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Java: Check if enum contains a given string?
...s my problem - I'm looking for (if it even exists) the enum equivalent of ArrayList.contains(); .
29 Answers
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Can an enum class be converted to the underlying type?
...ression is required:
int a[to_integral(my_fields::field)]; //declaring an array
std::array<int, to_integral(my_fields::field)> b; //better!
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How do I trim whitespace from a string?
...- strip instead of trim, isinstance instead of instanceof, list instead of array, etc, etc. Why not just use the names everyone is familiar with?? geez :P
– Gershom
Nov 3 '15 at 18:10
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how to listen to N channels? (dynamic select statement)
...o a zero
value received because the channel is closed).
You pass in an array of SelectCase structs that identify the channel to select on, the direction of the operation, and a value to send in the case of a send operation.
So you could do something like this:
cases := make([]reflect.SelectCas...
Why isn't my Pandas 'apply' function referencing multiple columns working? [closed]
... loops, best of
3: 70.9 µs per loop
Example 3: vectorize using numpy arrays:
%%timeit
df['a'].values % df['c'].values
The slowest run took 7.98 times longer than the fastest. This could
mean that an intermediate result is being cached. 100000 loops, best
of 3: 6.39 µs per loop
So ...
Why the switch statement cannot be applied on strings?
...ly support strings as a type. It does support the idea of a constant char array but it doesn't really fully understand the notion of a string.
In order to generate the code for a switch statement the compiler must understand what it means for two values to be equal. For items like ints and enum...
make_unique and perfect forwarding
... STL) has a better solution for make_unique, which works correctly for the array version.
#include <memory>
#include <type_traits>
#include <utility>
template <typename T, typename... Args>
std::unique_ptr<T> make_unique_helper(std::false_type, Args&&... args)...
how to get the last character of a string?
...
Side note: arrays also have a slice() method. - Their functionality is conceptually similar (partial copies) -------- (Just in case you're reading code and see .slice())
– Peter Ajtai
Oct 7 '10 at ...
How to convert an iterator to a stream?
...e that as a basis for your stream:
Iterator<String> sourceIterator = Arrays.asList("A", "B", "C").iterator();
Stream<String> targetStream = StreamSupport.stream(
Spliterators.spliteratorUnknownSize(sourceIterator, Spliterator.ORDERED),
false);
An alternative which is...
pyplot scatter plot marker size
...ter denotes the markersize**2. As the documentation says
s : scalar or array_like, shape (n, ), optional
size in points^2. Default is rcParams['lines.markersize'] ** 2.
This can be taken literally. In order to obtain a marker which is x points large, you need to square that number and give i...