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Java default constructor
... your example, it would look like this assuming that the types are String, int and int, and that the class itself is public:
public Module()
{
super();
this.name = null;
this.credits = 0;
this.hours = 0;
}
This is exactly the same as
public Module()
{}
And exactly the same as having no...
Android read text raw resource file
...txtHelp.setText(new String(b));
} catch (Exception e) {
// e.printStackTrace();
txtHelp.setText("Error: can't show help.");
}
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Square retrofit server mock for testing
...new Retrofit.Builder()
// Using custom Jackson Converter to parse JSON
// Add dependencies:
// com.squareup.retrofit:converter-jackson:2.0.0-beta2
.addConverterFactory(JacksonConverterFactory.crea...
How can I count the number of matches for a regex?
...ve to do the following. (Starting from Java 9, there is a nicer solution)
int count = 0;
while (matcher.find())
count++;
Btw, matcher.groupCount() is something completely different.
Complete example:
import java.util.regex.*;
class Test {
public static void main(String[] args) {
...
Defining a function with multiple implicit arguments in Scala
... list must be the last one.
def myfun(arg:String)(implicit p1: String, p2:Int)={}
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How do I get the list of keys in a Dictionary?
...
You should be able to just look at .Keys:
Dictionary<string, int> data = new Dictionary<string, int>();
data.Add("abc", 123);
data.Add("def", 456);
foreach (string key in data.Keys)
{
Console.WriteLine(key);
}
...
Pointer vs. Reference
...
My rule of thumb is:
Use pointers if you want to do pointer arithmetic with them (e.g. incrementing the pointer address to step through an array) or if you ever have to pass a NULL-pointer.
Use references otherwise.
...
Best implementation for hashCode method for a collection
...uthor explains there why the approach is good.
A short version
Create a int result and assign a non-zero value.
For every field f tested in the equals() method, calculate a hash code c by:
If the field f is a boolean:
calculate (f ? 0 : 1);
If the field f is a byte, char, short or int: calcula...
Pretty-print C++ STL containers
...lt;algorithm>
// This works similar to ostream_iterator, but doesn't print a delimiter after the final item
template<typename T, typename TChar = char, typename TCharTraits = std::char_traits<TChar> >
class pretty_ostream_iterator : public std::iterator<std::output_iterator_tag, v...
How to display a Yes/No dialog box on Android?
...
AlertDialog.Builder really isn't that hard to use. It's a bit intimidating at first for sure, but once you've used it a bit it's both simple and powerful. I know you've said you know how to use it, but here's just a simple example anyway:
DialogInterface.OnClickListener dialogClickList...