hash_cache
- 1.0.0
- 1.1.6 (0)
- 1.2.6 (0)
- 2.0.3
- 2.1.0
- 2.2.1
- 2.3.8
- 3.0.0
- 3.0.9
- 3.1.0
- 3.2.1
- 3.2.8
- 3.2.13
- 4.0.2
- 4.1.8
- 4.2.1
- 4.2.7
- 4.2.9
- 5.0.0.1
- 5.1.7
- 5.2.3
- 6.0.0
- 6.1.3.1
- 6.1.7.7
- 7.0.0
- 7.1.3.2
- What's this?
hash_cache(method_name, options = {})
public
Dynamically create a nested hash structure used to cache calls to method_name The cache method is named +#{method_name}_cache+ unless :as => :alternate_name is given.
The hash structure is created using nested Hash.new. For example:
def slow_method(a, b) a ** b end
can be cached using hash_cache :slow_method, which will define the method slow_method_cache. We can then find the result of a ** b using:
slow_method_cache[a][b]
The hash structure returned by slow_method_cache would look like this:
Hash.new do |as, a| as[a] = Hash.new do |bs, b| bs[b] = slow_method(a, b) end end
The generated code is actually compressed onto a single line to maintain sensible backtrace signatures.