com.github.bicoco

Class $

java.lang.Object

com.github.bicoco.$

public class $
extends Object

This library is a collection of auxiliary methods for accessing, searching and otherwise manipulating List objects. The '$' character is inspired in jQuery library, and the methods in the Array class of ruby language.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	$.Condition<T>
static interface	$.Each<T>
static interface	$.Map<T>
static interface	$.Transform<T,R>

Constructor Summary

Constructors

Constructor and Description
$()

Method Summary

Methods

Modifier and Type	Method and Description
static <T> T	at(List<T> list, int index)
static <T> void	compact$(List<T> list) Remove null values in list
static <T> int	count(List<T> list)
static <T> int	count(List<T> list, $.Condition<T> condition)
static <T> List<T>	drop(List<T> list, int n) Get the elements of list excluding the first n elements
static <T> void	each(List<T> list, $.Each<T> each)
static <T> T	fetch(List<T> list, int index) Identical of List.get(int)
static <T> T	fetch(List<T> list, int index, T def) Null-safe, get element at index, with default value.
static <T> T	first(List<T> list)
static <T> void	insert(List<T> list, T... ts)
static <T> ListHelper<T>	insert(List<T> list, T t)
static <T> boolean	isEmpty(List<T> list)
static <T> boolean	isNotEmpty(List<T> list)
static <T> T	last(List<T> list)
static <T> int	length(List<T> list)
static <T> List<T>	map(List<T> list, $.Map<T> map)
static <T> void	map$(List<T> list, $.Map<T> map)
static <T> List<T>	reject(List<T> list, $.Condition<T> condition)
static <T> void	reject$(List<T> list, $.Condition<T> condition)
static <T> List<T>	select(List<T> list, $.Condition<T> condition)
static <T> void	select$(List<T> list, $.Condition<T> condition)
static <T> int	size(List<T> list)
static <T> List<T>	take(List<T> list, int n) Get the first n elements of list
static <T,R> List<R>	transform(List<T> list, $.Transform<T,R> transform)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

$

public $()

Method Detail

each

public static <T> void each(List<T> list,
            $.Each<T> each)

map

public static <T> List<T> map(List<T> list,
              $.Map<T> map)

select

public static <T> List<T> select(List<T> list,
                 $.Condition<T> condition)

reject

public static <T> List<T> reject(List<T> list,
                 $.Condition<T> condition)

transform

public static <T,R> List<R> transform(List<T> list,
                      $.Transform<T,R> transform)

map$

public static <T> void map$(List<T> list,
            $.Map<T> map)

select$

public static <T> void select$(List<T> list,
               $.Condition<T> condition)

reject$

public static <T> void reject$(List<T> list,
               $.Condition<T> condition)

compact$

public static <T> void compact$(List<T> list)

Remove null values in list

Parameters:

list - values list of type T

at

public static <T> T at(List<T> list,
       int index)

fetch

public static <T> T fetch(List<T> list,
          int index)

Identical of List.get(int)

Parameters:

list - list of elements

index - index of element

Returns:

The element at index

Throws:

IndexOutOfBoundsException

fetch

public static <T> T fetch(List<T> list,
          int index,
          T def)

Null-safe, get element at index, with default value.

Parameters:

list - list of elements

index - index of element

def - Default value

Returns:

element of list or default value

first

public static <T> T first(List<T> list)

last

public static <T> T last(List<T> list)

take

public static <T> List<T> take(List<T> list,
               int n)

Get the first n elements of list

Parameters:

list - values list of type T

n - number of elements

Returns:

List of the first n elements

drop

public static <T> List<T> drop(List<T> list,
               int n)

Get the elements of list excluding the first n elements

Parameters:

list - list of elements

n - number of elements to exclude

Returns:

list of the elements

isEmpty

public static <T> boolean isEmpty(List<T> list)

isNotEmpty

public static <T> boolean isNotEmpty(List<T> list)

size

public static <T> int size(List<T> list)

count

public static <T> int count(List<T> list)

count

public static <T> int count(List<T> list,
            $.Condition<T> condition)

length

public static <T> int length(List<T> list)

insert

public static <T> void insert(List<T> list,
              T... ts)

insert

public static <T> ListHelper<T> insert(List<T> list,
                       T t)