On 6/11/13 11:28 PM, Rik Cabanier wrote: > You've told me that dictionary members are optional by default [1]. Why > does their IDL have '?' for most entries? Isn't that implied since every > entry is optional anyway? Consider these two dictionaries: dictionary Foo1 { DOMString member; }; dictionary Foo2 { DOMString? member; }; and this object being converted to those dictionary types: { member: undefined }. Foo1 will produce { member: "undefined" } while Foo2 will produce { member: null }. Similarly, for { member: null }, Foo1 will produce { member: "null" } while Foo2 will produce { member: null }. This has nothing to do with the fact that having "member" is optional; that just affects what happens when an object that does not have a "member" property is involved. -BorisReceived on Wednesday, 12 June 2013 03:42:58 UTC
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