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// one-liner to build a sequence of numbers
// source: http://ariya.ofilabs.com/2013/01/es6-and-array-comprehension.html

Array.apply(0, Array(3)).map(function(x, y) { return y }); // [0, 1, 2]

// one-liner to filter elements
// source: http://ariya.ofilabs.com/2013/01/es6-and-array-comprehension.html

[1,4,2,3,-8].filter(function(i) { return i < 3 }); // [1, 2, -8]