My first functional programming code. While doing a Restful API project, I managed to be able to write a very simple functional piece of code by myself. It was a really good feeling for me, given the fact that I was struggling so much at understanding the basics functional programming.

first_functional_code.js

const trimmed_file_names = data.filter((file_name)=>{
  return file_name.indexOf('.log') > -1 || ( include_compressed_logs && file_name.indexOf('.gz.b64') > -1);
}).map((file_name)=>{
  if(file_name.indexOf('.log') > -1){
    // Remove .log extension
    return file_name.replace('.log','');
  }

  // Add on the .gz files
  if(file_name.indexOf('.gz.b64') > -1 && include_compressed_logs){
    return file_name.replace('.gz.b64','')
  }
});