Is there a way for me to retrieve the identifier of a boolean variable instead of its actual value?

Just beginning my coding journey with JavaScript and struggling to find a simple solution through online searches.

I'm attempting to locate a JavaScript function or similar method that can identify the name of a boolean in an array (not just its value) and provide it back to me. Additionally, these booleans must be stored in an array as I cannot use them as object keys for my current project requirements.

Below is a hypothetical scenario demonstrating my objective:

JavaScript:

function dinnerPreferences(){
  var isChinese = false;
  var isItalian = true;
  var isIndian = false;
  var isHomemade = true;
  var isTakeout = false;

  var dinnerOptions = [isChinese, isItalian, isIndian, isHomemade, isTakeout];
  console.log("Dinner options values: " + dinnerOptions);

  function getPreferences(){
    var wantedDinnerOptions = [];
    // Collecting true values in new array: wantedDinnerOptions
    for(i = 0; i <=dinnerOptions.length; i++){

      if(dinnerOptions[i]){
        wantedDinnerOptions.push(dinnerOptions[i]);
      }
    }
    // Accessing boolean values:
    console.log("Confirming true values: " + wantedDinnerOptions);
    // Finding the length of true values:
    console.log("Length of true values: " + wantedDinnerOptions.length)
    // Attempting to retrieve boolean NAMES(???):
    console.log("Struggling to use Object.keys(). Any other ideas?");
  }
  getPreferences();
}
  dinnerPreferences();

Answer №1

If you want to make your dinnerOptions array more structured, consider transforming it into an array of objects for better organization. This way, each item in the array can be more meaningful and usable when represented as an object.

function dinnerPreferences() {
  const dinnerOptions = [
    { type: "Chinese", availability: false },
    { type: "Italian", availability: true },
    { type: "Indian", availability: false },
    { type: "Homemade", availability: true },
    { type: "Takeout", availability: false },
  ];
  console.log(
    "All dinner options values: " + dinnerOptions.map((opt) => opt.type)
  );

  function getPreferences() {
    const wantedDinnerOptions = [];
    for (let i = 0; i < dinnerOptions.length; i++) {
      if (dinnerOptions[i].availability) {
        wantedDinnerOptions.push(dinnerOptions[i].type);
      }
    }
    console.log("Available dinner options: " + wantedDinnerOptions);
  }
  getPreferences();
}

dinnerPreferences();

Additionally, ensure that the condition for the for loop is correct by using strict inequality for i compared to dinnerOptions.length. It's recommended to use let and const instead of var.

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