Chunky Monkey - works but it doesn't

JavaScript
1

Tell us what’s happening:
Hello everyone!
This code is working if I put it into an html and test it in the browser, but it’s showing me “TypeError: cannot set property ‘counter’ of undefined”.

Could anyone tell my why is this?

Thank you in advance
Alex

Your code so far

    this.counter = size;
    console.log('counter is: ' + size);
  // initialize the final 2D arr
    var finalArr = [];
    //loop through it every 'counter' item
    for (var i = 0; i < arr.length; i+=counter) {
        console.log('i= ' + i); //just for me to check
        var sliceArr = arr.slice(i, size);
        finalArr.push(sliceArr);
        size *=2;
        console.log('sliceArr= ' + sliceArr); //just for me to check 
    }
    console.log(finalArr); //just for me to check
  return finalArr;
}

chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 4);```
**Your browser information:**

Your Browser User Agent is: ```Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3230.0 Safari/537.36```.

**Link to the challenge:**
https://www.freecodecamp.org/challenges/chunky-monkey
2

What does this.counter mean in this context?

Are you sure you want to use that?

3

I believe that fcc runs the challenges in strict mode under the hood; in strict mode, if this was not defined by the execution context, it remains undefined.

But it’s hard to tell just by looking at a partial code.

5

i wanted to create n’th variable called counter - so that the loop would iterate through the initial array every counter’th item

6

it’s not partial, it’s just missing the function declaration, this is how it was imported here

function chunkArrayInGroups(arr, size) {
7

Ok so the problem was with this.counter = i changed it to var counter = and it’s all good.

Thank you!
Alex

1 Like