To get the first letter of a string in Javascript, the .charAt() method can be used. Alternatively, the first character of a string can be accessed using square bracket notation with the first index (e.g. "test string"[0])

How to get the first letter of a string in JavaScript

Binary search is a 'divide and conquer' algorithm that finds the position of a specified input value within a sorted array. With a Big-O runtime of O(log n), it is an efficient way to search large sorted arrays.

Binary Search in JavaScript

The useCallback() hook is a function provided by React which can help boost performance by preventing unnecessary component re-renders. It is especially useful when you have a function that is being passed to multiple child components. However, optimizations do not come for free and useCallback() should be used carefully.

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How to get the first letter of a string in JavaScript

Published Apr 11 2022

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