Why are my numbers not converting to Boolean?-CodePudding

so I'm solving this task where I need to return the given array after casting all numbers in it to Boolean and all strings to numbers.

My current code looks like this:

const arr = [0, "2", 3, 4, "s"];

function castArr(arr) {
  return arr.map(function(elem) {
    if (typeof elem === Number) {
      return !!elem;
  } else {
     return Number(elem)
  }
  })  
}

I have tried also using

if (typeof elem === Number) {
      return Boolean(elem)

but it still won't convert - in the result I have the same numbers (0, 3, 4).

Can you help me find the mistake here? I'm sure it's not hard, but I am kinda lost...

CodePudding user response：

Do changes as follows then it will work

const arr = [0, "2", 3, 4, "s"];

function castArr(arr) {
  return arr.map(function(elem) {
    if (typeof elem === 'number') {
      return Boolean(elem);
  } else {
     return Number(elem)
  }
  })  
}
console.log(castArr(arr))