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125
var assert = require('assert');
class MyLinkedList {
constructor() {
this.head = null;
this.tail = null;
}
prepend(value) {
// prepend a value
}
append(value) {
// append a value
}
toString() {
// helper method
const toPrint = [];
let currNode = this.head;
while (currNode) {
toPrint.push(currNode.val);
currNode = currNode.next;
}
return toPrint.join(' -> ');
OUTPUT
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