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Contents
module SPCore
# Provides methods to make limiting Proc objects, bound to
# the given limits.
class Limiters
# make a limiter that actually doesn't limit at all.
def self.make_no_limiter
return lambda do |input|
return input
end
end
# make a limiter that keeps values within the given range.
def self.make_range_limiter range
return lambda do |input|
if input < range.first
return range.first
elsif input > range.last
return range.last
else
return input
end
end
end
# make a limiter that keeps values at or below the given upper limit.
def self.make_upper_limiter limit
return lambda do |input|
if input > limit
return limit
else
return input
end
end
end
# make a limiter that keeps values at or above the given lower limit.
def self.make_lower_limiter limit
return lambda do |input|
if input < limit
return limit
else
return input
end
end
end
# make a limiter that limits values to a set of good values. Given also the
# current value, it either returns the input value if it's included in
# the set of good values, or it returns the current value.
def self.make_enum_limiter good_values
return lambda do |input, current|
if good_values.include?(input)
return input
else
return current
end
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems