I don't think so. As we don't say "Fibonacci collection", we know Fibonacci numbers are in order. But we can't tell the number immediately if I asked a specific index of Fibonacci sequence. The only way is calculate the sequence one by one from start.
So we need the collection, and collection do the jobs. But it true that collections are sequences. Swift is also have this definition, in concrete implementation way. Dmitri Gribenko <[email protected]> 於 2015年12月31日星期四 寫道： > On Thu, Dec 31, 2015 at 3:04 PM, Susan Cheng <[email protected] > <javascript:;>> wrote: > > yes for sequences are not immutable. I get confused. > > > > no for sequences should be definition of lists of values. Just like > > Fibonacci sequence, we can calculate the values form the start of the > > Fibonacci sequence one by one. But we are not accessing the values of > > Fibonacci sequence. > > Those are collections. Collections can be iterated over multiple times. > > Dmitri > > -- > main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if > (j){printf("%d\n",i);}}} /*Dmitri Gribenko <[email protected] > <javascript:;>>*/ >
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