文字列とは違い、シンボルは値を持たない。 혼토?
실험1
:papa = "33" #＜＜에러 string,number불가
cat = {name: :papa}
실험2
@:papa = "55"
cat = {name: @:papa}
@pepe = :papa <<이건 가능
실험3
instance 変数 symbol は変数じゃない！！ 型を持ってるオブジェクト
심볼은 변수가 아님 오브젝트임
12 = "hello"
↑error
これと同じレベルの話
실험4
user = { first_name: "john", last_name: "lenon" }
puts user
=> {:first_name=>"john", :last_name=>"lenon"}
```
```
dog = { "name" => "pochi", "kind" => "shibaken" }
dog = {name: "pochi", kind: "shibaken" }
```
```
user = { first_name: "john", last_name: "lenon" }
puts user
=> {:first_name=>"john", :last_name=>"lenon"}
```
cat = { name: :papa, kind: :xxx}
```
dog = { "name" => "pochi", "kind" => "shibaken" }
dog = {name: "pochi", kind: "shibaken" }
```
```
user = { first_name: "john", last_name: "lenon" }
puts user
=> {:first_name=>"john", :last_name=>"lenon"}
```
cat = { name: :papa, kind: :xxx}
2 replies
negabaro [1 day ago]
ruby1.8から 矢印必須だったけど1.9以降から省略できるように
negabaro [1 day ago]
{ :name => “foo”, :email => “hoge@com” }
↓
{ name: “foo”, email: “hoge@com” }
### Reference Link:
```
https://qiita.com/Kta-M/items/53a13ef60e14fcb41193
```
```