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JavaScript JavaScript Array Iteration Methods Array Manipulation Practice reduce()

Posted by Arthur Sirius
Arthur Sirius
9,686 Points

Array manipulation, practice reduce challenge.It keeps telling me that I changed or removed the provided code.What?

Whether I put the code on variable on line 2, or set it on line 6, same error keeps popping out.

app.js 
const phoneNumbers = ["(503) 123-4567", "(646) 123-4567", "(503) 987-6543", "(503) 234-5678", "(212) 123-4567", "(416) 123-4567"];
let numberOf503 ;

// numberOf503 should be: 3
// Write your code below
numberOf503= phoneNumbers.reduce((total,number)=>{
  if(number.startsWith('(503)')){
    return total+1;
  }
  return total;
},0);

1 Answer

Connor Walker
Connor Walker
17,985 Points

I copied and pasted your code (the part below the comments) into the challenge and it passed first time, and tried again after and it also passed so it sounds like something has gone wrong. Try copying your code under the comments, clicking the restart button and then pasting it back under the comments and seeing if that works.

Edit: the problem is here 

let numberOf503 ;

Its a very subtle change but you've added a space between the variable name and the semicolon, if you remove it you challenge will pass

Arthur Sirius
Arthur Sirius
9,686 Points

Cheers mate! Jeez,this was such a dumb miss, feels bad.