class RuboCop::Cop::Style::StringChars

Checks for uses of `String#split` with empty string or regexp literal argument.

@safety

This cop is unsafe because it cannot be guaranteed that the receiver
is actually a string. If another class has a `split` method with
different behavior, it would be registered as a false positive.

@example

# bad
string.split(//)
string.split('')

# good
string.chars

Constants

BAD_ARGUMENTS
MSG
RESTRICT_ON_SEND

Public Instance Methods

on_send(node) click to toggle source
# File lib/rubocop/cop/style/string_chars.rb, line 29
def on_send(node)
  return unless node.arguments.one? && BAD_ARGUMENTS.include?(node.first_argument.source)

  range = range_between(node.loc.selector.begin_pos, node.source_range.end_pos)

  add_offense(range, message: format(MSG, current: range.source)) do |corrector|
    corrector.replace(range, 'chars')
  end
end