Mexican Wave

Description

Rules
1. The input string will always be lower case but maybe empty.
2. If the character in the string is whitespace then pass over it as if it was an empty seat
Example
wave("hello") => ["Hello", "hEllo", "heLlo", "helLo", "hellO"]

My answer

function wave(str){
  let result = [];
  
  for (let i = 0; i < str.length; i++) {
    if (str[i] === ' '){
      continue;
    } else {
      result.push(str.slice(0, i) + str[i].toUpperCase() + str.slice(i+1))
    }
  }
  
  return result;
}

Other solutions

function wave(str){
    let result = [];
    
    str.split("").forEach((char, index) => {
        if (/[a-z]/.test(char)) {
            result.push(str.slice(0, index) + char.toUpperCase() + str.slice(index + 1));
        }
    });
    
    return result;
}

var wave=w=>[...w].map((a,i)=>w.slice(0,i)+a.toUpperCase()+w.slice(i+1)).filter(a=>a!=w)

const wave = str => 
  [...str].map((s, i) => 
      str.slice(0, i) + s.toUpperCase() + str.slice(i + 1) 
  ).filter(x => x != str);