Pick random lines from a text document

JavaScript version

const randomLines = (str, count) => str.split(/\r?\n/).reduce((p, _, __, arr) => (p[0] < count ? [p[0] + 1, p[1].concat(arr.splice((Math.random() * arr.length) | 0, 1))] : p), [0, []])[1];

Examples

randomLines(
    `one
two
three
four
five`,
    2
);

// ['one', 'four']