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【Rails】配列をキーでsortしたい

Posted at

配列をpriceの昇順でsortしたいとき

array = [
 {'id'=> 1, 'price'=> 300}, 
 {'id'=> 2, 'price'=> 100}
]

なんとなくキーを指定したらsortできたようなーと思ったけどできなかった。

array.sort(:price)
#=>ArgumentError (wrong number of arguments (given 1, expected 0))

sort_byでブロックの中でキーを指定する。

array.sort_by { |a| a['price'] }
#=> [{"id"=>2, "price"=>100}, {"id"=>1, "price"=>300}]

##参考

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