Simon, Thanks for the information. Ordering the book at this moment.
On 30 June 2016 at 02:35, Simon Ritchie <simonritchie...@gmail.com> wrote: > By the way, this is covered by in Donovan & Kernighan's new book The Go > Programming Language. On pages 197 and 198 of the first edition, they > describe an interface Expr, representing an expression, then five concrete > types that satisfy that interface and contain different sorts of > expressions and sub expressions. Since they all implement the Expr type, > you can write a method that can receive and return any or all of them. > > However, there are some subtleties which can trip you up. Once you start > using interfaces rather than concrete types, you are pretty quickly forced > into using pointers rather than objects. Go does a pretty good job of > hiding some of the details of this, but not a complete job. > > Interfaces are also crucial to a lot of testing strategies, because using > them allows you to easily mock up objects with the values that you need for > your tests. > > Unfortunately, this means that somebody new to Go has to get their head > around quite a few tricky ideas before they can do anything useful. They > are all explained in the book, but you need to read the relevant sections > carefully, do a few experiments and then read them again and again until it > becomes clear. > > The great thing about Kernighan's writing style is that he says everything > he needs to say exactly once and using the minimum of words. The thing > that often causes his readers problems is that he says everything he needs > to say exactly once and using the minimum of words. > > -- > You received this message because you are subscribed to a topic in the > Google Groups "golang-nuts" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/golang-nuts/OnRivRrXE40/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
