Basics Collections

Collections are datatype's to organize data. They are tables in memory that points to other objects. Types of collections are Array,Sequence,Dictionary and Spread.

With an ISpread we create a Spreado f integers in a given range.

Mutablitity

All simple collection types are immutable, but have mutable versions - they have mutable or builder in there name.

If you update an immutable collection you create a new snapshot of that table. When you update a mutable collection you directly edit that table in memory.

But just because the collection is immutable doesn't mean that the objects inside the collection are immutable. You still can have mutable objects inside the immutable collection.

Relation to Sequence

All collections in VL are relate to IEnumerable. That means we always can use FromSequence to convert them to for example to a spread.

This also means that every Sequence type can be processed with ForEach loop. It will convert it into a Spread. With Key(KeyValuePair) we can get the keys of the dictionary and with Value(KeyValuePair) the values.

Performance

If you do a high amount of loop counts you should avoid Add(Spread). Then prefer using the splicer of the loops or Flatten afterwards. Flatten reduces Spread<Spread<>> to single Spread.

If you still have performance issues try using a SpreadBuilder.