JSON::Any
struct JSON::Any
Overview
JSON::Any
is a convenient wrapper around all possible JSON types (JSON::Type
) and can be used for traversing dynamic or unknown JSON structures.
obj = JSON.parse(%({"access": [{"name": "mapping", "speed": "fast"}, {"name": "any", "speed": "slow"}]})) obj["access"][1]["name"].as_s # => "any" obj["access"][1]["speed"].as_s # => "slow"
Note that methods used to traverse a JSON structure, #[]
, #[]?
and #each
, always return a JSON::Any
to allow further traversal- To convert them to String
, Int32
, etc., use the as_
methods, such as #as_s
, #as_i
, 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
.
Included Modules
Defined in:
json/any.crClass Method Summary
- .new(raw : JSON::Type)
Creates a
JSON::Any
that wraps the givenJSON::Type
. - .new(pull : JSON::PullParser)
Reads a
JSON::Any
value from the given pull parser-
Instance Method Summary
- #==(other)
Returns
true
if the raw object is equal to other. - #==(other : JSON::Any)
Returns
true
if bothself
and other's raw object are equal. - #[](index : Int) : JSON::Any
Assumes the underlying value is an
Array
and returns the element at the given index. - #[](key : String) : JSON::Any
Assumes the underlying value is a
Hash
and returns the element with the given key. - #[]?(index : Int) : JSON::Any?
Assumes the underlying value is an
Array
and returns the element at the given index, ornil
if out of bounds. - #[]?(key : String) : JSON::Any?
Assumes the underlying value is a
Hash
and returns the element with the given key, ornil
if the key is not present. - #as_a : Array(Type)
Checks that the underlying value is
Array
, and returns its value. - #as_a? : Array(Type)?
Checks that the underlying value is
Array
, and returns its value. - #as_bool : Bool
Checks that the underlying value is
Bool
, and returns its value. - #as_bool? : Bool?
Checks that the underlying value is
Bool
, and returns its value. - #as_f : Float64
- #as_f32 : Float32
- #as_f32? : Float32?
- #as_f? : Float64?
- #as_h : Hash(String, Type)
Checks that the underlying value is
Hash
, and returns its value. - #as_h? : Hash(String, Type)?
Checks that the underlying value is
Hash
, and returns its value. - #as_i : Int32
- #as_i64 : Int64
- #as_i64? : Int64?
- #as_i? : Int32?
- #as_nil : Nil
Checks that the underlying value is
Nil
, and returnsnil
. - #as_s : String
Checks that the underlying value is
String
, and returns its value. - #as_s? : String?
Checks that the underlying value is
String
, and returns its value. - #each(&block)
- #raw : JSON::Type
Returns the raw underlying value, a
JSON::Type
. - #size : Int
Instance methods inherited from module Enumerable(self)
all?(&block)all? all?, any?(&block)
any? any?, chunks(&block : T -> U) forall U chunks, compact_map(&block) compact_map, count(&block)
count(item) count, cycle(n, &block)
cycle(&block) cycle, each(&block : T -> _) each, each_cons(count : Int, reuse = false, &block) each_cons, each_slice(count : Int, reuse = false, &block) each_slice, each_with_index(offset = 0, &block) each_with_index, each_with_object(obj, &block) each_with_object, find(if_none = nil, &block) find, first(count : Int)
first first, first? first?, flat_map(&block : T -> Array(U) | Iterator(U) | U) forall U flat_map, grep(pattern) grep, group_by(&block : T -> U) forall U group_by, in_groups_of(size : Int, filled_up_with : U = nil) forall U
in_groups_of(size : Int, filled_up_with : U = nil, reuse = false, &block) forall U in_groups_of, includes?(obj) includes?, index(&block)
index(obj) index, index_by(&block : T -> U) forall U index_by, join(separator, io)
join(separator = "")
join(separator, io, &block)
join(separator = "", &block) join, map(&block : T -> U) forall U map, map_with_index(&block : T, Int32 -> U) forall U map_with_index, max max, max? max?, max_by(&block : T -> U) forall U max_by, max_by?(&block : T -> U) forall U max_by?, max_of(&block : T -> U) forall U max_of, max_of?(&block : T -> U) forall U max_of?, min min, min? min?, min_by(&block : T -> U) forall U min_by, min_by?(&block : T -> U) forall U min_by?, min_of(&block : T -> U) forall U min_of, min_of?(&block : T -> U) forall U min_of?, minmax minmax, minmax? minmax?, minmax_by(&block : T -> U) forall U minmax_by, minmax_by?(&block : T -> U) forall U minmax_by?, minmax_of(&block : T -> U) forall U minmax_of, minmax_of?(&block : T -> U) forall U minmax_of?, none?(&block)
none? none?, one?(&block) one?, partition(&block) partition, product(&block)
product(initial : Number, &block)
product
product(initial : Number) product, reduce(&block)
reduce(memo, &block) reduce, reject(&block : T -> ) reject, select(&block : T -> ) select, size size, skip(count : Int) skip, skip_while(&block) skip_while, sum(initial)
sum
sum(initial, &block)
sum(&block) sum, take_while(&block) take_while, to_a to_a, to_h to_h, to_set to_set
Instance methods inherited from struct Struct
==(other : self) : Bool ==, hash : Int32 hash, inspect(io : IO) : Nil inspect, pretty_print(pp) : Nil pretty_print, to_s(io) to_s Instance methods inherited from struct Value
==(other) ==, dup dup Instance methods inherited from class Object
!=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml(io : IO)
to_yaml to_yaml, try(&block) try
Class methods inherited from class Object
from_json(string_or_io, root : String) : selffrom_json(string_or_io) : self from_json, from_yaml(string_or_io) : self from_yaml
Class Method Detail
def self.new(raw : JSON::Type)Source
Creates a JSON::Any
that wraps the given JSON::Type
.
def self.new(pull : JSON::PullParser)Source
Reads a JSON::Any
value from the given pull parser-
Instance Method Detail
def ==(other)Source
Returns true
if the raw object is equal to other.
def as_a : Array(Type)Source
Checks that the underlying value is Array
, and returns its value. Raises otherwise.
def as_a? : Array(Type)?Source
Checks that the underlying value is Array
, and returns its value. Returns nil
otherwise.
def as_bool : BoolSource
Checks that the underlying value is Bool
, and returns its value. Raises otherwise.
def as_bool? : Bool?Source
Checks that the underlying value is Bool
, and returns its value. Returns nil
otherwise.
def as_h : Hash(String, Type)Source
Checks that the underlying value is Hash
, and returns its value. Raises otherwise.
def as_h? : Hash(String, Type)?Source
Checks that the underlying value is Hash
, and returns its value. Returns nil
otherwise.
def as_s : StringSource
Checks that the underlying value is String
, and returns its value. Raises otherwise.
def as_s? : String?Source
Checks that the underlying value is String
, and returns its value. Returns nil
otherwise.
def each(&block)Source
def raw : JSON::TypeSource
Returns the raw underlying value, a JSON::Type
.
© 2012–2017 Manas Technology Solutions.
Licensed under the Apache License, Version 2.0.
https://crystal-lang.org/api/0.22.0/JSON/Any.html