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How do I create an empty array/matrix in NumPy?
...might be best off to keep it in a list until it is finished, and only then convert it into an array.
e.g.
mylist = []
for item in data:
mylist.append(item)
mat = numpy.array(mylist)
item can be a list, an array or any iterable, as long
as each item has the same number of elements.
In this ...
Pros and Cons of Interface constants [closed]
...
Well, I think that it boils down to the difference between good and good enough.
While in most cases you can avoid the use of constants by implementing other patterns (strategy or perhaps flyweight), there is something to be said for not needing a half dozen other classes to represent ...
What is the meaning of “… …” token? i.e. double ellipsis operator on parameter pack
...mma is purely optional; §8.3.5/4 does say
Where syntactically correct and where “...” is not part of an abstract-declarator, “, ...” is synonymous with “...”.
This is within an abstract-declarator, [edit] but Johannes makes a good point that they are referring to an abstract-decla...
What is the argument for printf that formats a long?
...
On most platforms, long and int are the same size (32 bits). Still, it does have its own format specifier:
long n;
unsigned long un;
printf("%ld", n); // signed
printf("%lu", un); // unsigned
For 64 bits, you'd want a long long:
long long n;
uns...
C++ Double Address Operator? (&&)
I'm reading STL source code and I have no idea what && address operator is supposed to do. Here is a code example from stl_vector.h :
...
Is it a bad practice to use break in a for loop? [closed]
...sily-readable loops. If the body of your loop spans several screen lengths and has multiple nested sub-blocks, yes, you could easily forget that some code won't be executed after the break. If, however, the loop is short and to the point, the purpose of the break statement should be obvious.
If a l...
How to return an array from JNI to Java?
I am attempting to use the android NDK.
4 Answers
4
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How to store arrays in MySQL?
...
The proper way to do this is to use multiple tables and JOIN them in your queries.
For example:
CREATE TABLE person (
`id` INT NOT NULL PRIMARY KEY,
`name` VARCHAR(50)
);
CREATE TABLE fruits (
`fruit_name` VARCHAR(20) NOT NULL PRIMARY KEY,
`color` VARCHAR(20),
`price` INT
)...
How to create a generic array in Java?
...i.e. its constructor was explicitly called with a Class<E> argument, and methods will throw an exception when they are passed arguments that are not of type E. See Collections.checkedCollection.
-> in that case, you should write:
public class GenSet<E> {
private E[] a;
pub...
Why can I not push_back a unique_ptr into a vector?
...d Aug 15 '16 at 17:11
parker.sikand
1,3131414 silver badges2929 bronze badges
answered Jul 19 '10 at 18:15
Jam...