types

Determining type of an object in ruby

The proper way to determine the “type” of an object, which is a wobbly term in the Ruby world, is to call object.class. Since classes can inherit from other classes, if you want to determine if an object is “of a particular type” you might call object.is_a?(ClassName) to see if object is of type ClassName or derived from it. Normally type checking … Read more

Node cannot be resolved to a type

I’ve seen similar behaviour in the past and know of two possible reasons: Your build path has somehow changed, leaving out your Node class, or the project providing it has compile errors, or similar. Given your description of the problem, this probably isn’t relevant in your case. Some Eclipse screwup. For me, this was always … Read more

No function matches the given name and argument types

Your function has a couple of smallint parameters.But in the call, you are using numeric literals that are presumed to be type integer. A string literal or string constant (‘123’) is not typed immediately. It remains type “unknown” until assigned or cast explicitly. However, a numeric literal or numeric constant is typed immediately. The manual: A numeric constant that contains neither a decimal … Read more

Passing just a type as a parameter in C#

There are two common approaches. First, you can pass System.Type This would be called like: int val = (int)GetColumnValue(columnName, typeof(int)); The other option would be to use generics: This has the advantage of avoiding the boxing and pr

Passing just a type as a parameter in C#

There are two common approaches. First, you can pass System.Type This would be called like: int val = (int)GetColumnValue(columnName, typeof(int)); The other option would be to use generics: This has the advantage of avoiding the boxing and providing some type safety, and would be called like: int val = GetColumnValue<int>(columnName);

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