Tips for comparing an array against a string and increasing a variable based on the outcome

Question

Tips for comparing an array against a string and increasing a variable based on the outcome

I am currently working on a Javascript code snippet that aims to find specific strings in an array.

  var test = ['hello', 'my', 'name'];

  for (var i = 0; i < data.length; i++) {
    if (test === "name") {
      //In the array!
      ct = "found";
    } else {
      ct = "not found";
    }
  };

The main goal here is to iterate through an array of results, let's say 100 items in total, and check whether the variable test includes the string 'name' or not.

After running this code snippet, I checked the console log and realized that it always displays the value of ct as 'not found'.

This piece of code is essential for determining how many occurrences of a specific string defined by test can be found within an array.

javascript arrays

Answer 1

Answer №1

If you're looking to simply determine if an item exists, you can do so by using:

var test = ["hello","my","name"];
var element = "hello";
var index = test.indexOf(element);

if(index != -1){
     //The item exists
     console.log(element + " exists at index " + index);
}else{
    //The item doesn't exist
    console.log(element + " doesn't exist in the array");
}

If you prefer to iterate through the array:

  var test = ['hello', 'my', 'name'];
  var name = "hello";
  var ct = null;

  for (var i = 0; i < data.length; i++) {
    if (test[i] === name ) {
      //Item found in the array!
      ct = "found";
      break; // exit the loop once item is found
    } else {
      ct = "not found";
    }
  };
  console.log(ct);

Answer 2

If you're looking to simply determine if an item exists, you can do so by using:

var test = ["hello","my","name"];
var element = "hello";
var index = test.indexOf(element);

if(index != -1){
     //The item exists
     console.log(element + " exists at index " + index);
}else{
    //The item doesn't exist
    console.log(element + " doesn't exist in the array");
}

If you prefer to iterate through the array:

  var test = ['hello', 'my', 'name'];
  var name = "hello";
  var ct = null;

  for (var i = 0; i < data.length; i++) {
    if (test[i] === name ) {
      //Item found in the array!
      ct = "found";
      break; // exit the loop once item is found
    } else {
      ct = "not found";
    }
  };
  console.log(ct);

Tips for comparing an array against a string and increasing a variable based on the outcome

Answer №1

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