in Python that require explicit typechecking - most stem from inheriting a bad implementation to begin with ('god object's, overriding standard library/language constructs, etc.) The original question is itself an XY problem. Why does the OP need to check type? Because according to...
How to determine if a string is a number with C++?
...tring is a number. For a game I am writing I just need to check if a line from the file I am reading is a number or not (I will know if it is a parameter this way). I wrote the below function which I believe was working smoothly (or I accidentally edited to stop it or I'm schizophrenic or Windows ...
How to do an instanceof check with Scala(Test)
...he question. ScalaTest has built-in support for type check. See the answer from @martin-g
– maasg
Jun 7 '16 at 16:38
H...
Javascript objects: get parent [duplicate]
...
No. There is no way of knowing which object it came from.
s and obj.subObj both simply have references to the same object.
You could also do:
var obj = { subObj: {foo: 'hello world'} };
var obj2 = {};
obj2.subObj = obj.subObj;
var s = obj.subObj;
You now have three refere...
Set the table column width constant regardless of the amount of text in its cells?
...is useful to set the overflow property to hidden to prevent any extra text from coming out of the table.
You should make sure to leave all of the bordering and sizing for CSS, too.
Ok so here's what I have:
table {
border: 1px solid black;
table-layout: fixed;
width: 200px;
}
th,...
How to properly override clone method?
... directly calling the superclass' method in the try block, even if invoked from a subclass calling super.clone()) and the former should not since your class clearly should implement Cloneable.
Basically, you should log the error for sure, but in this particular instance it will only happen if you m...
What is the advantage of using forwarding references in range-based for loops?
...This doesn't compile because rvalue vector<bool>::reference returned from the iterator won't bind to a non-const lvalue reference. But this will work:
#include <vector>
int main()
{
std::vector<bool> v(10);
for (auto&& e : v)
e = true;
}
All that being ...
Get current directory name (without full path) in a Bash script
...variable; all built-in variable names are in all-caps (to distinguish them from local variables, which should always have at least one lower-case character). result=${PWD#*/} does not evaluate to /full/path/to/directory; instead, it strips only the first element, making it path/to/directory; using t...
RegEx to parse or validate Base64 data
...
From the RFC 4648:
Base encoding of data is used in many situations to store or transfer data in environments that, perhaps for legacy reasons, are restricted to US-ASCII data.
So it depends on the purpose of usage of t...
How to solve the “failed to lazily initialize a collection of role” Hibernate exception
...
From my experience, I have the following methods to solved the famous LazyInitializationException:
(1) Use Hibernate.initialize
Hibernate.initialize(topics.getComments());
(2) Use JOIN FETCH
You can use the JOIN FETCH sy...