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Contents
# Validator module is used to validate if the user input is correct
module Validator
def balanced_brackets?(token)
strim = token.gsub(/[^\[\]\(\)\{\}]/, '')
return true if strim.empty?
return false if strim.size.odd?
loop do
s = strim.gsub('()', '').gsub('[]', '').gsub('{}', '')
return true if s.empty?
return false if s == strim
strim = s
end
end
def balanced_quotes?(token)
token.count('"').even?
end
def valid_var_name(var)
!var.match(/^[[:alpha:]]+$/).nil?
end
def valid_var(var)
(valid_literals var) || (valid_objects var)
end
def valid_function(fn)
idx = fn[0] == '(' ? (find_bracket_idx fn, 0) : 0
func =
if idx.zero?
predefined_method_caller [fn[idx]]
else
calc_input_val fn[0..idx]
end
raise 'No such procedure' if func.nil? && (!func.is_a? Proc)
[func, fn[idx + 1..-1]]
end
private
def valid_literals(var)
number = check_for_number var
string = check_for_string var
boolean = check_for_bool var
symbol = check_for_symbol var
quote = check_for_quote var
number || string || boolean || symbol || quote
end
def valid_objects(var)
var.list? || var.pair?
end
end
Version data entries
6 entries across 6 versions & 1 rubygems