Dyalog Forums

Often I want a readonly public field that is set once and only once in the constructor. It seems the only to accomplish this is to make it propery, and define a getter function which simply returns the underlying private property. Is this correct? Any other way to do it? This takes a lot of boiler plate code. It seems that the constructor should allow the setting of read-only fields.

Another way would be to allow (like in Ruby) the execution of code, let's say when the script is fixed, to build automatically those properties.

Stefano, isn't that what happens now in a class in dyalog? It gets executed when fixed. The problem (for me) is that I want a read-only field instantiated when the instance is created, not when the class is created or fixed.

What I was suggesting was a way to obtain executing code the structure you proposed (i.e.: a property without the setter). The ":Property" in the script prevents this from happening and []FX'ing a function that ":implements" the property getter doesn't seem to work.

StefanoLanzavecchia wrote:Another way would be to allow (like in Ruby) the execution of code, let's say when the script is fixed, to build automatically those properties.

And I believe (memory's not what it was, and I'm too busy to check), that you can assign to a readonly field at class fix time.

John, I hope so, otherwise how would a readonly field every get a value? ;)