class Dentaku::AST::StringFunctions::Left
Public Class Methods
max_param_count()
click to toggle source
# File lib/dentaku/ast/functions/string_functions.rb, line 24 def self.max_param_count 2 end
min_param_count()
click to toggle source
# File lib/dentaku/ast/functions/string_functions.rb, line 20 def self.min_param_count 2 end
new(*args)
click to toggle source
Calls superclass method
Dentaku::AST::Function::new
# File lib/dentaku/ast/functions/string_functions.rb, line 28 def initialize(*args) super @string, @length = *@args end
Public Instance Methods
value(context = {})
click to toggle source
# File lib/dentaku/ast/functions/string_functions.rb, line 33 def value(context = {}) string = @string.value(context).to_s length = Dentaku::AST::Function.numeric(@length.value(context)).to_i negative_argument_failure('LEFT') if length < 0 string[0, length] end