fine mongodb like text code example

Example 1: mongodb find like

db.users.find({"name": /.*m.*/});

db.users.find({"name": /m/});

Items.find({"description": {$regex: ".*" + variable + ".*"}}).fetch();

Example 2: contains mongo-query string

db.users.findOne({"username" : {$regex : ".*son.*"}});