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Contents
# frozen_string_literal: true
##
# The {Ryo::Keywords Ryo::Keywords} module implements Ryo equivalents
# for some of JavaScript's keywords (eg: the **in** and **delete** operators).
# The instance methods of this module are available as singleton
# methods on the {Ryo} module.
module Ryo::Keywords
##
# @example
# point = Ryo(x: 0, y: 0, print: Ryo.fn { print x, y, "\n" })
# point.print.()
#
# @param [Proc] b
# The function's body.
#
# @return [Ryo::Function]
# Returns a Ryo function.
#
# @see Ryo::Function Ryo::Function
def fn(&b)
Ryo::Function.new(&b)
end
alias_method :function, :fn
##
# Equivalent to JavaScript's **in** operator
# @param [<Ryo::Object, Ryo::BasicObject>] ryo
# A Ryo object
# @param [<String, #to_s>] property
# A property name
# @return [Boolean]
# Returns true when **property** is a member of **ryo**, or its prototype chain
def in?(ryo, property)
return false unless ryo
property?(ryo, property) || in?(prototype_of(ryo), property)
end
##
# The {#delete} method deletes a property from a Ryo object
# @see Ryo::Reflect#delete!
# @param [<Ryo::Object, Ryo::BasicObject>] ryo
# A Ryo object
# @param [<String, #to_s>] property
# A property name
# @param [Integer] ancestors
# The number of prototypes to traverse.
# Defaults to the entire prototype chain.
# @return [void]
def delete(ryo, property, ancestors: nil)
each_ryo(ryo, ancestors:) do
Ryo.property?(_1, property) ? table_of(_1).delete(property) : nil
end
end
end
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4 entries across 4 versions & 2 rubygems