如何将变量值指定为对象属性名称？ [英] How to assign variable value as the object property name?
问题描述
如何获取变量的值（在这种情况下，
MODE_CREATE，MODE_UPDATE等）并将其用作对象属性名称？
在下面的例子中我希望''oIcon''对象具有属性：
mode1，mode2和mode3。
这似乎很简单但我无法弄清楚...
任何人的想法？
var MODE_CREATE =" mode1" ;;
var MODE_UPDATE =" mode2";
var MODE_DELETE =" mode3";
var oIcon = {
MODE_CREATE：" create.gif"
，MODE_UPDATE：" update.gif"
，MODE_DELETE：" delete.gif"
};
var oTitle = {
MODE_CREATE："创建新项目......
， MODE_UPDATE：更新此项目......
，MODE_DELETE：删除此项目......
};
sn****@mxlogic.com 写道：怎么样可以获取变量的值（在这种情况下，
MODE_CREATE，MODE_UPDATE等）并将其用作对象属性名称？
在下面的示例中，我想要''oIcon ''反对拥有这些属性：
mode1，mode2和mode3。
这看起来很简单但我无法弄明白......
任何人的想法？
var MODE_CREATE =" mode1" ;;
var MODE_UPDATE =" mode2" ;;
var MODE_DELETE =" mode3" ;;
var oIcon = {
MODE_CREATE：" create.gif"
，MODE_UPDATE：" update.gif"
，MODE_DELETE：" delete.gif"
} ;
var oTitle = {
MODE_CREATE："创建新项目......
，MODE_UPDATE：更新此项目......
，MODE_DELETE：删除此项目......
};
可能不想为此目的使用对象*文字*：
标识符成为属性名而不进行评估。试试这个：
< html>
< head>
< title>无标题< / title>
< / head>
< body>
< pre>
< script type =" text / javascript">
var MODE_CREATE =" mode1" ;;
var MODE_UPDATE =" mode2";
var MODE_DELETE =" mode3";
var oIcon = Object（）;
oIcon [MODE_CREATE] =" create.gif";
oIcon [MODE_UPDATE] =" update.gif";
oIcon [MODE_DELETE] =" delete.gif";
var oTitle = Object（）;
oTitle [MODE_CREATE] ="创建新项目...... ;;
oTitle [MODE_UPDATE] ="更新此项目。 .." ;;
oTitle [MODE_DELETE] ="删除此项目..." ;;
var a = [];
a.push（'' - oIcon-\ n''）;
for（prop in oIcon）
a.push（prop +' '：''+ oIcon [pr op]）;
a.push（''\ n-oTitle-\ n''）;
for（prop in oIcon）
a.push（prop +''：''+ oTitle [prop]）;
document.writeln（a.join（''\ n''））;
< / script>
< / pre>
< / body>
< / html>
这可能是一种更系统的方法，可以避免重复...
好吧：
{eval（MODE_CREATE +''：" create.gif"''），...}
是的，我知道，不是那么优先，但不能说我已经检查了其他或
可以看到其他方式。
Danny
2005年6月29日星期三11:33:43 -0700，< sn **** @ mxlogic.com>写道：
如何获取变量的值（在这种情况下，
MODE_CREATE，MODE_UPDATE等）并将其用作对象属性名称？ br />
在下面的例子中我希望''oIcon''对象具有属性：
mode1，mode2和mode3。
这看起来很简单，但我可以'很清楚......
任何想法？
var MODE_CREATE =" mode1" ;;
var MODE_UPDATE =" mode2" ;;
var MODE_DELETE =" mode3" ;;
var oIcon = {
MODE_CREATE：" create.gif"
，MODE_UPDATE：" update.gif"
，MODE_DELETE：" delete.gif"
};
var oTitle = {
MODE_CREATE："创建新项目......
，MODE_UPDATE：更新此项目......
，MODE_DELETE：删除此项目......
};
-
使用Opera的革命性电子邮件客户端： http://www.opera.com/mail/
Danny写道：嗯：
{eval（MODE_CREATE +''：" create.gif" ''），...}
是的，我知道，不是那么优先，但不能说我已经检查了其他或者可以随便看到其他方式。
经常说，如果你考虑在javascript中使用
的 - eval - 函数，你会丢失更简单，更快，更直接，更客观更好。
或许可以找一些时间学习javascript ： -
< URL： http ：//www.jibbering.com/faq/ >
Richard。
How is it possible to take the value of a variable (in this case,
MODE_CREATE, MODE_UPDATE, etc) and use that as an object property name?
In the following example I want ''oIcon'' object to have the properties:
mode1, mode2, and mode3.
This seems simple but I can''t quite figure it out...
Any ideas anyone?
var MODE_CREATE = "mode1";
var MODE_UPDATE = "mode2";
var MODE_DELETE = "mode3";
var oIcon = {
MODE_CREATE: "create.gif"
, MODE_UPDATE: "update.gif"
, MODE_DELETE: "delete.gif"
};
var oTitle = {
MODE_CREATE: "Create a new item..."
, MODE_UPDATE: "Update this item..."
, MODE_DELETE: "Delete this item..."
};
解决方案sn****@mxlogic.com wrote:How is it possible to take the value of a variable (in this case,
MODE_CREATE, MODE_UPDATE, etc) and use that as an object property name?
In the following example I want ''oIcon'' object to have the properties:
mode1, mode2, and mode3.
This seems simple but I can''t quite figure it out...
Any ideas anyone?
var MODE_CREATE = "mode1";
var MODE_UPDATE = "mode2";
var MODE_DELETE = "mode3";
var oIcon = {
MODE_CREATE: "create.gif"
, MODE_UPDATE: "update.gif"
, MODE_DELETE: "delete.gif"
};
var oTitle = {
MODE_CREATE: "Create a new item..."
, MODE_UPDATE: "Update this item..."
, MODE_DELETE: "Delete this item..."
};
Probably don''t want to use an object *literal* for that purpose:
identifiers become property names without being evaluated. Try this:
<html>
<head>
<title>untitled</title>
</head>
<body>
<pre>
<script type="text/javascript">
var MODE_CREATE = "mode1";
var MODE_UPDATE = "mode2";
var MODE_DELETE = "mode3";
var oIcon = Object();
oIcon[MODE_CREATE] = "create.gif";
oIcon[MODE_UPDATE] = "update.gif";
oIcon[MODE_DELETE] = "delete.gif";
var oTitle = Object();
oTitle[MODE_CREATE] = "Create a new item...";
oTitle[MODE_UPDATE] = "Update this item...";
oTitle[MODE_DELETE] = "Delete this item...";
var a = [];
a.push(''-oIcon-\n'');
for (prop in oIcon)
a.push(prop + '': '' + oIcon[prop]);
a.push(''\n-oTitle-\n'');
for (prop in oIcon)
a.push(prop + '': '' + oTitle[prop]);
document.writeln(a.join(''\n''));
</script>
</pre>
</body>
</html>
Probably a more systematic way of doing this and avoiding repetition...
Well:
{eval(MODE_CREATE+'': "create.gif"''),...}
yes, I do know, is not so preferred, but can''t say I''ve checked other or
can see other ways offhand.
Danny
On Wed, 29 Jun 2005 11:33:43 -0700, <sn****@mxlogic.com> wrote:
How is it possible to take the value of a variable (in this case,
MODE_CREATE, MODE_UPDATE, etc) and use that as an object property name?
In the following example I want ''oIcon'' object to have the properties:
mode1, mode2, and mode3.
This seems simple but I can''t quite figure it out...
Any ideas anyone?
var MODE_CREATE = "mode1";
var MODE_UPDATE = "mode2";
var MODE_DELETE = "mode3";
var oIcon = {
MODE_CREATE: "create.gif"
, MODE_UPDATE: "update.gif"
, MODE_DELETE: "delete.gif"
};
var oTitle = {
MODE_CREATE: "Create a new item..."
, MODE_UPDATE: "Update this item..."
, MODE_DELETE: "Delete this item..."
};
--
Using Opera''s revolutionary e-mail client: http://www.opera.com/mail/
Danny wrote:Well:
{eval(MODE_CREATE+'': "create.gif"''),...}
yes, I do know, is not so preferred, but can''t say I''ve
checked other or can see other ways offhand.
It is often said, and more often true, that if you are considering using
the - eval - function in javascript you are missing something simpler,
faster, more direct and so objectively better.
Perhaps it might be an idea to find some time to learn javascript:-
<URL: http://www.jibbering.com/faq/ >
Richard.
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