How to reference pointers in JavaScript

This article describes a method for referencing pointers in JavaScript.

Please try to complete the following cloze:

/* Create a queue with head head0, tail for tail0
/function Intlist (head0, tail0) {
    this.head = head0 | | 0;
    This.tail = Tail0 | | null;
}
/* Returns a intlist containing all the numbers in the array *
/intlist.list = function (__args) {
    var sentinel = new Intlist (),
        len = __ Args.length,
        p;
    p = Sentinel;
    for (var i = 0; i < len; i++) {
        p.tail = new Intlist (__args[i]);
        p = p.tail;
    }
    return sentinel.tail;
};
/* Returns the string representation of the object *
/IntList.prototype.toString = function () {
    var temp = "";
    temp = "[";
    for (var L = this; L!== null; L = l.tail) {
        temp = temp + "" + L.head;
    }
    temp = "]";
    return temp;
    
/** returns a intlist containing intlist A and intlist B, where
 the  elements of B are behind a. You cannot use the New keyword.
/function Dcatenate (A, B) {//
    * Completing functions/
}
    
/** returns a new Intlist, which is Len,
 *  with # The start element is the beginning (where #0 is the first element),
 *  cannot change L.
/function sublist (L, start, Len) {/
    * complete functions */
}

This is a linked list problem written in JavaScript. Because a linked list has a more complex reference operation, it can be used to examine the understanding of JavaScript references. Comes with simple test cases:

/* Test dcatenate and sublist functions correctly/function Test
() {
    var A = Intlist.list ([4,6,7,3,8]),
        B = Intlist.list ([ 3,2,5,9]);
    Dcatenate (A, B);
    if (a.tostring () = = "[4 6 7 3 8 3 2 5 9]") {
        alert ("Dcatenate function is correct.") ");
    } else{
        alert ("Dcatenate function error.) ");
    }
    var L = Intlist.list ([3,4,5,2,6,8,1,9]), result
        = Sublist (L, 3, 3);
    if (result.tostring () = = "[2 6 8]") {
        alert ("sublist function is correct. ");
    } else{
        alert ("sublist function is correct.) ");
    }
}