collardeau

const pipe = require("ramda").pipe;   // node or webpack/browserify

const firstInitial = pipe(getFirstName, getFirstLetter);

collardeau

const getFirstName = person => person.split(" ")[1]; // second word
const getFirstLetter = string => string[0];   // first letter

const getFirstInitial = person => {
 return getFirstLetter(getFirstName(person));   // nested function!
}

// try it
getFirstInitial("Doc Emmett Brown");  // "E"