Is there a way for me to compare a string A1 with a value A2 located in index 0 within an array of values?

Question

Is there a way for me to compare a string A1 with a value A2 located in index 0 within an array of values?

In my current task, I am attempting to compare two sets of strings: A1 must match A2 when selected. However, if A1 is chosen along with B1, C1, or D1, the comparison should return false. Similarly, selecting B1 should result in a match with only B2, while A2, C2, and D2 should be considered incorrect.

To clarify this further, let's assume we have two arrays: {"A1", "B1", "C1", "D1", "E1"} {"A2", "B2", "C2", "D2", "E2"}

For example, if "A1" and "B2" are selected from dropdown menus, if arr[0] does not equal arr2[0], the comparison should return false.

I am currently unsure about the method to compare an index value between two separate arrays.

Thank you for your assistance.

javascript arrays

Answer 1

Answer №1

let dropdown1 = document.querySelector("#select1");
let dropdown2 = document.querySelector("#select2");
let output = document.querySelector("#result");

dropdown1.addEventListener("change", handleChange);
dropdown2.addEventListener("change", handleChange);

let optionsArray1 = ["A1", "B1", "C1", "D1", "E1"];
let optionsArray2 = ["A2", "B2", "C2", "D2", "E2"];

for (let index in optionsArray1) {
  let option = document.createElement("option");
  option.textContent = optionsArray1[index];
  option.value = index;
  dropdown1.appendChild(option);
}

for (index in optionsArray2) {
  option = document.createElement("option");
  option.textContent = optionsArray2[index];
  option.value = index;
  dropdown2.appendChild(option);
}

function handleChange() {
  output.value = dropdown1.value === dropdown2.value;
}

handleChange();

<select id="select1"></select>
<select id="select2></select>
<label for="result">Result:</label>
<input type="text" name="result" id="result" readonly />

Answer 2

let dropdown1 = document.querySelector("#select1");
let dropdown2 = document.querySelector("#select2");
let output = document.querySelector("#result");

dropdown1.addEventListener("change", handleChange);
dropdown2.addEventListener("change", handleChange);

let optionsArray1 = ["A1", "B1", "C1", "D1", "E1"];
let optionsArray2 = ["A2", "B2", "C2", "D2", "E2"];

for (let index in optionsArray1) {
  let option = document.createElement("option");
  option.textContent = optionsArray1[index];
  option.value = index;
  dropdown1.appendChild(option);
}

for (index in optionsArray2) {
  option = document.createElement("option");
  option.textContent = optionsArray2[index];
  option.value = index;
  dropdown2.appendChild(option);
}

function handleChange() {
  output.value = dropdown1.value === dropdown2.value;
}

handleChange();

<select id="select1"></select>
<select id="select2></select>
<label for="result">Result:</label>
<input type="text" name="result" id="result" readonly />

Is there a way for me to compare a string A1 with a value A2 located in index 0 within an array of values?

Answer №1

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