struct YAML::Any

Overview

YAML::Any is a convenient wrapper around all possible YAML core types (YAML::Any::Type) and can be used for traversing dynamic or unknown YAML structures.

require "yaml"

data = YAML.parse <<-END
         ---
         foo:
           bar:
             baz:
               - qux
               - fox
         END
data["foo"]["bar"]["baz"][0].as_s # => "qux"
data["foo"]["bar"]["baz"].as_a    # => ["qux", "fox"]

Note that methods used to traverse a YAML structure, #[], #[]? and #each, always return a YAML::Any to allow further traversal. To convert them to String, Array, etc., use the as_ methods, such as #as_s, #as_a, which perform a type check against the raw underlying value. This means that invoking #as_s when the underlying value is not a String will raise: the value won't automatically be converted (parsed) to a String. There are also nil-able variants (#as_i?, #as_s?, ...), which return nil when the underlying value type won't match.

Defined in:

helpers/overloads.cr

Instance Method Summary

Instance Method Detail

def dig(index_or_key, subkeys : Array) #

dig method overload to support using arrays for subkeys


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