JavaScript オブジェクト 新しいページはコチラ
提供: yonewiki
(→toString() メソッド) |
(→toLocaleString() メソッド) |
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512行: | 512行: | ||
</syntaxhighlight> | </syntaxhighlight> | ||
[[Media:JavaScript Object toLocaleString.html|実行結果サンプル]] | [[Media:JavaScript Object toLocaleString.html|実行結果サンプル]] | ||
+ | |||
+ | |||
+ | == toLocaleString() メソッド == | ||
+ | *objName1.propertyIsEnumerable(1); | ||
+ | :上記のような記述によりオブジェクトがForループのvar a in objName1のような形式で列挙できるかどうかを判定しBoolean値を返却します。特にArrayおよびStringは判定がOKになることが多いです。その他オブジェクトで要素を複数含んでいれば、trueが返却されます。 | ||
+ | |||
+ | |||
+ | サンプル | ||
+ | <syntaxhighlight lang="javascript" line start="1"> | ||
+ | <HTML> | ||
+ | <HEAD> | ||
+ | <TITLE>JavaScript メソッド.propertyIsEnumerable()</TITLE> | ||
+ | </HEAD> | ||
+ | <BODY> | ||
+ | JavaScript メソッド.propertyIsEnumerable()<br /> | ||
+ | <SCRIPT Language="JavaScript"> | ||
+ | <!-- | ||
+ | objObject = new Object; | ||
+ | objArray = new Array("HR-V", "ESTIMA", "LEXUS"); | ||
+ | objBoolean = new Boolean; | ||
+ | objDate = new Date; | ||
+ | objFunction= new Function; | ||
+ | objNumber = new Number(123500); | ||
+ | objString = new String("1234"); | ||
+ | objError = new Error("エラーが発生しました。"); | ||
+ | with(document){ | ||
+ | write("<TABLE BORDER=\"1\">\n"); | ||
+ | write("<TR>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write("Object.propertyIsEnumerable(1)\n"); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(Object.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(objObject.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("</TR>\n"); | ||
+ | write("<TR>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write("Array.propertyIsEnumerable(1)\n"); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(Array.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(objArray.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("</TR>\n"); | ||
+ | write("<TR>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write("Boolean.propertyIsEnumerable(1)\n"); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(Boolean.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(objBoolean.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("</TR>\n"); | ||
+ | write("<TR>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write("Date.propertyIsEnumerable(1)\n"); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(Date.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(objDate.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("</TR>\n"); | ||
+ | write("<TR>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write("Function.propertyIsEnumerable(1)\n"); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(Function.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(objFunction.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("</TR>\n"); | ||
+ | write("<TR>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write("Number.propertyIsEnumerable(1)\n"); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(Number.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(objNumber.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("</TR>\n"); | ||
+ | write("<TR>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write("String.propertyIsEnumerable(1)\n"); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(String.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(objString.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("</TR>\n"); | ||
+ | write("<TR>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write("Error.propertyIsEnumerable(1)\n"); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(Error.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("<TD>\n"); | ||
+ | write(objError.propertyIsEnumerable(1)); | ||
+ | write("</TD>\n"); | ||
+ | write("</TR>\n"); | ||
+ | write("</TABLE>\n"); | ||
+ | } | ||
+ | --> | ||
+ | </SCRIPT> | ||
+ | </BODY> | ||
+ | </HTML> | ||
+ | </syntaxhighlight> | ||
+ | [[Media:JavaScript Object propertyIsEnumerable.html|実行結果サンプル]] | ||
== 記事作成用テンプレート == | == 記事作成用テンプレート == |