I’ll explain you how to find a certain element’s index in a JavaScript array in this blog post. This technique covers edge situations, like the element not being found, and is easy to use.
With an in-depth and optimised code sample, you will gain insights into improving your array search logic regardless of your level of experience as a developer.
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// Defining an array of numbers
const numbers = [12, 34, 23, 64, 23, 56, 24];
// Element to search for within the array
let searchElement = 23;
function findElement(numbers, searchElement) {
// Get the length of the array to avoid recalculating it in the loop
const length = numbers.length;
// Iterate through the array to find the element
for (let i = 0; i < length; i++) {
// Check if the current element matches the searchElement
if (searchElement === numbers[i]) {
// Return the index of the found element
return i;
}
}
// Return undefined if the element is not found (optional, implicitly returns undefined otherwise)
return undefined;
}
// Call the function and store the index of the element
let index = findElement(numbers, searchElement);
// Check if the element was found and log the result
if (index !== undefined) {
console.log(`${searchElement} is found at index ${index}`);
} else {
console.log(`${searchElement} is not found in the array.`);
}
Happy Coding!
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