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R8244/node_modules/optimist/example/line_count_wrap.js
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line_count_wrap.js
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			#!/usr/bin/env node
			var argv = require('optimist')
			.usage('Count the lines in a file.\nUsage: $0')
			.wrap(80)
			.demand('f')
			.alias('f', [ 'file', 'filename' ])
			.describe('f',
			"Load a file. It's pretty important."
			+ " Required even. So you'd better specify it."
			)
			.alias('b', 'base')
			.describe('b', 'Numeric base to display the number of lines in')
			.default('b', 10)
			.describe('x', 'Super-secret optional parameter which is secret')
			.default('x', '')
			.argv
			;

			var fs = require('fs');
			var s = fs.createReadStream(argv.file);

			var lines = 0;
			s.on('data', function (buf) {
			lines += buf.toString().match(/\n/g).length;
			});

			s.on('end', function () {
			console.log(lines.toString(argv.base));
			});