Created
August 11, 2019 20:07
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Just playing around with iterators
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| class LinkedList { | |
| constructor(value) { | |
| this.value = value; | |
| this.next = null; | |
| } | |
| push(value) { | |
| let end = this; | |
| while (end.next) { | |
| end = end.next; | |
| } | |
| end.next = new LinkedList(value); | |
| } | |
| map(fn) { | |
| let i = 0; | |
| let head; | |
| let cur; | |
| for (const value of this) { | |
| const result = new LinkedList(fn(value, i)); | |
| if (!head) { | |
| head = result; | |
| cur = head; | |
| } else { | |
| cur.next = result; | |
| cur = cur.next; | |
| } | |
| } | |
| return head; | |
| } | |
| } | |
| LinkedList.fromArray = (array) => { | |
| let head = new LinkedList(array[0]); | |
| curr = head; | |
| for (let i = 1; i < array.length; i++) { | |
| curr.next = new LinkedList(array[i]); | |
| curr = curr.next; | |
| } | |
| return head; | |
| }; | |
| LinkedList.prototype[Symbol.iterator] = function* () { | |
| let head = this; | |
| yield head.value; | |
| while (head = head.next) { | |
| yield head.value; | |
| } | |
| }; | |
| // const list = LinkedList.fromArray([1,2,3,4,5]).map(n => `${n} * ${n} = ${n*n}`); | |
| // | |
| // for (const value of list) { | |
| // console.log(value); | |
| // } |
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