任天堂「今後C++は捨てJavaScriptで開発していく」

[111 デフォルトの名無しさん 2013/03/21(木) 22:06:37.77]

>>105
var a = {maxLength:0};
var b = Object.seal({maxLength:0});
var hoge0 = function hoge(x) {"use strict"; x.maxLength = 100; return x.maxLength};
var hoge1 = function hoge(x) {"use strict"; x.maxlength = 100; return x.maxlength};
hoge0(a) // => 100
hoge1(a) // => 100
hoge0(b) // => 100
hoge1(b) // TypeError: Can't add property maxlength, object is not extensible