Created
April 3, 2018 10:09
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function LinkedList () { | |
let Node = function (element) { | |
this.element = element | |
this.next = null | |
} | |
let length = 0 | |
let head = null | |
this.append = function (element) { | |
let node = new Node(element) | |
let current | |
if (head === null) { | |
head = node | |
} else { | |
current = head | |
while (current.next) { | |
current = current.next | |
} | |
current.next = node | |
} | |
length++ | |
} | |
this.removeAt = function (position) { | |
if (position > -1 && position < length) { | |
let current = head | |
let previous | |
let index = 0 | |
if (position === 0) { | |
head = current.next | |
} else { | |
while (index++ < position) { | |
previous = current | |
current = current.next | |
} | |
previous.next = current.next | |
} | |
length-- | |
return current.element | |
} | |
} | |
this.insert = function (position, element) { | |
if (position >= 0 && position <= length) { | |
let node = new Node(element) | |
let current = head | |
let previous = null | |
let index = 0 | |
if (position === 0) { | |
node.next = current | |
head = node | |
} else { | |
while (index++ < position) { | |
previous = current | |
current = current.next | |
} | |
node.next = current | |
previous.next = node | |
} | |
length++ | |
return true | |
} else { | |
return false | |
} | |
} | |
this.toString = function () { | |
let current = head | |
let string = '' | |
while (current) { | |
string += `${current.element}${current.next ? ',' : ''}` | |
current = current.next | |
} | |
return string | |
} | |
} | |
// const myLinkedList = new LinkedList() | |
// myLinkedList.append('react') | |
// myLinkedList.append('node') | |
// myLinkedList.append('react native') | |
// console.log(myLinkedList.toString()) |
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