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    <p>You can create User objects with userId and connectionTimes properties and add them to an array of Users like this:</p> <pre><code>function createUsers() { var users = []; users[0] = { userId: 1, connectionTimes: [ {onlineTime:"11:10:30", offlineTime:"11:18:12"}, {onlineTime:"11:14:14", offlineTime:"11:52:41"} ] } users[1] = { userId: 2, connectionTimes: [ {onlineTime:"8:08:14", offlineTime:"1:15:00"} ] } return users; } </code></pre> <p>Once you have an array of users, you can iterate through it and find a user by comparing the userId property:</p> <pre><code>var users = createUsers(); for (var i=0;i&lt;users.length;i++) { if (users[i].userId === 2) { for (var j=0;j&lt;users[i].connectionTimes.length;j++) { alert("onlineTime: " + users[i].connectionTimes[j].onlineTime + ", " + "offlineTime: " + users[i].connectionTimes[j].offlineTime); } } } </code></pre> <p><strong>EDIT</strong></p> <p>Here's a decomposed version of the code, based on a createUser and getConnectionTime function:</p> <pre><code>function getConnectionTime(onTime, offTime) { return {onlineTime: onTime, offlineTime: offTime}; } function createUser(uid, connTimes) { return {userId: uid, connectionTimes: connTimes}; } var users = []; var connTimes = []; connTimes.push(getConnectionTime("11:10:30", "11:18:12")); connTimes.push(getConnectionTime("11:14:14", "11:52:41")); users.push(createUser(1, connTimes)); connTimes = []; connTimes.push(getConnectionTime("8:08:14", "1:15:00")); users.push(createUser(2, connTimes)); for (var i=0;i&lt;users.length;i++) { if (users[i].userId === 2) { for (var j=0;j&lt;users[i].connectionTimes.length;j++) { alert("onlineTime: " + users[i].connectionTimes[j].onlineTime + ", " + "offlineTime: " + users[i].connectionTimes[j].offlineTime); } } } </code></pre>
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    1. POHow create and read javascript object for save the following data structure?
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    1. COWhen I need to generate userid and times dynamically. How I can read the time from the user with id 2?
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    2. COThis is very good! Could you please show me: How to dynamically generate this object? : `users[0] = { userId: 1, connectionTimes: [ {onlineTime:"11:10:30", offlineTime:"11:18:12"}, {onlineTime:"11:14:14", offlineTime:"11:52:41"} ] }`
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    3. COThat depends on how you generate the userId and connectionTimes. From where are you getting/generating these values?
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