Sample for underscore.js's wrap function node wrap-demo.js

wrap-demo.js

var _ = require('underscore');

var niceAlert = _.wrap( console.log, function() {
	var args = _.toArray(arguments);
	var fn = _.first(args);
	var rest = _.rest(args);

	rest = _.map(rest, function(s) {
		if (s === 'f*ck') s = 'Well';
		return s;
	});

	fn.apply(this, rest);
} );

niceAlert('f*ck');