Abbreviate a two word name: https://www.codewars.com/kata/abbreviate-a-two-word-name

solution.js

// Boring.
function abbrevName(name) {
  [first, last] = name.toUpperCase().split(' ');
  return first[0] + '.' + last[0];
}


// Chain them method calls!
function abbrevName(name) {
  return name.toUpperCase()
             .split(' ')
             .map(x => x[0])
             .join('.');
}


// REDUCE.
// (Don't do this in real life.)
function abbrevName(name) {
  return name.toUpperCase()
             .split('')
             .reduce((res, x, i) => res + (name[i - 1] === ' ' ? '.' + x[0] : ''));
}

solution.py

# First, a very procedural approach.
def abbrevName(name):
    first, last = name.upper().split(' ')
    f = first[0]
    l = last[0]
    return f + '.' + l



# Now, a more compact one-liner. Less repetetion but also harder to read.
def abbrevName(name):
    return '.'.join([x[0] for x in name.split(' ')]).upper()