Ruby read write a file

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But if you want to work with binary data, there is some extra work to do. The H used with the pack method gives you a hex number to string conversion. Then there is the string itself. There is also the bindata gem , which is built specifically to help you parse binary structures.
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IO in Ruby

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How to Read & Parse CSV Files With Ruby - RubyGuides

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A Guide to the Ruby CSV Library, Part I

If you don't have already installed JSON gem on your computer you can install it running the following command. You can check if everything is installed correctly if it is, you are going to have something like this:. In order to read the file, we have to execute the following command, giving the file that we would like to read. In this case we are going to use the following JSON file to get the data, save into a hash, make modifications and save the changes into the same JSON file. In order to get the file into a proper hash to start working in it, we have to read the file and save into a variable, then we have to parse that variable.
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In this post, I will review options for parsing Excel files using Ruby. It is important to identify the type of Excel files that you are going to be using. There is a nice description of the differences on Wikipedia. The tldr; version is that the legacy file format includes files with the following extensions:.
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