class CacheCrispies::Memoizer
Simple class to handle memoizing values by a key. This really just provides a bit of wrapper around doing this yourself with a hash.
Attributes
cache[R]
Public Class Methods
new()
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# File lib/cache_crispies/memoizer.rb, line 7 def initialize @cache = {} end
Public Instance Methods
fetch(key) { || ... }
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Fetches a cached value for the given key, if it exists. Otherwise it calls the block and caches that value
@param key [Object] the value to use as a cache key @yield the value to cache and return if there is a cache miss @return [Object] either the cached value or the block's value
# File lib/cache_crispies/memoizer.rb, line 17 def fetch(key, &_block) # Avoid ||= because we need to memoize falsey values. return cache[key] if cache.key?(key) cache[key] = yield end