Click here to Skip to main content
15,558,870 members
Please Sign up or sign in to vote.
0.00/5 (No votes)
See more:
I am trying to create an array called lengths which will have all the lengths of the elements in the array new_str.
The problem is when I am trying to push each length to the lengths array it says
‘Cannot read property ‘length’ of undefined’.
PS : My plan is to use Math.max() inorder to find the maximum length of the string in the array.


What I have tried:

JavaScript
function findLongestWordLength(str) {
var new_str = str.trim().split(" ");
var lengths = [];
for(var i=0; i <= new_str.length; i++){
lengths.push(new_str[i].length);
}
console.log(lengths);
}

findLongestWordLength("The quick brown fox jumped over the lazy dog");
Posted
Updated 13-Jul-20 3:33am

Two things:
1) The problem you have noticed is due to your loop:
JavaScript
for(var i=0; i <= new_str.length; i++){
Indexes run from 0 to N - 1, where N is the number of element in the array. You are trying to access 0 to N inclusive, so one of them does not have a value and you get an error.

2) Why do it like that? Just have a MaxValue integer, preset it to the first index value, and compare it to the current length each time round the loop. Why waste time and memory building a array you only use once?
 
Share this answer
 
It is failing because your loop is going beyond the end of the array. Array indices go from zero to the length of the array - 1. So you need to change your for loop test expression as follows:
JavaScript
for(var i=0; i < new_str.length; i++){ 
 
Share this answer
 

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)



CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900