Introduction to Meteor at ChaDev Lunch
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An introduction to Meteor, the javascript framework for efficiently deploying your applications, as given at the Chattanooga Developer's Lunch on July 3rd, 2014. During the presentation, I try to put together a clone demo of GoogleDocs to exhibit the capabilities of Meteor!
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// and the following would be incorrect:
// elem.style.webkitBorderRadius
// Webkit ghosts their properties in lowercase but Opera & Moz do not.
// Microsoft foregoes prefixes entirely elements in IE6-9 are considered 'NoScope' elements and therefore will be removed
// when injected with innerHTML. To get around this you need to prepend the 'NoScope' element
// with a 'scoped' element, in our case the soft-hyphen entity as it won't mess with our measurements.
// http://msdn.microsoft.com/en-us/library/ms533897%28VS.85%29.aspx
style = ['', ''].join('');
div.id = mod;
div.innerHTML += style;
docElement.appendChild(div);
ret = callback(div, rule);
div.parentNode.removeChild(div);
return !!ret;
},
// adapted from matchMedia polyfill
// by Scott Jehl and Paul Irish
// gist.github.com/786768
testMediaQuery = function( mq ) {
if ( window.matchMedia ) {
return matchMedia(mq).matches;
}
var bool;
injectElementWithStyles('@media ' + mq + ' { #' + mod + ' { position: absolute; } }', funct ...
AngularJS Basics with Example
This document provides a summary of the AngularJS framework. It discusses the following key points in 3 sentences:
1. AngularJS aims to make HTML better suited for building applications by teaching the browser new syntax like directives. This allows more of the application logic to be handled in the declarative HTML instead of JavaScript code.
2. Angular follows an MVC pattern where the controller contains the business logic and data, the view displays the data through bindings, and the scope acts as a synchronization mechanism between the model and view.
3. Features like data binding, directives, dependency injection and routing allow building dynamic and interactive single-page applications by synchronizing the model and view through declarative templates and separating concerns
前端概述
The document provides an overview of front-end technologies including HTML, CSS, JavaScript, Ajax and jQuery. It discusses how the front-end interacts with the user's browser and backend servers. It describes the roles of HTML, CSS and JavaScript in content, styles and behaviors. It then covers HTML tags and structures, CSS, JavaScript basics and its use in browsers with BOM and DOM APIs. The document also summarizes Ajax and how it enables asynchronous JavaScript requests, and introduces jQuery and how it simplifies DOM and Ajax operations.
Meteor Day Talk
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JavaScript front end performance optimizations
No one wants a slow loading, slow reacting application. As page weight has increased so has the dependency on JavaScript to drive rich user experiences. Today many pages load over 2MBs of JavaScript, but is this healthy? Do your scripts and dependencies perform well? In this session we will review common JavaScript performance bottlenecks, how to detect them and how to eliminate them.
This session will review common bad coding syntax, architecture and how to replace them with better alternatives. You will also be exposed to caching, code organization, build and deployment best practices that produce the best user experiences. Finally, you will see how to use the navigation timing and performance timing APIs to fine tune your applications to produce a fast, lean application your customers will love.
Ajax Performance Tuning and Best Practices
Ajax Performance Tuning and Best Practices
Perhaps the most primary motivation to develop Ajax application is to have better user experience hence how to achieve the optimized response time becomes an important aspect in Ajax performance optimization. In this session, we will focus on discussing the improvement of the network transfer time and the JavaScript processing time as the server response is already generally well understood. We will use an Ajax framework case study to show how an Ajax optimization process can be used to optimize the performance. During the optimization process, we will demonstrate how to measure the performance, how to determine the bottlenecks and how to resolve the problems by applying various best practice. Various tools like NetBeans, Firebug, and YSlow will be illustrated to show when to use what and how to use them. The list of Ajax Performance tuning tips on combining CSS and JavaScript resources, setting the correct headers, using minifed JavaScript, GZip contents, and Strategically placing of CSS links and JavaScript tags will be discussed in the session.
Intermediate level Ajax and Enterprise developers can really benefit from this session.
After the session, the audience will be able to:
-apply Ajax Performance Optimization process
-choose the right tool and use them
-lleverage various best practice and performance tuning tips
-improve their Ajax application response time ultimately
Perhaps the most primary motivation to develop Ajax application is to have better user experience hence how to achieve the optimized response time becomes an important aspect in Ajax performance optimization. In this session, we will focus on discussing the improvement of the network transfer time and the JavaScript processing time as the server response is already generally well understood. We will use an Ajax framework case study to show how an Ajax optimization process can be used to optimize the performance. During the optimization process, we will demonstrate how to measure the performance, how to determine the bottlenecks and how to resolve the problems by applying various best practice. Various tools like NetBeans, Firebug, and YSlow will be illustrated to show when to use what and how to use them. The list of Ajax Performance tuning tips on combining CSS and JavaScript resources, setting the correct headers, using minifed JavaScript, GZip contents, and Strategically placing of CSS links and JavaScript tags will be discussed in the session.
Intermediate level Ajax and Enterprise developers can really benefit from this session.
After the session, the audience will be able to:
-apply Ajax Performance Optimization process
-choose the right tool and use them
-lleverage various best practice and performance tuning tips
-improve their Ajax application response time ultimately
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CAKE: Sharing Slices of Confidential Data on Blockchain
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Overview
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Diese Themen werden behandelt
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- Verstehen des DLAU-Tools und wie man es am besten nutzt
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Introduction to Meteor at ChaDev Lunch
- 1. Introduction to MeteorJS by Andrew McPherson
- 2. a bit about me. Andrew McPherson I like videogames. 1. Aspiring developer and entrepreneur. 2. Born and raised here in Chattanooga. 3. Student of computer science at UTC. github.com/arcym twitter.com/andrewmcp333 I once had a beard.
- 3. My current project is “the online video editor” ● Originally it was built through a lot of NodeJS with MongoDB and SocketIO. ● But I had a lot of issues in maintaining consistency of data between clients. ● Then I stumbled upon MeteorJS! a bit about my projects.
- 4. a bit about meteor. Meteor is a javascript framework that offers... ● client data synchronization. ● reactive updating templates. ● external module interoperability. ● just really simple syntax. It doesn’t want to replace existing frameworks, but integrate upon them.
- 5. Want to see a bit of syntax?
- 6. Starting the project To initialize... meteor create NoogaDocs > NoogaDocs created! cd NoogaDocs ls > .meteor > NoogaDocs.css > NoogaDocs.html > NoogaDocs.js To execute... meteor > Started proxy. > Started database. > Started application. > App at 127.0.0.1:3000
- 7. In the .html <head> <title>NoogDocs</title> </head> <body> <div id=“greeting”> Hello, {{name}}! </div> </body> In the .js if(Meteor.isClient) { Template.name = “World”; } In the .css #greeting { font-weight: bold; } Trying it out
- 8. In the .js if(Meteor.isClient) { var who = “World” Template.greet.name = who } In the .html <template name=“greet”> <div id=“greeting”> Hello, {{name}}! </div> </template> <body> {{> greet}} </body> Defining a template
- 9. In the .js if(Meteor.isClient) { Template.greet.name = function() { var who = “World”; return who; } //this is just another way of doing it. } Using more functions
- 10. In the .js if(Meteor.isClient) { Template.greet.name = function() { var who = this || “World”; return who; } } In the .html {{> greet “Andrew”}} {{> greet “Anthny”}} {{> greet “Adam”}} Accessing the data
- 11. In the .js Template.list.persons = [ {name: “Andrew”}, {name: “Anthony”}, {name: “Adam”} ]; In the .html <template name=“list”> <ul> {{#each persons}} <li>{{name}}</li> {{/each}} </ul> </template> <body> {{> list}} </body> Iterating via helpers
- 12. In the .js var Persons = new Meteor.Collection(“persons”); if(Meteor.isClient) { Template.list.persons = Persons.find({}); } if(Meteor.isServer) { Persons.insert({name: “Andrew”}); Persons.insert({name: “Anthony”}); Persons.insert({name: “Adam”}); } Including a database
- 13. Binding to events In the .js var Persons = new Meteor.Collection(“persons”); if(Meteor.isClient) { Template.list.persons = Persons.find({}); Template.list.events = { “click li”: function() { Persons.remove(this._id); } } }
- 14. So let’s try a live demo! Hopefully I won’t mess this up! (May the programming gods have mercy on my soul)
- 15. some issues with meteor ● potential networking latency ● best for single page apps ● still in development : ● ● ● ● not much else than that.
- 16. some resources for meteor Meteor Documentation: docs.meteor.com Meteor Examples: meteor.com/learn-meteor NoogaDocs Github: github.com/arcym/noogadocs “Useful Meteor Resources” discovermeteor.com/blog/useful-meteor-resources “How to learn Javascript properly” javascriptissexy.com/how-to-learn-javascript-properly
- 17. Thank you so much!