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How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
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Double A
First, lets start with this code without virtual inheritance:
#include<iostream>
using namespace std;
class A {
public:
A() { cout << "A::A() "; }
A(int x) : m_x(x) { cout << "A::A(" << x << ") "; }
int getX() const { return m_x...
How can I recall the argument of the previous bash command?
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@RNA, I just tried it again to make sure I didn't include a typo, could you provide a little more detail (eg. ubuntu command line, cygwin for windows? error message? previous line?)
– Robert Gowland
Feb 14 '14 at 14:59
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jQuery: Check if div with certain class name exists
...elected answer uses a perf test, but it's slightly flawed since it is also including element selection as part of the perf, which is not what's being tested here. Here is an updated perf test:
http://jsperf.com/check-if-div-exists/3
My first run of the test shows that property retrieval is faster ...
Count number of days between two dates
...haviour remains the same in all recent versions of Ruby and ActiveSupport, include 2.0 and 4.1.0 respectively. Time objects do return seconds though.
– Andrew France
Apr 23 '14 at 23:04
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Deleting all files from a folder using PHP?
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If you want to delete everything from folder (including subfolders) use this combination of array_map, unlink and glob:
array_map( 'unlink', array_filter((array) glob("path/to/temp/*") ) );
This call can also handle empty directories ( thanks for the tip, @mojuba!)
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Is it possible to perform a 'grep search' in all the branches of a Git project?
...(git rev-list --all)
That searches through all the commits, which should include all the branches.
Another form would be:
git rev-list --all | (
while read revision; do
git grep -F 'yourWord' $revision
done
)
You can find even more example in this article:
I tried the above...
Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
... is actually calculated is i*x.strides[0]+j*x.strides[1] (and this already includes the factor for the size of an int):
x.strides
(16, 4)
When y is extracted like above, NumPy does not create a new buffer, but it does create a new array object referencing the same buffer (otherwise y would just b...
Android: Difference between Parcelable and Serializable?
...approach in combination with custom serialization
behavior, then we must include these two methods with the same exact
signature as the one below:
private void writeObject(java.io.ObjectOutputStream out)
throws IOException;
private void readObject(java.io.ObjectInputStream in)
throws ...
Match all elements having class name starting with a specific string [duplicate]
... Not sure why you've overqualified with div - or why you didn't include the -
– sheriffderek
Sep 11 '15 at 17:09
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show 4 more co...
Check whether an array is empty [duplicate]
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While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
– mathielo
May 12 '15 at 21:59
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