A Gentle Introduction to Functional JavaScript: Part 2

twoExamples2.js

var add = function(a, b) {
    return a + b;
}

var numbers = [1, 3, 5, 7, 9];
var total = 0;
for (i = 0; i < numbers.length; i = i + 1) {
    total = add(total, numbers[i]);
}
// tổng là 25

function joinWord(sentence, word) {
    return sentence + ' ' + word;
}

var words = ['sparkle', 'fairies', 'are', 'amazing'];
var sentence = '';
for (i = 0; i < words.length; i++) {
    sentence = joinWord(sentence, words[i]);
}
// 'sparkle fairies are amazing'