TypeError: string.split is not a function

Question

I'm solving an exercise problem. Solved it in Visual Studio (it worked), copied the solution to the browser (Codewars challenge) and it returned this error:

TypeError: string.split is not a function
   at bulk
    at _
    at begin
    at it
        at /runner/frameworks/javascript/cw-2.js:159:11
    at Promise._execute
    at Promise._resolveFromExecutor
    at new Promise
    at Object.describe
            at Object.handleError
        at ContextifyScript.Script.runInThisContext
    at Object.exports.runInThisContext

Here's my code:

 function bulk(string) { var arr = string.split(", "); var whatYouAte = []; for (var i = 0; i < arr.length; i++) { arr[i] = arr[i].replace(/g /g, ' '); whatYouAte.push(arr[i].split(" ")); } var proteins = 0; var calories = 0; console.log(whatYouAte); for (var j = 0; j < whatYouAte.length; j++) { var foodAmount = whatYouAte[j][0]; var foodName = whatYouAte[j][1]; var foodProteinKcal = food[foodName][0]; var foodCarbKcal = food[foodName][1]; var foodFatKcal = food[foodName][2]; proteins += foodAmount / 100 * foodProteinKcal; calories += foodAmount / 100 * (foodProteinKcal + foodCarbKcal + foodFatKcal); } return "Total proteins: " + proteins + " grams, Total calories: " + calories + "."; } 

I think I once had a similar problem and solved it by making this.split(), but now this doesn't work (Codewars doesn't accept, returns "TypeError: this.split is not a function"). Thanks!

Answer 1

If you are getting a number you can use the .toString() method.

I'm using something like this:

if (typeof string === 'number') {
    string = num.toString();
}

First, use the typeof operator to check if it's a number. Then use the .toString method to change it to a string. Hope it helps :)

Answer 2

If you call .split() on something other than a string, the JS runtime won't find the .split() method for that type. Make sure you are passing a string to your function.

Here's an example:

 var result = "Scott Marcus".split(" "); console.log(result); // ["Scott", "Marcus"] var value = 42 value.split("4"); // ERROR: split is not a function