basic decorator examples

decorators.js

function timeIt(func) {
  return async (...args) => {
    const start = new Date();
    const output = await func(...args);
    
    console.log(`${func.name} took ${(new Date() - start) / 1000} s`);   
    return output; 
  }
}

const sleep = async (seconds) => new Promise(resolve => setTimeout(seconds * 1000, resolve));

async function myFunc() {
  await sleep(2);
  return true;
}
myFunc = timeIt(myFunc);

// run it
(async () => {
  await myFunc();
})();

decorators.py

from time import sleep, time


def time_it(func):
    def run(*args, **kwargs):
        start = time()
        output = func(*args, **kwargs)
        print(f'{func.__name__} took {time() - start} s')
        return output
        
    return run
    

@time_it
def my_func():
    sleep(2)
    return True
  
    
my_func()  # run it