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Elegant way to combine multiple collections of elements?
...tatic method as in OP:
public static IEnumerable<T> Concat<T>(params IEnumerable<T>[] sequences)
{
return sequences.SelectMany(x => x);
}
So I can write:
return EnumerableEx.Concat
(
list1.Select(x = > x),
list2.Where(x => true),
list3.OrderBy(x => ...
Collections.emptyList() vs. new instance
... Starting with Java 7, you can let the compiler infer the type parameter of the generic method invocation from the target type: List<Foo> list = Collections.emptyList()
– Paul Jackson
May 15 '15 at 20:16
...
Convert Enum to String
..."variableEnum". It reflects (at build time) the name of the field/property/param/variable not the value.
– Keith
Feb 15 '19 at 18:47
...
Batch: Remove file extension
...ption table Dirk. My case was getting the file name without extension from param %1 in a batch script. echo %~n1 was what I was after.
– Dave Pile
Nov 30 '19 at 9:13
...
Why is there no Char.Empty like String.Empty?
...;char> RemoveChars(this IEnumerable<char> originalString,
params char[] removingChars)
{
return originalString.Except(removingChars);
}
}
and its usage:
var veryLongText = "abcdefghijk...";
IEnumerable<char> firstFiveCharsWithoutCsAndDs = ver...
Remove directory which is not empty
...lso renamed function to rimraf ;)
/**
* Remove directory recursively
* @param {string} dir_path
* @see https://stackoverflow.com/a/42505874/3027390
*/
function rimraf(dir_path) {
if (fs.existsSync(dir_path)) {
fs.readdirSync(dir_path).forEach(function(entry) {
var entry_...
Find a class somewhere inside dozens of JAR files?
...t<String> foundIn = new LinkedList<String>();
/**
* @param args the first argument is the path of the file to search in. The second may be the
* class file to find.
*/
public static void main(String[] args) {
if (!CLASS_FILE_TO_FIND.endsWith(".class...
Create a string with n characters
...r;
/**
* Creates a string of spaces that is 'spaces' spaces long.
*
* @param spaces The number of spaces to add to the string.
*/
public String spaces( int spaces ) {
return CharBuffer.allocate( spaces ).toString().replace( '\0', ' ' );
}
Invoke using:
System.out.printf( "[%s]%n", spaces( ...
Converting java.util.Properties to HashMap
...ava.util.Map , And java.util.HashMap's constructor receives a Map type param. So, why must it be converted explicitly?
...
Spring 3 RequestMapping: Get path value
...h from a controller mapping. /controllerUrl/** => return matched **
* @param request incoming request.
* @return extracted path
*/
public static String extractPathFromPattern(final HttpServletRequest request){
String path = (String) request.getAttribute(
HandlerMapping.PATH_W...