Simple array list implementation in Javascript like in Java ,Only 8kb size.

When called API,as below scene:

1. index is out of bound
2. item has not unique key
3. add an reduplicated or remove unExisted item

it will fail and throw corresponding error which helps developers to catch and konw what happens

Install

  $ npm install ins-array-list --save

Usage

const ArrayList=require('ins-array-list')
const mData=[
  {
    id:1,
    name:'Alicy',
    gender:2
  },
  {
    id:2,
    name:'Anna',
    gender:2
  },
  {
    id:3,
    name:'Tom',
    gender:1
  },
]
//ArrayList(listData,unqiueKey) unqiueKey default "id"
// const mList=new ArrayList(mData)
const mList=new ArrayList(mData,'id')
//do something by api below ...

//get list data after each api operation if wanted
console.log(mList.source)
// ...more  API as below

API

.add(item)

Type:Object item

It adds item to the end of the array list

  const item={
  id:4,
  name:'Steve',
  gender:1
  }
  mList.add(item)//=>true

.add(index,item)

Type:Number index

Type:Object item

It inserts item to the index of the array list

  const item={
  id:4,
  name:'Steve',
  gender:1
  }
  mList.add(1,item)//=>true

.addAll(items)

Type:Object items

It adds all items to the array list

  const items=[
    {
    id:4,
    name:'Steve',
    gender:1
    },
    {
    id:5,
    name:'Miya',
    gender:2
    }
  ]
  mList.addAll(items)//=>true

.addAll(index,items)

Type:Number index

Type:Object items

It inserts items to the index of the array list

  const items=[
    {
    id:4,
    name:'Steve',
    gender:1
    },
    {
    id:5,
    name:'Miya',
    gender:2
    }
  ]
  mList.addAll(1,items)//=>true

.remove(index)

Type:Number index

It removes the item at index of the array list.

  //say mList.size()==5
  mList.remove(3)//=>true

.remove(item)

Type:Object item

It removes the item in the array list.

  //say mList.size()==5
  const item={
    id:4,
    name:'Steve',
    gender:1
  }
  mList.remove(item)//=>true

.removeAll(sublist)

It removes all items of sublist in the array list

  //say mList.size()==5
  const subList=[
    {
    id:1,
    name:'Alicy',
    gender:2
    },
    {
      id:3,
      name:'Tom',
      gender:1
    },
    {
      id:4,
      name:'Steve',
      gender:1
    }
  ]
  mList.removeAll(subList)//=>true

.removeIf(predicator)

Type:Function(item,index)

It removes the items that meets predicator.

  //remove then gender==1
  mList.removeIf((item,index)=>{
    return item.gender==1
  })

.sort(predicator)

Type:Function(a,b)

It sorts the items that meet the predicator.it used like normal arr.sort((index,i)=>{...}) but inner implementation is sorted by shell method,which make it sort highly efficient

  //sortBy gender:item with gender of 1 is before one with gender of 2
  mList.sort((a,b)=>{
    return a.gender-b.gender
  })

.iterate(iterator)

Type:Function(item,index)

It iterates all the elements in the array list and then do by iterator

  //sort by gender
  mList.iterate((item,index,arr)=>{
    //do something
    console.log(`item ${index}:`+item)
  })

.shuffle()

It shuffles the elements in the array list

  mList.shuffle()

.subList(formIndex, toEndIndex)

Type:Number

Type:Number

It returns new child array without change source

  //say mList.size()==5
  const newItems=mList.subList(1,3)
  console.log(newItems.length)//=>3
  mList.size()//=>5

.contains(item)

Type:Object

It returns whether the arrray list contains the item judge by the uniqueKey

  mList.contains({id:1,name:'Alicy',gender:2})//=>true

.isEmpty()

It returns whether the arrray list is empty

  mList.isEmpty()//=>false
  mList.clear()
  mList.isEmpty()//=>true

.clear()

It removes all the items in the array list.

  mList.isEmpty()//=>false
  mList.clear()
  mList.isEmpty()//=>true

.indexOf(item)

Type:Object item

It returns the index of item in the array list

  mList.indexOf({id:2,name:'Anna',gender:2})//=>1

.get(index)

Type:Number index

It gets the element at index in the array list

  mList.get(1)//=>{id:2,name:'Anna',gender:2}

.set(index,newItem)

Type:Number index

Type:Object newItem

It sets the newItem at index in the array list

  mList.set(1,{id:2,name:'Anny',gender:2})

.size()

It returns the length of the array list

  mList.size()//=>3

.source

It returns the array list

License

MIT © insonghua2.