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What are the most useful gems to use in Rails?
RubyGems were developed to simplify and accelerate the stages of the application creation deployment and library connection. Utilizing this package manager for Ruby saves you time as you get ready-made solutions to almost any task instead of writing the functions from scratch. Each gem contains a particular element of functionality including all related files. Unfortunately they aren structured in any way so in order to find ruby gems it better to use a regular search engine and the required key words (check GitHub s ). Our dedicated development team also actively employs Ruby Gems in the process of software development. Here is the top of the most popular and useful ruby gems according to our experience GeoCoder s . Being able to connect through itself over 4 APIs this Ruby gem implements both the direct and reverse geocoding by IP address geographical coordinates and even real physical addresses (e.g. the address of the street). Bullet s . The most downloaded Ruby gems out there. It was initially created with an intention to boost software performance. It does so by decreasing the total amount of client-server requests. Basically Bullet tracks the N+1 cases of requests and notifies the developer when other tools can be used instead (e.g. cache counter). Pry s . We rmend to simplify the bug fixing procedures for your RoR-based application with the Pry gem which is a more advanced alternative to the standard IRB wrapper. ActiveModelSerializers s (which starts lagging while processingpound documents) and uses caching. Fast JSON API s . Fast JSON API wille in handy when you need fast serialization of software code. It works much faster than Wicked PDF s . This gem is working alongside with wkhtmltopdf s and helps realizing an interaction with the DSL generator. Devise Masquerade s . This Ruby gem helps developing multi user apps. In particular youll be able to test your app from the perspective of users with different levels of access. Devise s . Based on the MVC model the Devise gem can provide secure user authentication and session management. Letter opener s . If you need to create a newsletter mechanism to send notifications to all users that launched your app this gem will help you do that much easier you won need to integrate and configure your own SMTP server. Money Rails s . If you are planning to integrate your app with Ruby Money this gem wille in quite handy. Pundit s . A tool that allows defining different levels of access to the app functionality according to the rights of an authorized user.
How do I use Automator to batch convert multiple Apple pages to PDF documents?
You don't specify the version of Pages or OS X so I will presume that in both cases you're using the most recent (or at least close). There are various options for creating workflows a workflow an app a service a folder action a dictationmand etc. If you aren't sure how any of these work then Workflow is probably the best choice. Create a new workflow. In the Library panel select Files & Folders and drag Ask for Finder Items into the workflow panel. Next click on the Utilities item in the Library and drag Run JavaScript into the workflow under the Ask for Finder Items. The Run JavaScript item will have a template for a JavaScript function in it. Replace that with function run(input parameters) code inFile = Path( input ); code outFile = Path( ().replace(^.+$ '.pdf') ); code code code pages = Application('Pages'); code document = ( inFile ); code code (document to outFile as 'PDF'); code (document saving 'no'); code code return outFile; code code When you run the workflow you'll be asked to select 1 or more files (select only Pages ones since my example isn't going to check if they are Pages documents) and the workflow will open each in pages save it as a PDF in the same folder and close the document. I think Yosemite's support for JavaScript for Automation makes it a little easier to understand.
What makes one web browser faster than another?
I will try exing this in a way both tech technically inclined people can understand. I am also using the current Quora page as an example. Assuming all other factors (platform band processing power disk speeds memory and the page being viewed) to be equal(they should be for fairparison) the factors that determine the browsers speed in terms of what is perceived by the user are 1. The Layout engine engine nEach browser has a layout engine under the hood. For example the different browser engines used in browsers aren WebKit Chrome and Safari Gecko Firefox Trident IE Presto Operan The layout engine is what decides when what part and how HTML tags s 436 1152 master_ s zoomable s SVG files and visual elements are handled. For example IE has limited SVG support while Opera has the best support for interactive SVGs. The apparent differences in HTML5 support are also handled by this part of the browser. That is the reason this same HTML above shows up differently in older browsers like IE8. All the engines listed above are written in C++.n n 2. The JavaScript engine nEvery browser has a JavaScript engine which handles how the user interacts with the visual elements. For example the different JavaScript engines used by browsers are n V8 Chrome SpiderMonkey Firefox NitroSafari Carakan Opera Chakra IE9n The Java script engine processes how a user interacts with the page (everything happening in the background process). It executes all the JavaScript that tags along in the page.n A JavaScript engine affects speeds because n When the user interacts with the page (e.g. presses a button s some in the search bar etc.) the JavaScript engine processes the request and fills the search information back into the box. All AJAX calls jQuery DOM manipulation etc done in programs are also handled by this part of the browser.n The way the JavaScript is handled by each of these engines is different. Due to the javascriptpiler and handling of JSON data. Hence the difference in speed. For example Apple reserves the Nitro javascript engine for Safari alone and other developers are forced to use a different slower engine. This is the reason why Safari will always be the fastest browser in iOS. Some engines like V8 have some critical parts written in assembly and non critical parts in C++. All the other engines are written in C++n n 3. Cachingpression in the cloud nIn scenarios where band is limited the two factors listed above be less important. This is a game changer that makes the other two factors listed above kind of irrelevant (the code to be fetched is slower so they are in wait for the processing to start) up to a certain level. This technology was introduced by Opera - Opera Turbo.n Caching affects speeds because n The page is fetched by a serverpressed in terms of quality and so on to save data transfer. n 4. Local Caching nBrowsers also cache some of the content like scripts frequently accessed pages etc for later use. This leads to faster load times as the content is fetched from the disk instead of over an internet medium. This is the reason go is faster than reload by Kevin Ernest Long user 1427783 5. Plugin management nA typical user opens pages containing RIA (rich internet applications such as Flash Silverlight Java FX Quicktime etc) which handle video audio games etc in the browser. The way that these plugins are handled by the browser window and how it interacts with it are different. Chrome has built in Flash PDF support. The other browsers handle this differently. For example I am currently using Firefox. The process associated with firefox are Plugin management affects speeds because n Not to a large extent but the sluggishness that results when too many of these applications are opened is because of poor plugin management.n n 6. Memory management nEach tab is also to be given equal priority script execution and everything else mentioned above. The memory address of these has to be kept separate so that security breaches do not occur and one tab crashing does not case the browser to crash.n Firefox has 4+ tabs yet runs as a single process with as many threads. IE and Chrome open a separate process for each new tab. This affects the speed of tabs stability and the overall experience for the user.