I came to ruby from PHP. How could i do the next thing in ruby?
我是从PHP开发ruby的。我怎么能用ruby做下一件事呢?
$className = 'ArrayObject';
$arrayObject = new $className();
3 个解决方案
#1
27
You can do this:
你可以这样做:
arrayObject = Object::const_get('Array').new
#2
16
You can also use the following if you are using Ruby on Rails:
如果您正在使用Ruby on Rails，也可以使用以下内容:
array_object = "Array".constantize.new
#3
4
If you have a class, like for example String:
如果你有一个类，例如字符串:
a = String
a.new("Geo")
would give you a string. The same thing applies to other classes ( number & type of parameters will differ of course ).
会给你一根绳子。同样的事情也适用于其他类(参数的数量和类型当然会有所不同)。
#1
27
You can do this:
你可以这样做:
arrayObject = Object::const_get('Array').new
#2
16
You can also use the following if you are using Ruby on Rails:
如果您正在使用Ruby on Rails，也可以使用以下内容:
array_object = "Array".constantize.new
#3
4
If you have a class, like for example String:
如果你有一个类，例如字符串:
a = String
a.new("Geo")
would give you a string. The same thing applies to other classes ( number & type of parameters will differ of course ).
会给你一根绳子。同样的事情也适用于其他类(参数的数量和类型当然会有所不同)。