On 8/1/20 14:41, MG wrote: > Hmmm, I am for consistency, but at least I use very few maps as compared to > lists, and rarely ever output the size of a map, but constantly for > lists, so having getSize() on List would still be beneficial.
You're free to add whatever you want to your metaClass :-) > > This has of course been discussed many times before - maybe a "size" operator: > > #list // list.size() > #map // map.size() > #string // string.length Now, this is not a completely bad idea. I spent a few years programming in Lua, and that's what the # operator does for strings and tables (arrays) i think the # symbol is not being used in Groovy anywhere but I may be mistaken. They would need to change the language's grammar, though. I'm all for using symbols for syntactic sugar. And why limit ourselves to ASCII-7 when we have the whole Unicode set to choose from!! :-) BBB > > which people could override (e.g. sizeOf() method) and which unifies all > kinds of "how many elements do I hold / how big am I" concepts (if its not > a collection holding items) ?-) > > Cheers, > mg > > > On 01/08/2020 18:08, OCsite wrote: >> MG, >> >>> On 1 Aug 2020, at 14:59, MG <mg...@arscreat.com >>> <mailto:mg...@arscreat.com>> wrote: >>> What was the reason again Groovy does not add getSize() here... ?-) >> >> Consistency I guess. Having a List.size would lead to a request to add >> Map.size, which alas would clash with Map['size']. >> >> All the best, >> OC >> >>> On 01/08/2020 04:06, Paul King wrote: >>>> What Daniel said is correct. Also if there was an accessible getSize() >>>> method, you could use just ".size". >>>> >>>> Cheers, Paul. >>>> >>>> On Sat, Aug 1, 2020 at 11:19 AM Daniel Sun <sun...@apache.org >>>> <mailto:sun...@apache.org>> wrote: >>>> >>>> >>>> The parentheses of methods without parameters could not be ommitted. >>>> >>>> `[1, 2, 3].size` is accessing the private field `size` of `ArrayList`, >>>> so illegal reflective access warning will be thrown. >>>> >>>> Cheers, >>>> Daniel Sun >>>> On 2020/08/01 00:49:54, paul <pl.grue...@gmail.com >>>> <mailto:pl.grue...@gmail.com>> wrote: >>>> > Hi all, >>>> > >>>> > (on latest groovy 3.0.5 and OpenJDK 14) omitting the empty >>>> parentheses to the .size() call works, but throws an illegal reflective >>>> access >>>> warning: >>>> > >>>> > ``` >>>> > groovy:000> [1,2,3].size >>>> > WARNING: An illegal reflective access operation has occurred >>>> > WARNING: Illegal reflective access by >>>> org.codehaus.groovy.reflection.ReflectionUtils >>>> (file:/home/paul/.sdkman/candidates/groovy/3.0.5/lib/groovy-3.0.5.jar) >>>> to field java.util.ArrayList.size >>>> > WARNING: Please consider reporting this to the maintainers of >>>> org.codehaus.groovy.reflection.ReflectionUtils >>>> > WARNING: Use --illegal-access=warn to enable warnings of further >>>> illegal reflective access operations >>>> > WARNING: All illegal access operations will be denied in a future >>>> release >>>> > ===> 3 >>>> > ``` >>>> > >>>> > Curiously, the size() method seems to be the only parameter-less >>>> method where I can >>>> > omit the empty parentheses – all others throw a >>>> MissingPropertyException (as expected). >>>> > >>>> > What is the desired behaviour, and why is it even working (albeit >>>> with warnings) with .size ? >>>> > >>>> > >>>> > best >>>> > paul >>>> > -- >>>> > typed with Neo 2 -- an ergonomically optimized keyboard layout >>>> > for German, English, programming, and science >>>> > ❤ http://neo-layout.org <http://neo-layout.org/> >>>> > ❤ https://useplaintext.email <https://useplaintext.email/> >>>> > ❤ YY-MM-DD dates (ISO 8601/RFC 3339) >>>> > � UTF-8 encoding >>>> > >>>> >>> >> >
