[Newbies] Is there a Squeak idiom for array slices?
bert at freudenbergs.de
Fri Dec 18 01:59:15 UTC 2009
On 18.12.2009, at 02:51, Bert Freudenberg wrote:
> On 18.12.2009, at 02:47, Tim Rowe wrote:
>> If, for example, variable a contains an array with 20 elements, but I
>> want to inject:into: just elements 3 through 17, is there an easier
>> way than step-by-step creating a new array, copying the required
>> elements of a into it, and then doing an inject:into: on that?
> array atAll: (3 to: 17)
Though that's not really an idiom, I don't think I've ever seen that used in code. #atAll: can provide an arbitrary mapping.
More efficient and more often used are these
array copyFrom: 3 to: 17
array first: 4
array last: 5
array allButFirst: 6
array allButLast: 7
- Bert -
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