[squeak-dev] Object>>printOn: refined.
Trygve Reenskaug
trygver at ifi.uio.no
Tue Jun 2 12:10:02 UTC 2020
I find it frustrating to open 3 inspectors on different objects, all of
them titled 'aString' (or whatever),
IMO, it is much better to open them on the 3 objects: [1234] aString,
[3456] a String, [4567 a String.
The numbers in square brackets stand for the objects /oop/, actually its
/identityHash/. They can be a 7-digit numbers; much too long for my
short-time memory to hold many of them. I therefore truncate the number
to 4 digits, accepting that I may, in rare cases, get 2 objects with the
same identifier.
I'm running 'Squeak5.3'.
*Object>>printOn: aStream*
"Append to the argument, aStream, a sequence of characters
that identifies the receiver."
" The previous version identified the class, not the instance "
" This new version identifies the instance with its oop. "
" I arbitrarily truncate the oop to 4 digits to simplify
reading. "
| title |
title := self class name.
aStream
nextPutAll: '[' , (self asOop printString truncateTo:
4) , ']' ;
nextPutAll: (title first isVowel ifTrue: ['an ']
ifFalse: ['a ']);
nextPutAll: title
Enjoy
--Trygve
--
/The essence of object orientation is that objects collaborateto achieve
a goal. /
Trygve Reenskaug mailto: trygver at ifi.uio.no <mailto:%20trygver at ifi.uio.no>
Morgedalsvn. 5A http://folk.uio.no/trygver/
N-0378 Oslo http://fullOO.info
Norway Tel: (+47) 468 58 625
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