JavaScript arrayToList

Question

can anyone help me figure what i did wrong in my code? Cause I wanna created a function which can help me turn all the array data into list and print the list out.

Original Instructions ****Write a function arrayToList that builds up a data structure like the previous one when given [1, 2, 3] as argument, and write a listToArray function that produces an array from a list. Also write the helper functions prepend, which takes an element and a list and creates a new list that adds the element to the front of the input list, and nth, which takes a list and a number and returns the element at the given position in the list, or undefined when there is no such element. If you haven’t already, also write a recursive version of nth.****

function arrayToList(arrayx){
for(var i=10;i<arrayx.length;i+=10)
var list = {
 value: i,
 rest: {
   value: i+=10,
   rest: null}}
return list;
}

The Results I wanna have is

console.log(arrayToList([10, 20]));

// → {value: 10, rest: {value: 20, rest: null}}

as @Erazihel said, i find this really complicated. Could you tell us what's the final usecase of the list ? — Okazari
– Okazari, Commented Aug 23, 2017 at 9:59
Ohhhh....Well, here is the original contents of the exercise: — A.Kao
– A.Kao, Commented Aug 23, 2017 at 10:05
@Okazari I have added some original instructions in the question, Does that help? — A.Kao
– A.Kao, Commented Aug 23, 2017 at 10:09

jANVI · Accepted Answer · 2017-08-23 10:18:01Z

2

You may try this as well :

    
    
    function arrayToList(arrayx){ 
    for(var i = arrayx[0];i < Math.max.apply(Math,arrayx); i+=arrayx[0])
    {
     var list = {
     value: i,
     rest: {
     value: i+=10,
     rest: null
       }
      }
    return list;
    }
    }
    
    console.log(arrayToList([10 , 20]));

edited Aug 23, 2017 at 10:18

answered Aug 23, 2017 at 10:14

jANVI

7483 silver badges12 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

A.Kao Over a year ago

May I ask what the "Math.max.apply" is?

jANVI Over a year ago

To find max value from array. cannot use array.length because as per your e.g your array length will be 2 or 3 but first array element is 10 so loop condition will never satisfy

jANVI Over a year ago

will really appreciate if you can upvote and accept it as answer if this helped you

A.Kao Over a year ago

Sure, i will do that!

l.g.karolos · Accepted Answer · 2017-08-23 09:55:13Z

    // This is a function to make a list from an array
    // This is a recursive function
    function arrayToList(array) {
        // I use an object constructor notation here
        var list = new Object();
        // This is to end the recursion, if array.length == 1, the function won't call itself and instead
        // Just give rest = null
        if (array.length == 1) {
            list.value = array[array.length - 1];
            list.rest = null;
            return list;
        } else {
            // This is to continue the recursion.  If the array.length is not == 1, make the rest key to call arrayToList function
            list.value = array[0];
            // To avoid repetition, splice the array to make it smaller
            array.splice(0,1);
            list.rest = arrayToList(array);
            return list;
        }
    }
    
    
console.log(arrayToList([10, 20]));

Collectives™ on Stack Overflow

JavaScript arrayToList

2 Answers 2

4 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related