大约有 16,000 项符合查询结果（耗时：0.0253秒） [XML]
Android read text raw resource file
...txtHelp.setText(new String(b));
} catch (Exception e) {
// e.printStackTrace();
txtHelp.setText("Error: can't show help.");
}
share
|
improve this answer
|
...
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) {
...
Enum ToString with user friendly strings
...
I created a reverse extension method to convert the description back into an enum value:
public static T ToEnumValue<T>(this string enumerationDescription) where T : struct
{
var type = typeof(T);
if (!type.IsEnum)
throw new ArgumentExceptio...
Defining a function with multiple implicit arguments in Scala
... list must be the last one.
def myfun(arg:String)(implicit p1: String, p2:Int)={}
share
|
improve this answer
|
follow
|
...
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.
...
An algorithm for inflating/deflating (offsetting, buffering) polygons
...ed this jsFiddle that uses JSTS (JavaScript port of JTS). You just need to convert the coordinates you have to JSTS coordinates:
function vectorCoordinates2JTS (polygon) {
var coordinates = [];
for (var i = 0; i < polygon.length; i++) {
coordinates.push(new jsts.geom.Coordinate(polygon[i...
java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
...ny supplementary characters in
utf8 columns and you need not worry about converting characters or
losing data when upgrading utf8 data from older versions of MySQL.
So to support these characters, your MySQL needs to be 5.5+ and you need to use utf8mb4 everywhere. Connection encoding needs to ...
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...
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...