summaryrefslogtreecommitdiff
path: root/doc/go_tutorial.html
diff options
context:
space:
mode:
authorOndřej Surý <ondrej@sury.org>2011-06-10 10:59:18 +0200
committerOndřej Surý <ondrej@sury.org>2011-06-10 10:59:18 +0200
commitc29cace1e8f3260389ea78fa4ef86d80cd5e5275 (patch)
tree947e4435053998a194caacab99bf614d8fd5bc78 /doc/go_tutorial.html
parent56135c623a865c501ab31cc940c0e22ece2673f4 (diff)
downloadgolang-c29cace1e8f3260389ea78fa4ef86d80cd5e5275.tar.gz
Imported Upstream version 2011.06.09upstream-weekly/2011.06.09
Diffstat (limited to 'doc/go_tutorial.html')
-rw-r--r--doc/go_tutorial.html54
1 files changed, 27 insertions, 27 deletions
diff --git a/doc/go_tutorial.html b/doc/go_tutorial.html
index cfdd0ec6e..d200036b0 100644
--- a/doc/go_tutorial.html
+++ b/doc/go_tutorial.html
@@ -29,9 +29,9 @@ Let's start in the usual way:
<p>
<pre> <!-- progs/helloworld.go /package/ END -->
05 package main
-<p>
+
07 import fmt &quot;fmt&quot; // Package implementing formatted I/O.
-<p>
+
09 func main() {
10 fmt.Printf(&quot;Hello, world; or Καλημέρα κόσμε; or こんにちは 世界\n&quot;)
11 }
@@ -119,19 +119,19 @@ Next up, here's a version of the Unix utility <code>echo(1)</code>:
<p>
<pre> <!-- progs/echo.go /package/ END -->
05 package main
-<p>
+
07 import (
08 &quot;os&quot;
09 &quot;flag&quot; // command line option parser
10 )
-<p>
+
12 var omitNewline = flag.Bool(&quot;n&quot;, false, &quot;don't print final newline&quot;)
-<p>
+
14 const (
15 Space = &quot; &quot;
16 Newline = &quot;\n&quot;
17 )
-<p>
+
19 func main() {
20 flag.Parse() // Scans the arg list and sets up flags
21 var s string = &quot;&quot;
@@ -479,12 +479,12 @@ open/close/read/write interface. Here's the start of <code>file.go</code>:
<p>
<pre> <!-- progs/file.go /package/ /^}/ -->
05 package file
-<p>
+
07 import (
08 &quot;os&quot;
09 &quot;syscall&quot;
10 )
-<p>
+
12 type File struct {
13 fd int // file descriptor number
14 name string // file name at Open time
@@ -601,7 +601,7 @@ the tricky standard arguments to open and, especially, to create a file:
41 O_CREATE = syscall.O_CREAT
42 O_TRUNC = syscall.O_TRUNC
43 )
-<p>
+
45 func Open(name string) (file *File, err os.Error) {
46 return OpenFile(name, O_RDONLY, 0)
47 }
@@ -632,7 +632,7 @@ each of which declares a receiver variable <code>file</code>.
61 }
62 return nil
63 }
-<p>
+
65 func (file *File) Read(b []byte) (ret int, err os.Error) {
66 if file == nil {
67 return -1, os.EINVAL
@@ -643,7 +643,7 @@ each of which declares a receiver variable <code>file</code>.
72 }
73 return int(r), err
74 }
-<p>
+
76 func (file *File) Write(b []byte) (ret int, err os.Error) {
77 if file == nil {
78 return -1, os.EINVAL
@@ -654,7 +654,7 @@ each of which declares a receiver variable <code>file</code>.
83 }
84 return int(r), err
85 }
-<p>
+
87 func (file *File) String() string {
88 return file.name
89 }
@@ -677,13 +677,13 @@ We can now use our new package:
<p>
<pre> <!-- progs/helloworld3.go /package/ END -->
05 package main
-<p>
+
07 import (
08 &quot;./file&quot;
09 &quot;fmt&quot;
10 &quot;os&quot;
11 )
-<p>
+
13 func main() {
14 hello := []byte(&quot;hello, world\n&quot;)
15 file.Stdout.Write(hello)
@@ -720,14 +720,14 @@ Building on the <code>file</code> package, here's a simple version of the Unix u
<p>
<pre> <!-- progs/cat.go /package/ END -->
05 package main
-<p>
+
07 import (
08 &quot;./file&quot;
09 &quot;flag&quot;
10 &quot;fmt&quot;
11 &quot;os&quot;
12 )
-<p>
+
14 func cat(f *file.File) {
15 const NBUF = 512
16 var buf [NBUF]byte
@@ -746,7 +746,7 @@ Building on the <code>file</code> package, here's a simple version of the Unix u
29 }
30 }
31 }
-<p>
+
33 func main() {
34 flag.Parse() // Scans the arg list and sets up flags
35 if flag.NArg() == 0 {
@@ -811,11 +811,11 @@ we have a second implementation of the <code>reader</code> interface.
31 type rotate13 struct {
32 source reader
33 }
-<p>
+
35 func newRotate13(source reader) *rotate13 {
36 return &amp;rotate13{source}
37 }
-<p>
+
39 func (r13 *rotate13) Read(b []byte) (ret int, err os.Error) {
40 r, e := r13.source.Read(b)
41 for i := 0; i &lt; r; i++ {
@@ -823,7 +823,7 @@ we have a second implementation of the <code>reader</code> interface.
43 }
44 return r, e
45 }
-<p>
+
47 func (r13 *rotate13) String() string {
48 return r13.source.String()
49 }
@@ -844,7 +844,7 @@ and use it from within a mostly unchanged <code>cat</code> function:
52 func cat(r reader) {
53 const NBUF = 512
54 var buf [NBUF]byte
-<p>
+
56 if *rot13Flag {
57 r = newRotate13(r)
58 }
@@ -937,7 +937,7 @@ arrays of integers, strings, etc.; here's the code for arrays of <code>int</code
<p>
<pre> <!-- progs/sort.go /type.*IntArray/ /Swap/ -->
33 type IntArray []int
-<p>
+
35 func (p IntArray) Len() int { return len(p) }
36 func (p IntArray) Less(i, j int) bool { return p[i] &lt; p[j] }
37 func (p IntArray) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
@@ -970,11 +970,11 @@ to implement the three methods for that type, like this:
32 shortName string
33 longName string
34 }
-<p>
+
36 type dayArray struct {
37 data []*day
38 }
-<p>
+
40 func (p *dayArray) Len() int { return len(p.data) }
41 func (p *dayArray) Less(i, j int) bool { return p.data[i].num &lt; p.data[j].num }
42 func (p *dayArray) Swap(i, j int) { p.data[i], p.data[j] = p.data[j], p.data[i] }
@@ -1065,11 +1065,11 @@ Here's a simple example.
10 a int
11 b string
12 }
-<p>
+
14 func (t *testType) String() string {
15 return fmt.Sprint(t.a) + &quot; &quot; + t.b
16 }
-<p>
+
18 func main() {
19 t := &amp;testType{77, &quot;Sunset Strip&quot;}
20 fmt.Println(t)
@@ -1347,7 +1347,7 @@ code that invokes the operation and responds to the request:
<p>
<pre> <!-- progs/server.go /type.binOp/ /^}/ -->
14 type binOp func(a, b int) int
-<p>
+
16 func run(op binOp, req *request) {
17 reply := op(req.a, req.b)
18 req.replyc &lt;- reply