http://cotocoto.jp/event/2880 ã«åå ãã¦ããã æ°ã«ãªã£ãã³ã¼ã js> "hoge".charAt(1) o js> "hoge"[1] o // å®è£ ã«ãã£ã¦ã¯ããããªããããã new String() vs. String() js> typeof("hoge") string js> typeof(String("hoge")) string js> typeof(new String("hoge")) object js> typeof(3) number js> typeof(Number(3)) number js> typeof(new Number(3)) object æåå -> æ°å¤ js> "10" - 0 10 js> "10" + 0 100 Array.fill js> new Array(10 + 1).join("*").
{{#tags}}- {{label}}
{{/tags}}