On Thu, 12 Sep 2019 at 14:55, Claude Pache <claude.pa...@gmail.com> wrote:
> Le 12 sept. 2019 à 15:33, Marco Pivetta <ocram...@gmail.com> a écrit : > > $foo[$key1][$key2] = ($foo[$key1][$key2] ?? 0) + 1; > > Marco Pivetta > > > That violates blatantly DRY (twice the exact same lengthy expression > `$foo[$key1][$key2]`), so it is not a satisfactory solution. > Agreed; it's certainly neater than all the isset() checks, but it's definitely a bit ugly. To clarify my point, the reason why people write this: $foo[$key1][$key2]++; Is not because they're lazy, it's because *it expresses their intent*. The ?key syntax was one suggestion for how to express the intent safely in that particular scenario. Another way might be that the array is initialised a different way; completely off the top of my head, something like this: $foo = new Dictionary<string, Dictionary<string, int=0>>; That could express the intent of "this variable is going to be used as an accumulator with these dimensions". The "if isset" lines, in my opinion, don't express any intent, and they don't protect against any real errors; they're just noise to work around a short-coming in the language. Regards, -- Rowan Tommins [IMSoP]
