JavaScript オブジェクト 新しいページはコチラ
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(→.getOwnPropertySymbols 関数 ☆Edge) |
(→.getPrototypeOf 関数) |
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| 1,297行: | 1,297行: | ||
サンプル | サンプル | ||
<syntaxhighlight lang="javascript" line start="1"> | <syntaxhighlight lang="javascript" line start="1"> | ||
| + | <HTML> | ||
| + | <HEAD> | ||
| + | <TITLE>JavaScript getPrototypeOf</TITLE> | ||
| + | </HEAD> | ||
| + | <BODY> | ||
| + | JavaScript getPrototypeOf<br /> | ||
| + | <SCRIPT Language="JavaScript"> | ||
| + | <!-- | ||
| + | var obj = { | ||
| + | value:"data1", | ||
| + | writable:true, | ||
| + | enumerable:true | ||
| + | }; | ||
| + | function objFunc(){ | ||
| + | this.nValue1 = 100; | ||
| + | this.nValue2 = 200; | ||
| + | } | ||
| + | |||
| + | var objCreate1 = new objFunc(); | ||
| + | |||
| + | var prototypeCreate1 = Object.getPrototypeOf(objCreate1); | ||
| + | |||
| + | document.write("■Object.getPrototypeOf(objCreate1) vs objCreate1<BR />"); | ||
| + | document.write(prototypeCreate1.isPrototypeOf(objCreate1), "<BR />"); | ||
| + | |||
| + | Object.setPrototypeOf(obj,objCreate1); | ||
| + | |||
| + | document.write("■obj←objCreate1後 Create1 prototype vs obj prototype<BR />"); | ||
| + | document.write(prototypeCreate1.isPrototypeOf(obj), "<BR />"); | ||
| + | |||
| + | var prototypeObj = Object.getPrototypeOf(obj); | ||
| + | |||
| + | document.write("■objCreate1 prototype vs obj prototype<BR />"); | ||
| + | document.write(prototypeCreate1.isPrototypeOf(obj), "<BR />"); | ||
| + | document.write("■obj prototype vs obj prototype<BR />"); | ||
| + | document.write(prototypeObj.isPrototypeOf(obj), "<BR />"); | ||
| + | |||
| + | document.write("■obj key値,property値<BR />"); | ||
| + | for(var property in obj){ | ||
| + | document.write(property, ",",obj[property], "<BR />"); | ||
| + | } | ||
| + | |||
| + | var key = Symbol("symbol1"); | ||
| + | obj[key] = "symbol_data1"; | ||
| + | |||
| + | key = Symbol("symbol2"); | ||
| + | obj[key] = "symbol_data2"; | ||
| + | |||
| + | var symbols = Object.getOwnPropertySymbols(obj); | ||
| + | |||
| + | document.write("■symbol1", "<BR />"); | ||
| + | document.write("obj[symbols[0]] = ", obj[symbols[0]], "<BR />"); | ||
| + | document.write("symbols[0].toString() = ", symbols[0].toString(), "<BR />"); | ||
| + | |||
| + | document.write("■symbol2", "<BR />"); | ||
| + | document.write("obj[symbols[1]] = ", obj[symbols[1]], "<BR />"); | ||
| + | document.write("symbols[1].toString() = ", symbols[1].toString(), "<BR />"); | ||
| + | |||
| + | --> | ||
| + | </SCRIPT> | ||
| + | </BODY> | ||
| + | </HTML> | ||
</syntaxhighlight> | </syntaxhighlight> | ||
[[Media:JavaScript Object getPrototypeOf.html|実行結果サンプル]] | [[Media:JavaScript Object getPrototypeOf.html|実行結果サンプル]] | ||
| − | |||
== .setPrototypeOf 関数 == | == .setPrototypeOf 関数 == | ||
