sparklines.js

sparklines.js

var data, ticks;

ticks = ['▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'];

exports.clark = function(data) {
  var m, n, t;
  m = Math.min.apply(Math, data);
  n = (Math.max.apply(Math, data) - m) / (ticks.length - 1);
  return ((function() {
    var i, len, results;
    results = [];
    for (i = 0, len = data.length; i < len; i++) {
      t = data[i];
      results.push(ticks[(t - m) / n >> 0]);
    }
    return results;
  })()).join('');
};

if (require.main === module) {
  data = process.argv.map(function(a) {
    return parseInt(a, 10);
  }).filter(function(v) {
    return v === v;
  });
  process.stdout.write((exports.clark(data)) + "\n");
}