content: clarify that tree.New returns sorted trees

The description of the 'Equivalent Binary Trees' exercise says:

  The function tree.New constructs a randomly-structured binary tree

In the context of CS, 'binary trees' (in the 'data structure' sense)
are sorted by definition, but sometimes the term is used, expecially
in mathematics, to indicate the more general notion of a tree with at
most two children.

Since it has been reported that tour users are sometimes confused by
this (see the linked issue), clarify that the tree.New function
returns random, but *always sorted* trees.

Fixes golang/tour#270

Change-Id: Ibfca0e2a8e947a839545433d1da0f4621ea65340
Reviewed-by: Andrew Bonventre <>
Reviewed-by: Rob Phoenix <>
1 file changed
tree: a7b7d79c6e9bf3ec5bf2f836c2cc6602bf73c9bf
  1. content/
  2. gotour/
  3. pic/
  4. reader/
  5. solutions/
  6. static/
  7. template/
  8. tools/
  9. tree/
  10. wc/
  11. .gitignore
  12. app.yaml
  14. codereview.cfg
  19. TODO

A Tour of Go is an introduction to the Go programming language.

The easiest way to install the tour locally is to install a binary release of Go and then run:

$ go tool tour

To install the tour from source, first set up a workspace and then run:

$ go get

This will place a gotour binary in your workspace's bin directory.

Unless otherwise noted, the go-tour source files are distributed under the BSD-style license found in the LICENSE file.

Contributions should follow the same procedure as for the Go project: