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ellcs/json_crystal_union_types.cr

Last active June 11, 2020 20:56
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json_crystal_union_types.cr
# https://crystal-lang.org/api/0.22.0/JSON.html
# online repl: https://play.crystal-lang.org/#/r/995s
require "json"
value = JSON.parse("[1, 2, 3]").raw # : JSON::Any
# (Array(JSON::Any) | Bool | Float64 | Hash(String, JSON::Any) | Int64 | String | Nil)
typeof(value)
if value.is_a?(Array)
puts typeof(value) # Array(JSON::Any)
elsif value.is_a?(Hash)
puts typeof(value) # Hash(JSON::Any)
elsif value.is_a?(Int64)
puts "int"
end
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