本文實例講述了JavaScript數據庫TaffyDB用法。分享給大家供大家參考。具體如下：
TaffyDB 是一個免費開源的 JavaScript 庫，用于在 Web 上實現一個輕量級的數據訪問層，也就是一個簡單的數據庫。
數據定義：
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"]} ])查詢：
friends.find({age:{greaterthan:22}});friends.find({state:["WA","MT","ID"]});friends.find({state:["WA","MT","ID"], age:{greaterthan:22}});更新操作：
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"} ) );插入數據：
//Inserting is simple and works as you would expect:friends.insert( {name:"Brian", gender:"M", married:"No", age:52, state:"FL", favorite_foods:["fruit","steak"] });刪除：
排序：
friends.orderBy(["age",{"name":"desc"}]);var keys = new TAFFY([{name:"12abc"},{name:"abc343"},{name:"1abc"},{name:"23abc"}]);keys.orderBy({name:"logical"});forEach用法：
friends.forEach(function (f,n) {alert(f.name)});friends.forEach( function (f,n) {alert(f.name);}, {favorite_foods:{has:"pizza"}});希望本文所述對大家的javascript程序設計有所幫助。
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