12:"$Sreact.fragment" 11:[["$","p",null,{"className":"mb-2 ","children":[[["$","code",null,{"className":"bg-stone-200 p-1 text-red-500 ","children":[["$","$12","0",{"children":[null,"_1"]}]]}],["$","span",null,{"className":"","children":[["$","$12","0",{"children":[null,"から"]}]]}],["$","code",null,{"className":"bg-stone-200 p-1 text-red-500 ","children":[["$","$12","0",{"children":[null,"_9"]}]]}],["$","span",null,{"className":"","children":[["$","$12","0",{"children":[null,"はそれぞれ1番目から9番目のblock仮引数が入っているので"]}]]}]],null]}],["$","p",null,{"className":"mb-2 ","children":[[],null]}],["$","figure",null,{"className":"mb-2","children":[["$","code",null,{"className":"hljs !md:p-4 block w-full overflow-x-scroll whitespace-pre !p-3 leading-normal mb-1","dangerouslySetInnerHTML":{"__html":"# 同じ意味\n(1..10).map {|n| n * 2 }\n(1..10).map { _1 * 2 }"}}],false]}],["$","p",null,{"className":"mb-2 ","children":[[["$","span",null,{"className":"","children":[["$","$12","0",{"children":[null,"ということができる"]}]]}]],null]}],["$","p",null,{"className":"mb-2 ","children":[[],null]}],["$","p",null,{"className":"mb-2 ","children":[[["$","span",null,{"className":"","children":[["$","$12","0",{"children":[null,"_2以降は使わなさそうだけどw"]}]]}]],null]}]]

Ruby blockの仮引数を_1で参照できる

Ruby blockの仮引数を_1で参照できる