Class: JsonlReaderWriter::Reader

Inherits:
Object
  • Object
show all
Defined in:
lib/jsonl_reader_writer/reader.rb

Overview

Reader class: Provides methods to read and process .jsonl files

Instance Method Summary collapse

Constructor Details

#initialize(file_path) ⇒ Reader

initialize method: Takes a file path as an argument, and validates that the file is a .jsonl file



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# File 'lib/jsonl_reader_writer/reader.rb', line 7

def initialize(file_path)
  @file_path = file_path
  validate_file_extension
end

Instance Method Details

#each ⇒ Object

each method: Opens the file, reads each line, parses it as JSON, and yields it along with its index If there’s an error parsing a line, it rescues the exception and prints an error message



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# File 'lib/jsonl_reader_writer/reader.rb', line 14

def each
  File.open(@file_path, 'r') do |f|
    f.each_line.with_index do |line, index|
      begin
        yield JSON.parse(line.chomp), index
      rescue => e
        puts "Error parsing line #{index + 1}: #{e.message}"
      end
    end
  end
end

#filter(&block) ⇒ Object

filter method: Iterates over each line in the file and adds it to an array if it meets the condition specified in the block



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# File 'lib/jsonl_reader_writer/reader.rb', line 27

def filter(&block)
  filtered_data = []

  each do |data, line_number|
    filtered_data << data if block.call(data)
  end

  filtered_data
end

#map(&block) ⇒ Object

map method: Iterates over each line in the file and adds the result of the block operation to an array



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# File 'lib/jsonl_reader_writer/reader.rb', line 38

def map(&block)
  mapped_data = []

  each do |data, line_number|
    mapped_data << block.call(data)
  end

  mapped_data
end