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JavaScript JavaScript Array Iteration Methods Array Manipulation Practice reduce()

Posted by Michelle Villagran
Michelle Villagran
228 Points

Function syntax help using reduce method

My error says I have an unexpected token of a curly brace, and I'm unsure how my syntax is wrong. The goal is to return a count of the number of phone numbers that begin with the (503) area code. Another set of eyes on this would be very helpful. Thanks.

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((count, phoneNum) => {
  if (phoneNum.startsWith('(503)') {
     return count + 1 
     }
     return count
}, 0)

console.log(numberOf503)

2 Answers

Michelle Villagran
Michelle Villagran
228 Points

Realized i needed another parens on line 9.

Dustin U
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STAFF
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Dustin U
Treehouse Teacher
Dustin U
.a{fill-rule:evenodd;}techdegree
Dustin U
Treehouse Teacher

Hey Michelle 👋🏼 Looks like a quick fix! Where your if statement starts, you're opening a parenthesis for the condition but you're not closing it. if ( phoneNum.startsWIth() {}

You're opening and closing the parenthesis for the startsWIth() method, but not the initial if statement!