ArrayList iterator, unifying API of HashMap and its derivatives #981
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BraedonWooding
commented
May 3, 2018
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| pub fn next(it: &Iterator) ?T { | ||
| if (it.count >= it.list.len) return null; | ||
| const val = it.list.at(it.count); |
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@andrewrk Currently this seems like the best way to do it? Though I think I could also just index the .items property since I do check bounds.
phase
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May 3, 2018
| try list.insertSlice(0, items[0..0]); | ||
| assert(list.items[0] == 5); | ||
| } | ||
| } |
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The newlines were removed from the end of all the files you modified.
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Didn't remember having them be part of a standard, if they are I'll add them back; just my visual studio code having its own mind :).
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Thanks! Looks good |
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This PR just does a small little unification; adding 'count' function to hashmap, arraylist, bufmap, and bufset (which just returns the inner storage value), this is more intended for as we extend the amount of data structures it is nice to have a set of API functions to follow for example having a 'count' function and so on, this makes it easier for library builders to utilise duck typing and support multiple collections in their libraries 😄.
Secondly it adds an iterator to ArrayList, again for the above reason. All iterators also have a reset function attached.
Motivation
Again to bring up my Lazy library, I support you doing queries on slices such as
Lazy.init(slice[0..]).where(odd).select(pow).toArray(buf[0..]), and when I wanted to extend it to supporting ArrayLists and Hashmaps I found a problem, they had conflicting APIs (and ArrayList had no iterator), so overall this fixes that by providing a consistent API.