Javascript array lengh giving 1 if null.I am using Split function.
var str = '';
var arr = str.split(',');
alert(arr.length);
**Output:1**
When there is any value in string counting correctly
var str = 'a,b,c';
var arr = str.split(',');
alert(arr.length);
****Output:3****
An empty string isn't a null value. And String.prototype.split splits a string into array indexes when it finds the separator character. In your empty string, there's a single string. Therefore, you get an array length of 1.
var totalLength = array.reduce(function(result, str) { result += str.length; return result; }, 0);when you do var arr = str.split(','); the returned array is not null. It has one element and that value has space in it. So when you do arr.length - it will return 1 as it has one element and that element is space " ".
Hope it helps. Happy Learning :)
falsyin JS, you will run the else statement when the string is empty returning an empty array.