By Marshall C. Yovits
Read Online or Download Advances in Computers. Vol. 28 PDF
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Scripted GUI checking out with Ruby is a pragmatic, quick-moving educational in keeping with actual existence, and real-world GUI applications.
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The ebook makes use of examples from home windows, OS X, and cross-platform Java laptop courses in addition to net purposes. You'll increase try out scripts in Ruby; you don't have to be a Ruby professional, yet easy convenience with the language could be helpful.
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All too usually, software program improvement is deemed unmanageable. the inside track is full of tales of initiatives that experience run catastrophically over time table and finances. even supposing including a few formal self-discipline to the improvement procedure has more advantageous the placement, it has on no account solved the matter. How can it's, with rather a lot money and time spent to get software program improvement below keep watch over, that it continues to be so unmanageable?
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Additional info for Advances in Computers. Vol. 28
Definitions provide a way to programmatically describe what these components look like, and implement any logic that they might need. °° Ruby libraries: This includes any re-usable code that your recipes need and can be included in the cookbook. Things that go in here are accessible by your recipes and automatically loaded for you. °° Support Files: These are arbitrary data files that don't fall into any of the other categories. °° Tests: Recipes, being composed of Ruby code, can include unit tests or cucumber tests to verify that the logic works.
Executing Ruby: To execute some arbitrary Ruby code, you use the <% %> container. The <% tag indicates the beginning of the Ruby code, and %> tag indicates the end of the block. The block can span multiple lines or just one single line. each do |value| %> Non-ruby text... <% end %> The preceding code would yield the following output: Non-ruby text... Non-ruby text... Non-ruby text... ÊÊ Variable replacement: ERB has syntax for replacing the block with the results of the block, and that container is similar to the last one, with the addition of the equal sign inside the opening tag.
Additionally, you may pass variables into the template resource using the variables attribute inside the resource block. com DocumentRoot <%= @params[:document_root] %> Where to store templates The templates directory has its own directory hierarchy inside of it, a mandatory one named default and then any platform-specific or host-specific directories alongside it. Chef has a specific order in which it will search the directories for a template: 1. Hostname 2. Distribution-version 3.