Ruby compare text files

For this, we are going to use text gem. Now your rails app is ready. Open Gemfile and write following line to add gem. Idea below sample code run on irb console. This is exactly what we want. Now as we have written remote: true in the form it would send an AJAX request. Really the best way would be to first loop through, recursively, and associate each token with a position in the text and use that to do the analysis, but this method below is fast and easy. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Compare two text files in ruby Ask Question. Asked 4 years, 8 months ago. Active 2 years, 3 months ago. Viewed 1k times. However, I need the output in similar to below format. Improve this question. Improve this question. Arturo Herrero 12k 9 9 gold badges 40 40 silver badges 71 71 bronze badges.

What does your current method look like? You say you have a method that does 'x' so please do show your code. See sscce. You need to show code, sample data and any errors.

Add a comment. Active Oldest Votes. On a trivial level: IO. Improve this answer. The following code displays the use of the method IO. In this code, the variable arr is an array. Each line of the file input. Therefore, arr[0] will contain the first line, whereas arr[1] will contain the second line of the file. This method also returns output line by line. The difference between the method foreach and the method readlines is that the method foreach is associated with a block.

However, unlike the method readlines , the method foreach does not return an array. This code will pass the contents of the file test line by line to the variable block, and then the output will be displayed on the screen. You can rename and delete files programmatically with Ruby with the rename and delete methods.

Following is the example to change mode of an existing file test. All files are contained within various directories, and Ruby has no problem handling these too. Whereas the File class handles files, directories are handled with the Dir class. To change directory within a Ruby program, use Dir. You can get a list of the files and directories within a specific directory using Dir.

The Dir. Temporary files are those that might be created briefly during a program's execution but aren't a permanent store of information. To make Dir. You can use Dir. This code creates a temporary file, writes data to it, and deletes it.