Is it common practice to include a variable in a function with the same name as the function itself?

Is it common practice to use a variable with the same name as the function within the function itself?

const sum = function(arr) {
  let sum = 0;
  for(let i = 0; i < arr.length; i++)
    sum += arr[i]; 
  return sum;
};
Although this code runs smoothly without any warnings, I'm wondering if this practice could potentially cause any issues?

Answer №1

It's not advisable to use the same variable name for different purposes. This practice can lead to confusion and errors in your code.

In the scenario provided, there may not be an immediate problem. However, if you decide to transform the function into a recursive one in the future, using the same variable name could cause issues. Attempting to call sum from within itself would result in an error because the inner variable sum would be referenced instead of the function. While this may not be a critical issue, it's better to write code that is robust and less prone to unexpected errors down the line. Future changes to your code could lead to unforeseen complications.

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