_ (Java List Helpers 1.3 API)

java.lang.Object
- com.github.bicoco._

Deprecated.
This class was deprecated because the '_' character is a identifier in the Java 9
```
@Deprecated
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 Underscore library, and the methods in the Array class of ruby language. This class is a wrapper for the methods of api.

Since:

1.0

See Also:

Helpers

Constructor Summary

Constructors
Constructor and Description

_()
Deprecated.

Constructors
Constructor and Description
`_()` Deprecated.

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`static <T> boolean`	`all(List<T> list, ConditionFunction<T> function)` Deprecated. Returns true if all of the values in the list pass the predicate truth test
`static <T> boolean`	`any(List<T> list, ConditionFunction<T> function)` Deprecated. Returns true if any of the values in the list pass the predicate truth test
`static <T> T`	`at(List<T> list, int index)` Deprecated. Return the element at index.
`static <T> void`	`compact$(List<T> list)` Deprecated. Remove null values in list
`static <T> int`	`count(List<T> list)` Deprecated. Return size of list or 0 to empty list.
`static <T> int`	`count(List<T> list, ConditionFunction<T> function)` Deprecated. Return size of list where function returns true, or 0 to empty list.
`static <T> List<T>`	`drop(List<T> list, int n)` Deprecated. Get the elements of list excluding the first n elements
`static <T> void`	`each(List<T> list, EachFunction<T> function)` Deprecated. Execute a custom action for each element of list.
`static <T> T`	`fetch(List<T> list, int index)` Deprecated. Identical to `List.get(int)`
`static <T> T`	`fetch(List<T> list, int index, T def)` Deprecated. Null-safe, get element at index, with default value.
`static <T> T`	`first(List<T> list)` Deprecated. Get the first element of list.
`static <T> boolean`	`isEmpty(List<T> list)` Deprecated. Check if list is empty
`static <T> boolean`	`isNotEmpty(List<T> list)` Deprecated. Check if list is not empty
`static <T> T`	`last(List<T> list)` Deprecated. Get the last element of list.
`static <T> List<T>`	`map(List<T> list, MapFunction<T> function)` Deprecated. Return a new list of same type element, applying new value for each element.
`static <T> void`	`map$(List<T> list, MapFunction<T> function)` Deprecated. Modifing list applying new value for each element.
`static <T> void`	`push(List<T> list, T... ts)` Deprecated. Adding multiple elements to the end of list.
`static <T> ListHelper<T>`	`push(List<T> list, T t)` Deprecated. Adding element to the end of list.
`static <T,R> R`	`reduce(List<T> list, R initialValue, ReduceFunction<T,R> function)` Deprecated. Transform a list on a single value
`static <T> List<T>`	`reject(List<T> list, ConditionFunction<T> function)` Deprecated. Select all elements that condition returns false.
`static <T> void`	`reject$(List<T> list, ConditionFunction<T> function)` Deprecated. Select all elements that condition returns false.
`static <T> List<T>`	`select(List<T> list, ConditionFunction<T> function)` Deprecated. Select all elements that condition returns true.
`static <T> void`	`select$(List<T> list, ConditionFunction<T> function)` Deprecated. Select all elements that condition returns true.
`static <T> int`	`size(List<T> list)` Deprecated. Identical to List#size()
`static <T> List<T>`	`take(List<T> list, int n)` Deprecated. Get the first n elements of list
`static <T,R> List<R>`	`transform(List<T> list, TransformFunction<T,R> function)` Deprecated. Return a new list of another type element, applying a function for each element.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - _
```
public _()
```
    Deprecated.
- Method Detail
  - each
```
public static <T> void each(List<T> list,
                            EachFunction<T> function)
```
    Deprecated.
    
    Execute a custom action for each element of list.
    
    Parameters:
    
    list - list of elements to iterate
    
    function - function to execute in each element
  - map
```
public static <T> List<T> map(List<T> list,
                              MapFunction<T> function)
```
    Deprecated.
    
    Return a new list of same type element, applying new value for each element.
    
    Parameters:
    
    list - list of elements to iterate
    
    function - function to apply in each value that returns the new value
    
    Returns:
    
    changed list of same type element
  - transform
```
public static <T,R> List<R> transform(List<T> list,
                                      TransformFunction<T,R> function)
```
    Deprecated.
    
    Return a new list of another type element, applying a function for each element.
    
    Parameters:
    
    list - list of elements to iterate
    
    function - function to apply in each element of list
    
    Returns:
    
    list of elements transformed
  - select
```
public static <T> List<T> select(List<T> list,
                                 ConditionFunction<T> function)
```
    Deprecated.
    
    Select all elements that condition returns true.
    
    Parameters:
    
    list - list of elements to iterate
    
    function - Apply in each element and select if returns true.
    
    Returns:
    
    list of elements that the condition is true.
  - reject
```
public static <T> List<T> reject(List<T> list,
                                 ConditionFunction<T> function)
```
    Deprecated.
    
    Select all elements that condition returns false.
    
    Parameters:
    
    list - list of elements to iterate
    
    function - Apply in each element and select if returns true.
    
    Returns:
    
    list of elements that the condition is false.
  - map$
```
public static <T> void map$(List<T> list,
                            MapFunction<T> function)
```
    Deprecated.
    
    Modifing list applying new value for each element.
    
    Parameters:
    
    list - values list of elements
    
    function - function to apply in each value that returns the new value
  - select$
```
public static <T> void select$(List<T> list,
                               ConditionFunction<T> function)
```
    Deprecated.
    
    Select all elements that condition returns true.
    
    Parameters:
    
    list - values list of elements
    
    function - Apply in each element and select if returns true.
  - reject$
```
public static <T> void reject$(List<T> list,
                               ConditionFunction<T> function)
```
    Deprecated.
    
    Select all elements that condition returns false.
    
    Parameters:
    
    list - values list of elements
    
    function - Apply in each element and select if returns false.
  - compact$
```
public static <T> void compact$(List<T> list)
```
    Deprecated.
    
    Remove null values in list
    
    Parameters:
    
    list - values list of elements
  - push
```
public static <T> void push(List<T> list,
                            T... ts)
```
    Deprecated.
    
    Adding multiple elements to the end of list.
    
    Parameters:
    
    list - values list of elements
    
    ts - elements to push
  - push
```
public static <T> ListHelper<T> push(List<T> list,
                                     T t)
```
    Deprecated.
    
    Adding element to the end of list.
    
    Parameters:
    
    list - values list of elements
    
    t - element to push
    
    Returns:
    
    ListHelper to chaining methods
  - at
```
public static <T> T at(List<T> list,
                       int index)
```
    Deprecated.
    
    Return the element at index. Returns null if index is out of range. Negative index counts from the end of list.
    
    Parameters:
    
    index - index of element
    
    Returns:
    
    Element at the index
  - fetch
```
public static <T> T fetch(List<T> list,
                          int index)
```
    Deprecated.
    
    Identical to 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)
```
    Deprecated.
    
    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)
```
    Deprecated.
    
    Get the first element of list.
    
    Parameters:
    
    list - list of elements
    
    Returns:
    
    the first element
  - last
```
public static <T> T last(List<T> list)
```
    Deprecated.
    
    Get the last element of list.
    
    Parameters:
    
    list - list of elements
    
    Returns:
    
    the last element
  - take
```
public static <T> List<T> take(List<T> list,
                               int n)
```
    Deprecated.
    
    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)
```
    Deprecated.
    
    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)
```
    Deprecated.
    
    Check if list is empty
    
    Returns:
    
    true if list is null or size is 0.
  - isNotEmpty
```
public static <T> boolean isNotEmpty(List<T> list)
```
    Deprecated.
    
    Check if list is not empty
    
    Returns:
    
    true if list is not null and size is greater than 0.
  - size
```
public static <T> int size(List<T> list)
```
    Deprecated.
    
    Identical to List#size()
    
    Parameters:
    
    list - the list of elements
    
    Returns:
    
    the size of list
  - count
```
public static <T> int count(List<T> list)
```
    Deprecated.
    
    Return size of list or 0 to empty list.
    
    Returns:
    
    the size of list
  - count
```
public static <T> int count(List<T> list,
                            ConditionFunction<T> function)
```
    Deprecated.
    
    Return size of list where function returns true, or 0 to empty list.
    
    Parameters:
    
    list - the list of elements
    
    function - the condition to consider element in count
    
    Returns:
    
    the size of list
  - all
```
public static <T> boolean all(List<T> list,
                              ConditionFunction<T> function)
```
    Deprecated.
    
    Returns true if all of the values in the list pass the predicate truth test
    
    Parameters:
    
    function - apply in each element and return false if one of them fail
    
    Returns:
    
    true if all elements pass on test
  - any
```
public static <T> boolean any(List<T> list,
                              ConditionFunction<T> function)
```
    Deprecated.
    
    Returns true if any of the values in the list pass the predicate truth test
    
    Parameters:
    
    function - apply in each element and return true if one of them pass
    
    Returns:
    
    true if any elements pass on test
  - reduce
```
public static <T,R> R reduce(List<T> list,
                             R initialValue,
                             ReduceFunction<T,R> function)
```
    Deprecated.
    
    Transform a list on a single value
    
    Parameters:
    
    list - list of elements
    
    initialValue - initial value of the to be returned
    
    function - the reduce function
    
    Returns:
    
    the value
    
    Since:
    
    1.2

Class _

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

_

Method Detail

each

map

transform

select

reject

map$

select$

reject$

compact$

push

push

at

fetch

fetch

first

last

take

drop

isEmpty

isNotEmpty

size

count

count

all

any

reduce