I published that in
https://pharo.fogbugz.com/f/cases/16902/Improve-Array-comment
as a fix. Took me 5 min.
You can really improve user experience with 5 min!
Stef
Array is a fixed-sized collection of elements accessed by integer
indices. Contrary to the C convention, the first element of a Smalltalk
array is at position 1 and not 0. The main protocol to access array
elements is the method at: and at:put:.
- at: anInteger returns the element at index anInteger.
- at: anInteger put: anObject puts anObject at index anInteger.
Arrays are fixed-size collections therefore we cannot add or remove
elements at the end of an array.
The following code creates an array of size 5, puts values in the first
3 locations and returns the first element.
[[[
| anArray |
anArray := Array new: 5.
anArray at: 1 put: 4.
anArray at: 2 put: 3/2.
anArray at: 3 put: 'ssss'.
anArray at: 1
> 4
]]]
#() creates literal arrays with static (or “literal”) elements that have
to be known when the expression is compiled, and not when it is executed.
The following code creates an array of size 2 where the first element is
the (literal) number 1 and the second the (literal) string 'here'.
[[[
#(1 'here') size
> 2
]]]
{ } is a way to create arrays in a more dynamic manner.
[[[
| array |
array := (Array new: 2). array
at: 1 put: (Point x: 10 y: 20);
at: 2 put: (Point x: 10 y: 20).
array
]]]
is equivalent to
[[[
{(10@20) . (10@20)}
{Point x: 10 y: 20 . Point x: 10 y: 20}
]]]
Le 30/10/15 08:57, stepharo a écrit :
Hi guys
Array comment is
"I present an ArrayedCollection whose elements are objects."
Seriously this is inacceptable.
I started to improve. Now we should port some text from PBE and add it
in the class comment.
Please help this is simple super easy and this is a welcome for newbies.
Stef
