What is the best way to delete a specific character by its index in JavaScript?

My current challenge lies in finding the correct JavaScript method to achieve a specific task. I need to go through each character of a string (all lowercase) while eliminating only the ith character.

For example, if I have the string abc, the desired output after iteration would be:

'bc' //0th element removed
'ac' //1st element removed
'ab' //2nd element removed

I initially attempted using the replace method but faced issues with strings containing duplicate characters.

An attempt looked like this:

str = 'batman';
for(var i = 0; i < str.length; i++){
var minusOneStr = str.replace(str[i], '');
console.log(minusOneStr);
}
"atman"
"btman"
"baman"
"batan"
"btman" //needed result is batmn
"batma"

I discovered that the replace method couldn't handle multiple instances of a character within the same string - it would only replace the first occurrence. I also explored methods such as substring, splice, and slice, but none seemed suitable for my requirements.

How can I approach this problem more effectively?

Answer №1

Instead of utilizing the .replace() method, you can simply combine slices of the string before and after the current index.

var str = 'superman';

for (var i = 0; i < str.length; i++) {
  var minusOneStr = str.slice(0, i) + str.slice(i + 1);
  console.log(minusOneStr);
}

This approach is necessary because, as you rightly pointed out, .replace() will only substitute the first instance of a given string it encounters.

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