<3 ES6

applyFirst.es6

export default function applyFirst (fn, first) {
  return (...args) => fn(first, ...args);
}

applyFirst.js

function variadic(fn) {
  if (fn.length < 1) return fn;

  return function() {
    var ordinaryArgs = (1 <= arguments.length ? __slice.call(arguments, 0, fn.length - 1) : []),
        restOfTheArgsList = __slice.call(arguments, fn.length - 1),
        args = (fn.length <= arguments.length ? ordinaryArgs.concat([restOfTheArgsList]) : []);
    
    return fn.apply(this, args);
  }
};

module.exports = function applyFirst(fn, first) {
  return variadic(function (args) {
    return fn.apply(this, [first].concat(args))
  })
}

usage.es6

import applyFirst from './applyFirst'

function greet(me, you, them) {
  return `Hello, ${ you } and ${ them }, my name is ${ me }`;
}

const chrisGreets = applyFirst(greet, 'Chris');

chrisGreets('Nathan', 'everyone else');
// => "Hello, Nathan and everyone else, my name is Chris"