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go/doc/next/6-stdlib/3-iter.md
Jes Cok fd54936ea5 doc: simplify links for release notes 
Change-Id: If9e3c5a58726ae3628d2e835d71f1a4708594c11
Reviewed-on: https://go-review.googlesource.com/c/go/+/586575
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Iterators

The new [iter] package provides the basic definitions for working with user-defined iterators.

The [slices] package adds several functions that work with iterators:

  • All returns an iterator over slice indexes and values.
  • Values returns an iterator over slice elements.
  • Backward returns an iterator that loops over a slice backward.
  • Collect collects values from an iterator into a new slice.
  • AppendSeq appends values from an iterator to an existing slice.
  • Sorted collects values from an iterator into a new slice, and then sorts the slice.
  • SortedFunc is like Sorted but with a comparison function.
  • SortedStableFunc is like SortFunc but uses a stable sort algorithm.
  • Chunk returns an iterator over consecutive sub-slices of up to n elements of a slice.

The [maps] package adds several functions that work with iterators:

  • All returns an iterator over key-value pairs from m.
  • Keys returns an iterator over keys in m.
  • Values returns an iterator over values in m.
  • Insert adds the key-value pairs from seq to m.
  • Collect collects key-value pairs from seq into a new map and returns it.