Is there a way to verify whether a character in a string is already present in an array as an element?

Given a string, for example: data, I am looking to extract all new characters and store them in an array. Following the provided example, the desired output should be:

characters = ["d","a","t"];

My current approach is as follows:

const balanced = string => {
  var characters = [];
  var characters_Counter = 0;
  
  for (var i = 0; i < string.length; i++) {
    if (!characters.includes(string.charAt(i))){
      characters[characters_Counter] = string.charAt(i);
      characters_Counter++;
    }
    
    console.log(characters[i]);
  }
};

Within the if statement, the goal is to compare each character of string with all the elements inside characters[]. If it is a new character, then perform the actions specified within the if block. However, I am currently facing difficulties in implementing this comparison effectively.

Answer №1

One way to determine if a character is present in an array is by using the includes() method.

const checkCharacter = string => {
  var characters = [];
  var characterCount = 0;

  for (var i = 0; i < string.length; i++) {
    if (!characters.includes(string.charAt(i))) {    // <------ this line
      characters[characterCount] = string.charAt(i);
      characterCount++;
      console.log(characters[i]);
    }
  }

};

checkCharacter("example");

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