I would like to write a Ruby program which can parse three separate text files, each containing different delimiters, then sort them according to certain criteria.
Can someone please point me in the right direction?
It is not clear what is the data format in your files, and what criteria you used to sort, so I am not able to provide you a accurate answer.
However, basically, you might need something like this:
File.open("file_name","r").read.split(",").sort_by {|x| x.length}
You:
Opened a file using File.open.
Read the whole file and got a string. You can also read the file line-by-line using the each method.
Split the string use split. The delimiter used is ,.
Use sort_by to sort them according to the criteria specified in the block.
Enumerable#sort_by will allow you to sort an array (or other enumerable object) with a specific comparison function.
If by "text files with delimiters" you mean CSV files (character seperated values), then you can use the csv library, which is part of the standard library, to parse them. CSV gives you objects that look and feel like Ruby Hashes and Arrays, so you can use all the standard Ruby methods for sorting, filtering and iterating, including the aforementioned Enumerable#sort_by.
Related
I have a very long script that contains a huge list of brand names that is not in alphabetical order. The result of many different people working on it over a few years :) Question - is there a way to re-order lines of code alphabetically in Visual Studio Code (VSCode)? I know this is possible for single lines of code, but is it possible for multi-line blocks of code that have been indented? See attached example - so in this case I would be looking to select all these lines of code and sort by the brand name (acer, acqua, aeg, amazon etc) and retain the nested parts of the code for each. Many thanks in advance if anyone has any ideas or suggestions
Screenshot of code to be sorted
I tried sorting in VSCode, but it only sorts individual lines of code and mixes them together. It does not recognize multiline, nested blocks of code as being one group of code that can be sorted individually
[Assuming you have a json object or could your text into one. Looks very close already - if it isn't json you might consider making a separate file and make it json, so you can use a sorter.]
I see a number of json sorters in the Marketplace: just search for json sort.
This one has 280K+ downloads: Sort JSON Objects
And I see a couple more. There is no built-in way to do what you want, you will need an extension.
I would:
Replace new line + 3x - \n\t\t\t - with an empty string
Sort
Format document (you may need to Change Language Mode first)
I need to pair two text files, One file contains User:Hash and the other file contains Hash:Pass I want a 3rd text file created containing User:Pass based on matching Pairs.
Hash-Killer has some awesome tools meant to split hashes and passwords.
https://hashkiller.co.uk/list-tool.aspx
or
alternatively you could use REGEX that is the method that they use to provide the "text tool"
PS: I know this from personally cracking hashes, and it can be a pain to sort out. regex would be a good option.
This is the general goal I am trying to achieve:
My VB.NET program will generate some Lists that may contain booleans, integers, strings, or more lists. I want the program to output a "file" which basically contains such data. It is important that the file cannot be read by humans Okay actually, fine, human-readable data wouldn't be bad.
Afterward, I want my Ruby program to take such file and read the contents. The Lists become arrays, and integers, booleans and strings are read alright with Ruby. I just want to be able to read the file, I might not need to write it using Ruby.
In .Net you'd use a BinaryWriter, if you're using IronRuby you'd then use a BinaryReader. If you're not using IronRuby, then perhaps...
contents = open(path_to_binary_file, "rb") {|io| io.read }
Why do you not want it to be human readable? I hope it's not for security reasons...
use JSON you can use the json.net nuget package.
How would I create a list of elements in VB.NET, save it to a .dat file, and make Ruby re-create such list (as an array) with such elements (they will be strings, booleans and integers)?
You can do it, but you'd need to find some representation for it. The easiest is probably JSON, so you would
make the data structure in VB
write it to JSON as a file
read the JSON file using Ruby.
Here's a JSON serializer for .Net:
A .dat file is just a binary blob, 'tis it not? If there's any particular format you use you could easily translate that to equivalent Ruby code. Just as long as the knowledge is duplicated on both ends, though that leads to a violation of the DRY principle. JSON might be a good intermediate representation (as noted by #Charlie Martin) because it's a plain text format and you can always add compression.
I am generating some XML using a builder, and would like to compare the results to some file contents. However, since the strings are so long, the output is hard to read when the strings differ.
I know there are a number of libraries for diffing strings in ruby, but is there a built in facility in rspec for generating multiline string comparison failures that are easier to read?
Okay, got it. You need to use the --diff option with the following:
actual_multiline_string.should == expected_multiline_string
NOT
actual_multiline_string.should eql(expected_multiline_string)