samples1.js

var numbers = [1,2,3,4,5,6,7,8,9,0,11];

var gt5 = _.select(numbers, function (x) { return x > 5; });
// gt5 = [6,7,8,9,11]

var squares = _.map(numbers, function (x) { return x * x; });
// squares = [1,4,9,16,25,36,49,81,0,121]

var product = _.reduce(gt5, function (a,b) { return a * b; } , 1);
// product = 33264