JavaScript database Taffydb Usage Example Analysis _javascript skills

This example describes the use of JavaScript database Taffydb. Share to everyone for your reference. Specifically as follows:

Taffydb is a free and open source JavaScript Library for implementing a lightweight data access layer on the WEB, a simple database.

Data definition:

var friends = new Taffy (
[
{name: "Bob",
 Gender: "M",
 married: "No",
 age:25, State
 : "NY",
 favorite_foods:["Pizza", "Tacos"]},
 {name: "Joyce",
 Gender: "F",
 married: "No",
 age:29,
 State: "WA",
 favorite_foods:["salad", "cheese Sticks"]},
 {name: "Dan",
 Gender: "M",
 married: "No ",
 age:29, State
 :" MT ",
 favorite_foods:[" pizza "," hamburgers "," BLTs "]},
 {name:" Sarah ",
 Gender: "F",
 married: "No",
 age:21, State
 : "ID",
 favorite_foods:["pizza", "Sushi"}
 ]
)

Inquire:

Friends.find ({age:{greaterthan:22}});
Friends.find ({state:["WA", "MT", "ID"]});
Friends.find ({state:["WA", "MT", "ID"],
       age:{greaterthan:22});

Update action:

Friends.update (
  {State
  : "CA",
  married: "Yes"
  },
  {
  name: "Joyce"
  }
  );
Friends.update ({state: "CA", married: "Yes"},1);
Friends.update (
  {State
  : "CA",
  married: "Yes"
  },
  Friends.find (
    {name: "Joyce"}
    )
  );

Insert data:

Inserting is simple and works as your would expect:
Friends.insert (
  {name: "Brian",
  Gender: "M",
  Married: "No",
  age:52, State
  : "FL",
  favorite_foods:["fruit", "steak"]
  };

Delete:

Copy Code code as follows:

Friends.remove ({name: "Brian"});

Sort:

Friends.orderby (["Age", {"name": "DESC"}]);
var keys = new Taffy ([
{name: "12abc"},
{name: "abc343"},
{name: "1abc"},
{name: "23ABC"}
]);
Keys.orderby ({name: "logical"});

foreach Usage:

Friends.foreach (function (f,n) {alert (f.name)});
Friends.foreach (
  function (f,n) {alert (f.name);},
  {favorite_foods:{has: "Pizza"}}
);

I hope this article will help you with your JavaScript programming.