Intermediate Algorithm Scripting - DNA Pairing

JavaScript
1

Why does this not work?

Your code so far

function pairElement(str) {
  let newArr=[]
  let newArr1=[]
  for (let i=0;i<=str.length;i++)
  if(str[i]==="A"||"T") {
newArr.push(str[i])
return newArr
  }
  for (let j=0;j<=str.length;j++)
  if(str[j]==="G"||"C"){
newArr1.push(str[j])
return newArr1
  }

}

console.log(pairElement("GCG"));

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Challenge: Intermediate Algorithm Scripting - DNA Pairing

Link to the challenge:

2

What does your output look like when you run a test case?

We can work backwards from there.

3

Thanks.
It just says
[ ‘G’ ]

4

So you have two problems.

  1. you are pushing one letter instead of a pair of letters

  2. you are stopping after the first letter of the input

1 Like
5

Okay I’ll try and understand the solution

6

You shouldn’t copy the answer. That doesn’t help you learn how to code. That only helps you read other people’s answers.

Look at the issues one at a time.

How can you fix the fact that you are only pushing one letter instead of two?