Efficient Array Processing with forEach in Node.js
In Node.js, the forEach method is used to iterate over elements in an array, performing a specified action for each element. It is a higher-order function that accepts a callback function as an argument, which executes for each array item. Unlike traditional loops, forEach does not return a value and cannot be stopped mid-way through. It is particularly useful for applying the same operation to every item in an array. Note that forEach is synchronous, meaning it processes elements sequentially and waits for the current iteration to complete before moving to the next.
This code example demonstrates how to use the forEach method to iterate over an array of numbers. The processNumber function logs each number and doubles its value. Finally, the modified array is logged to show the changes made.
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