com.github.bicoco

Class ListHelper<T>

java.lang.Object

com.github.bicoco.ListHelper<T>

public class ListHelper<T>
extends Object

Constructor Summary

Constructors

Constructor and Description
ListHelper(List<T> list)

Method Summary

Methods

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ListHelper

public ListHelper(List<T> list)

Parameters:

list - list of elements

Method Detail

each

public void each($.Each<T> each)

map

public List<T> map($.Map<T> map)

select

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

reject

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

transform

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

map$

public void map$($.Map<T> map)

select$

public void select$($.Condition<T> condition)

reject$

public void reject$($.Condition<T> condition)

compact$

public void compact$()

Remove null values in list

at

public T at(int index)

fetch

public T fetch(int index)

Identical of List.get(int)

Parameters:

index - index of element

Returns:

Object T at param index

Throws:

IndexOutOfBoundsException

fetch

public T fetch(int index,
      T def)

Null-safe, defining the default value

Parameters:

index - index of element

def - Default value

Returns:

element of list or default value

first

public T first()

last

public T last()

take

public List<T> take(int n)

Get the first n elements of list

Parameters:

n - number of elements

Returns:

List of the first n elements

drop

public List<T> drop(int n)

isEmpty

public boolean isEmpty()

size

public int size()

isNotEmpty

public boolean isNotEmpty()

count

public int count()

count

public int count($.Condition<T> condition)

length

public int length()

insert

public void insert(T... ts)

insert

public ListHelper<T> insert(T t)