Imported Upstream version 1.4upstream/1.4

1 files changed, 0 insertions, 131 deletions

diff --git a/src/pkg/sort/example_multi_test.go b/src/pkg/sort/example_multi_test.go
deleted file mode 100644
index ac316540f..000000000
--- a/src/pkg/sort/example_multi_test.go
+++ /dev/null
@@ -1,131 +0,0 @@
-// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package sort_test
-
-import (
-	"fmt"
-	"sort"
-)
-
-// A Change is a record of source code changes, recording user, language, and delta size.
-type Change struct {
-	user     string
-	language string
-	lines    int
-}
-
-type lessFunc func(p1, p2 *Change) bool
-
-// multiSorter implements the Sort interface, sorting the changes within.
-type multiSorter struct {
-	changes []Change
-	less    []lessFunc
-}
-
-// Sort sorts the argument slice according to the less functions passed to OrderedBy.
-func (ms *multiSorter) Sort(changes []Change) {
-	ms.changes = changes
-	sort.Sort(ms)
-}
-
-// OrderedBy returns a Sorter that sorts using the less functions, in order.
-// Call its Sort method to sort the data.
-func OrderedBy(less ...lessFunc) *multiSorter {
-	return &multiSorter{
-		less: less,
-	}
-}
-
-// Len is part of sort.Interface.
-func (ms *multiSorter) Len() int {
-	return len(ms.changes)
-}
-
-// Swap is part of sort.Interface.
-func (ms *multiSorter) Swap(i, j int) {
-	ms.changes[i], ms.changes[j] = ms.changes[j], ms.changes[i]
-}
-
-// Less is part of sort.Interface. It is implemented by looping along the
-// less functions until it finds a comparison that is either Less or
-// !Less. Note that it can call the less functions twice per call. We
-// could change the functions to return -1, 0, 1 and reduce the
-// number of calls for greater efficiency: an exercise for the reader.
-func (ms *multiSorter) Less(i, j int) bool {
-	p, q := &ms.changes[i], &ms.changes[j]
-	// Try all but the last comparison.
-	var k int
-	for k = 0; k < len(ms.less)-1; k++ {
-		less := ms.less[k]
-		switch {
-		case less(p, q):
-			// p < q, so we have a decision.
-			return true
-		case less(q, p):
-			// p > q, so we have a decision.
-			return false
-		}
-		// p == q; try the next comparison.
-	}
-	// All comparisons to here said "equal", so just return whatever
-	// the final comparison reports.
-	return ms.less[k](p, q)
-}
-
-var changes = []Change{
-	{"gri", "Go", 100},
-	{"ken", "C", 150},
-	{"glenda", "Go", 200},
-	{"rsc", "Go", 200},
-	{"r", "Go", 100},
-	{"ken", "Go", 200},
-	{"dmr", "C", 100},
-	{"r", "C", 150},
-	{"gri", "Smalltalk", 80},
-}
-
-// ExampleMultiKeys demonstrates a technique for sorting a struct type using different
-// sets of multiple fields in the comparison. We chain together "Less" functions, each of
-// which compares a single field.
-func Example_sortMultiKeys() {
-	// Closures that order the Change structure.
-	user := func(c1, c2 *Change) bool {
-		return c1.user < c2.user
-	}
-	language := func(c1, c2 *Change) bool {
-		return c1.language < c2.language
-	}
-	increasingLines := func(c1, c2 *Change) bool {
-		return c1.lines < c2.lines
-	}
-	decreasingLines := func(c1, c2 *Change) bool {
-		return c1.lines > c2.lines // Note: > orders downwards.
-	}
-
-	// Simple use: Sort by user.
-	OrderedBy(user).Sort(changes)
-	fmt.Println("By user:", changes)
-
-	// More examples.
-	OrderedBy(user, increasingLines).Sort(changes)
-	fmt.Println("By user,<lines:", changes)
-
-	OrderedBy(user, decreasingLines).Sort(changes)
-	fmt.Println("By user,>lines:", changes)
-
-	OrderedBy(language, increasingLines).Sort(changes)
-	fmt.Println("By language,<lines:", changes)
-
-	OrderedBy(language, increasingLines, user).Sort(changes)
-	fmt.Println("By language,<lines,user:", changes)
-
-	// Output:
-	// By user: [{dmr C 100} {glenda Go 200} {gri Smalltalk 80} {gri Go 100} {ken Go 200} {ken C 150} {r Go 100} {r C 150} {rsc Go 200}]
-	// By user,<lines: [{dmr C 100} {glenda Go 200} {gri Smalltalk 80} {gri Go 100} {ken C 150} {ken Go 200} {r Go 100} {r C 150} {rsc Go 200}]
-	// By user,>lines: [{dmr C 100} {glenda Go 200} {gri Go 100} {gri Smalltalk 80} {ken Go 200} {ken C 150} {r C 150} {r Go 100} {rsc Go 200}]
-	// By language,<lines: [{dmr C 100} {ken C 150} {r C 150} {gri Go 100} {r Go 100} {ken Go 200} {glenda Go 200} {rsc Go 200} {gri Smalltalk 80}]
-	// By language,<lines,user: [{dmr C 100} {ken C 150} {r C 150} {gri Go 100} {r Go 100} {glenda Go 200} {ken Go 200} {rsc Go 200} {gri Smalltalk 80}]
-
-}