我查找最长单词的代码不起作用

Question

    function findLongestWord(str){
  var array = str.split(" ");
  var long = array[0].length;
  for(var i = 0; i < array.length; i++){
    if(long < array[i].length){
      long = array[i];
    }
  }
  return long;
}

findLongestWord("The quick brown fox jumped over the lazy dog");

I was already given the solution to this problem; but, I wanted to know why this program does give the longest word

Answer 1

Update your code to following

• Update var long = array[0].length; to var long = array[0]; ( store value )
• In if condition, update long < to long.length < ( compare length )

 function findLongestWord(str){ var array = str.split(" "); var long = array[0]; for(var i = 0; i < array.length; i++){ if(long.length < array[i].length){ long = array[i]; } } return long; } console.log(findLongestWord("The quick brown fox jumped over the lazy dog"));

Answer 2

Try this. You have to use long.length in if block.

function findLongestWord(str){
  var array = str.split(" ");
  var long = array[0];
  for(var i = 0; i < array.length; i++){
    if(long.length < array[i].length){
      long = array[i];
    }
  }
  return long;
}

findLongestWord("The quick brown fox jumped over the lazy dog");

Answer 3

Try this one.

 findLongestWord("The quick brown fox jumped over the lazy dog"); function findLongestWord(str) { const arr = str.split(' ').map(e => e.length); const idx = Math.max(...arr); console.log(str.split(' ')[arr.indexOf(idx)]); }