Install rexml

If the constructor takes a String argument, the string will be expected to contain an XML document. An example:. At the irb prompt, we load the file bibliography. After that, we can execute commands to access the elements and attributes of the document, in an interactive way.

Now you can explore the document very easily. Let's look at a typical irb session with our XML file:. First we use the name root to access the document root. The document root is here the bibliography element.

Each Element object has an Attributes object named attributes which acts as a hash map with the names of the attributes as keys and the attribute values as values.

So with root. In the same manner, each Element object has an Elements object named elements , with each and [] methods to get access to the subelements. The [] method takes an index or XPath expression as its argument and returns the child elements which match the expression. The XPath expression acts like a filter, deciding which elements will be returned.

Note that root. Actually, root. The method each of the class Elements iterates through all the child elements, optionally filtering them by a given XPath expression. The code block will be executed then for each iteration. In addition, the method Element. Now we will create a small bibliography document, consisting of one biblioentry , from scratch.

Here's how it goes:. As you see, we create an empty new document and we add one element to it. This element becomes the root. Ruby 3 no longer includes the rexml gem by default. The CocoaPods component Xcodeproj uses rexml , but does not declare it as a dependency. Based on that commit, I have added this line to my Gemfile - similar to the above suggestion, but with a matching version specifier:. I just added gem 'rexml' to Gemfile Then run bundle install. Thanks DanSam5K Worked for me.

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It keeps track of small to medium amounts of data without any SQL based technique in backend. It contains less than lines of code, hence, lighter in weight.