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Overloading and overriding
...with the same name but different signatures.
//Overloading
public class test
{
public void getStuff(int id)
{}
public void getStuff(string name)
{}
}
Overriding
Overriding is a principle that allows you to change the functionality of a method in a child class.
//Overriding
pu...
Java - get pixel array from image
I'm looking for the fastest way to get pixel data (int the form int[][] ) from a BufferedImage . My goal is to be able to address pixel (x, y) from the image using int[x][y] . All the methods I have found do not do this (most of them return int[] s).
...
Read file line by line using ifstream in C++
...e;
while (std::getline(file, line)) {
// using printf() in all tests for consistency
printf("%s", line.c_str());
}
file.close();
}
[Fast] Use Boost's file_description_source
Another possibility is to use the Boost library, but the code gets a bit more verbose. The perf...
Remove the last three characters from a string
...
string test = "abcdxxx";
test = test.Remove(test.Length - 3);
//output : abcd
share
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improve this answer
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Returning unique_ptr from functions
...t has been given to that function.
The example could be like this:
class Test
{int i;};
std::unique_ptr<Test> foo1()
{
std::unique_ptr<Test> res(new Test);
return res;
}
std::unique_ptr<Test> foo2(std::unique_ptr<Test>&& t)
{
// return t; // this will p...
What's the fastest way to merge/join data.frames in R?
... the precise computation can make a huge difference on which package is fastest. For example, we do a merge and an aggregate below. We see that the results are nearly reversed for the two. In the first example from fastest to slowest we get: data.table, plyr, merge and sqldf whereas in the second...
ios app maximum memory budget
... that's why I want to limit them with a budget. I guess we'll just have to test on many different devices in different settings to find a reasonable maximum memory footprint to use.
– frilla
May 5 '11 at 0:42
...
Cookies on localhost with explicit domain
...ng the 'domain' portion of the cookie at all." For example, using a simple test to completely leave out the domain section of the cookie works for localhost: ((domain && domain !== "localhost") ? ";domain="+domain : "")
– L0j1k
Apr 15 '15 at 21:36
...
Convert a Map to a POJO
...tAge(), getSavings());
}
}
Sample conversion code:
public class CopyTest {
@Test
public void testCopyMapToPOJO() throws Exception {
final Map<String, String> map = new HashMap<String, String>(4);
map.put("id", "5");
map.put("name", "Bob");
m...
Should CSS always preceed Javascript?
... you're right; it's high time we do some actual research!
I set up my own test harness in Node (code below). Basically, I:
Made sure there was no HTTP caching so the browser would have to do a full download each time a page is loaded.
To simulate reality, I included jQuery and the H5BP CSS (so t...