From: acevest <zhaoyanbai@126.com>
Date: Sat, 28 Nov 2015 08:09:00 +0000 (+0800)
Subject: learn go...
X-Git-Url: http://zhaoyanbai.com/repos/Bv9ARM.ch12.html?a=commitdiff_plain;h=7c3922f89543b21522178b102445c2bb2b8c9e64;p=acecode.git

learn go...
---

diff --git a/learn/doc/mac_bash_profile b/learn/doc/mac_bash_profile
index 1b0d2b6..3d234dd 100644
--- a/learn/doc/mac_bash_profile
+++ b/learn/doc/mac_bash_profile
@@ -5,8 +5,11 @@ HISTCONTROL=ignoreboth
 export PATH=/usr/local/sbin:$PATH
 export PATH="$(brew --prefix homebrew/php/php56)/bin:$PATH"
 export PATH=/Users/Ace/.local/bin:$PATH
+export GOBIN=/Users/Ace/.local/bin
 export PATH=/Users/Ace/workspace/github/metasploit-framework:$PATH
 export MSF_DATABASE_CONFIG=/Users/Ace/workspace/github/metasploit-framework/config/database.yml
+#多个GOPATH用';'分隔 go get会存到第一个目录
+export GOPATH=/Users/Ace/workspace/go
 export PS1="\W\$ "
 alias ll='ls -lGh'
 alias ls='ls -Gh'
diff --git a/learn/doc/vimrc b/learn/doc/vimrc
index 102abf1..a298c7e 100644
--- a/learn/doc/vimrc
+++ b/learn/doc/vimrc
@@ -72,6 +72,8 @@ set tabstop=4     " TAB的宽度
 set shiftwidth=4
 set expandtab     " TAB用空格代替，否则可用 set noexpandtab
 set cursorline
+set paste
+
 "hi CursorLine ctermbg=lightcyan cterm=BOLD
 "set cursorcolumn
 "hi CursorColumn ctermbg=lightgreen cterm=BOLD
diff --git a/learn/go/for.go b/learn/go/for.go
index 9516270..641af7f 100644
--- a/learn/go/for.go
+++ b/learn/go/for.go
@@ -42,4 +42,21 @@ func main() {
 	// 死循环
 	// for {
 	// }
+
+	es := "Go is a beautiful language."
+	fmt.Println("RawStr[", es, "] Length", len(es))
+	for i := 0; i < len(es); i++ {
+		fmt.Printf("   >Character on position %02d is: '%c' \n", i, es[i])
+	}
+
+	us := "Go语言是一个很好的程序设计语言. Absolutely!"
+	fmt.Println("RawStr[", us, "] Length", len(us))
+	for i, r := range us {
+		fmt.Printf("   >Character on position %02d is: '%c' \n", i, r)
+	}
+
+	fmt.Println("---------------------")
+	for i, r := range us {
+		fmt.Printf("   >[%02d] %5d %U '%c'\t% X\n", i, r, r, r, []byte(string(r)))
+	}
 }
diff --git a/learn/go/func.go b/learn/go/func.go
index a77fca7..ac41afc 100644
--- a/learn/go/func.go
+++ b/learn/go/func.go
@@ -15,7 +15,6 @@ import (
 	"time"
 )
 
-
 func main() {
 	defer fmt.Println("Program Exited...")
 
@@ -34,14 +33,13 @@ func main() {
 	neg := Adder()
 
 	// NOTICE 十次是两个实例的累计结果，不是独立函数调用结果
-	for i:=0; i<10; i++ {
+	for i := 0; i < 10; i++ {
 		fmt.Printf("Positive: %5d         Negative: %5d\n", pos(i), neg(-i*i))
 	}
 
-
 	// Fibonacci
 	fibonacci := Fibonacci()
-	for i:=0; i<10; i++ {
+	for i := 0; i < 10; i++ {
 		fmt.Printf("%02d - %5d\n", i, fibonacci())
 	}
 }
@@ -60,14 +58,13 @@ func Adder() func(int) int {
 	return innerfunc
 }
 
-
 func Fibonacci() func() int {
 	a := 0
 	b := 1
 	// a, b := 0, 1
 	innerfunc := func() int {
 		t := b
-		b = a+b
+		b = a + b
 		a = t
 		//a, b = b, a+b
 		return a
diff --git a/learn/go/hello.go b/learn/go/hello.go
index 5ae0f15..6589509 100644
--- a/learn/go/hello.go
+++ b/learn/go/hello.go
@@ -3,6 +3,15 @@ package main
 import "fmt"
 import "math/rand"
 import "time"
+import "os"
+import "unicode"
+import "runtime"
+
+// init 函数是非常特殊的函数，它不能被人为调用，而是在
+// 每个包完成初始化后自动执行，并且执行优先级比main函数高
+func init() {
+	fmt.Println("INIT FUNC")
+}
 
 func GetStr() (string, string) {
 	// 常量可以是数字、字符串、布尔或字符
@@ -56,7 +65,7 @@ var xa, xb, xc = true, "xb", 0xDD
 
 func main() {
 	// defer 的参数会立刻生成，但是只是在程序结束时调用
-	defer fmt.Println("----------------")
+	defer fmt.Println("----------------", runtime.GOOS)
 	rand.Seed(time.Now().UnixNano())
 	n := 0
 	for i := 0; i < rand.Intn(10)+1; i++ {
@@ -109,4 +118,13 @@ func main() {
 	*pj = 123
 
 	fmt.Println(n, *pi, *pj, pi, pj)
+
+	var HOME = os.Getenv("HOME")
+	var USER = os.Getenv("USER")
+	var GOPATH = os.Getenv("GOPATH")
+
+	fmt.Println("HOME", HOME, "USER", USER, "GOPATH", GOPATH)
+
+	var charA, charB, charC rune = 'a', '3', ' '
+	fmt.Println(unicode.IsLetter(charA), unicode.IsDigit(charB), unicode.IsSpace(charC))
 }
diff --git a/learn/go/interfaces.go b/learn/go/interfaces.go
index 2158b45..e038657 100644
--- a/learn/go/interfaces.go
+++ b/learn/go/interfaces.go
@@ -7,11 +7,12 @@
  * ------------------------------------------------------------------------
  */
 package main
+
 import (
-    "fmt"
+	"fmt"
 )
 
 func main() {
-    defer fmt.Println("Program Exited...")
+	defer fmt.Println("Program Exited...")
 
 }
diff --git a/learn/go/iota.go b/learn/go/iota.go
new file mode 100644
index 0000000..6d050b6
--- /dev/null
+++ b/learn/go/iota.go
@@ -0,0 +1,39 @@
+/*
+ * ------------------------------------------------------------------------
+ *   File Name: iota.go
+ *      Author: Zhao Yanbai
+ *              2015-11-28 14:23:24 Saturday CST
+ * Description: none
+ * ------------------------------------------------------------------------
+ */
+package main
+
+import (
+	"fmt"
+)
+
+const (
+	_  = iota
+	KB = 1 << (10 * iota)
+	MB
+	GB
+	TB
+	PB
+	EB
+	ZB
+	YB
+)
+
+const (
+	Active = 1 << iota
+	Send
+	Receive
+)
+
+func main() {
+	defer fmt.Println("Program Exited...")
+
+	fmt.Printf("0x%X 0x%X 0x%X 0x%X\n", KB, MB, GB, TB)
+
+	fmt.Printf("0x%X 0x%X 0x%X\n", Active, Send, Receive)
+}
diff --git a/learn/go/methods.go b/learn/go/methods.go
index d7487da..8ceec3f 100644
--- a/learn/go/methods.go
+++ b/learn/go/methods.go
@@ -7,18 +7,18 @@
  * ------------------------------------------------------------------------
  */
 package main
+
 import (
-    "fmt"
-    "math"
-    "time"
-    "math/rand"
+	"fmt"
+	"math"
+	"math/rand"
+	"time"
 )
 
 type Vector struct {
 	x, y float64
 }
 
-
 // 不用指针型也可以
 // 此处于C语言同理，用指针能改变则用指针拷贝
 // 用值则用值拷贝，指针一般更有效率，可以修改
@@ -29,8 +29,8 @@ func (v *Vector) Abs() float64 {
 
 // 可以将v换成非指针型对比
 func (v *Vector) Scale(scale float64) {
-	v.x = v.x*scale
-	v.y = v.y*scale
+	v.x = v.x * scale
+	v.y = v.y * scale
 }
 
 // fmt中的一个接口
@@ -42,16 +42,15 @@ func (v Vector) String() string {
 	return fmt.Sprintf("Vector{x:%.4f, y:%.4f}", v.x, v.y)
 }
 
-
 // 根据现有类型定义专用类型
-type FloatType float64;
+type FloatType float64
 
 func (f FloatType) TenTimesInt() int {
-	return int(f*10)
+	return int(f * 10)
 }
 
 func main() {
-    defer fmt.Println("Program Exited...")
+	defer fmt.Println("Program Exited...")
 
 	rand.Seed(time.Now().UnixNano())
 
@@ -70,7 +69,6 @@ func main() {
 	fmt.Println(v1.Abs())
 	fmt.Println(v2.Abs())
 
-
 	f := FloatType(rand.Float64())
 	fmt.Printf("Float: %7.4f  Ten Times Integer: %2d\n", f, f.TenTimesInt())
 }
diff --git a/learn/go/string.go b/learn/go/string.go
new file mode 100644
index 0000000..b11352e
--- /dev/null
+++ b/learn/go/string.go
@@ -0,0 +1,75 @@
+/*
+ * ------------------------------------------------------------------------
+ *   File Name: string.go
+ *      Author: Zhao Yanbai
+ *              2015-11-28 14:44:55 Saturday CST
+ * Description: none
+ * ------------------------------------------------------------------------
+ */
+package main
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	defer fmt.Println("Program Exited...")
+
+	interpretString := "这是一个解释型字符串.\n\\n会换行"
+	fmt.Println(interpretString)
+
+	nonInterpretString := `这是一个解释型字符串.\n不会换行`
+	fmt.Println(nonInterpretString)
+
+	// 纯ASCII字符串可以通过标准索引法来获取 如s[i]
+	// 对字符串取地址非法 &s[i]
+
+	var str string = "This is an example of a string. [这是一个中文示例字符串]"
+	fmt.Println(strings.HasPrefix(str, "This"))
+	fmt.Println(strings.HasSuffix(str, "string"))
+	fmt.Println(strings.Contains(str, "example"))
+	fmt.Println(strings.LastIndex(str, "example"))
+	fmt.Println(strings.IndexRune(str, '中'))
+	fmt.Println(strings.Index(str, "hello"))
+	fmt.Println(strings.Count(str, "a"))
+
+	str = strings.Replace(str, "example", "示例", -1) // -1表示替换所有
+	fmt.Println(str)
+
+	var repeat string = "Repeat "
+	fmt.Println("Repeat:", strings.Repeat(repeat, 10))
+	fmt.Println("ToUpper:", strings.ToUpper(repeat))
+	fmt.Println("ToLower:", strings.ToLower(repeat))
+
+	str = "    This is a string    "
+	fmt.Printf("RawStr:[%s]\n", str)
+	fmt.Printf("TrimLeft:[%s]\n", strings.TrimLeft(str, " "))
+	fmt.Printf("TrimRight:[%s]\n", strings.TrimRight(str, " "))
+	fmt.Printf("TrimSpace:[%s]\n", strings.TrimSpace(str))
+
+	str = "------This is another string---"
+	fmt.Printf("RawStr:[%s]\n", str)
+	fmt.Printf("Trim:[%s]\n", strings.Trim(str, "--"))
+
+	str = "This-is-a-string-to-be-splited"
+	fmt.Printf("RawStr:[%s]\n", str)
+	for _, s := range strings.Split(str, "-") {
+		fmt.Println(s)
+	}
+
+	str = "This is a string to be splited into word by strins.Fields"
+	fmt.Printf("RawStr:[%s]\n", str)
+	strfields := strings.Fields(str)
+	for _, s := range strfields {
+		fmt.Println(s)
+	}
+	fmt.Printf("JoinStr By ':' : [%s]\n", strings.Join(strfields, ":"))
+
+	fmt.Println("strconv Itoa: ", strconv.Itoa(123))
+	val, err := strconv.Atoi("321")
+	if err == nil {
+		fmt.Println("strconv Atoi: ", val)
+	}
+}
diff --git a/learn/go/switch.go b/learn/go/switch.go
index 7af3e24..fd8b6c3 100644
--- a/learn/go/switch.go
+++ b/learn/go/switch.go
@@ -7,6 +7,12 @@ import (
 	"time"
 )
 
+func getTwoRandInt() (a, b int) {
+	a = rand.Int()
+	b = rand.Int()
+	return
+}
+
 func main() {
 	rand.Seed(time.Now().UnixNano())
 	fmt.Print("Go runs on ")
@@ -50,4 +56,12 @@ func main() {
 		fmt.Println("Ground")
 	}
 
+	switch a, b := getTwoRandInt(); {
+	case a < b:
+		fmt.Println(a, "<", b)
+	case a == b:
+		fmt.Println(a, "=", b)
+	case a > b:
+		fmt.Println(a, ">", b)
+	}
 }
diff --git a/learn/go/var.go b/learn/go/var.go
new file mode 100644
index 0000000..e93c356
--- /dev/null
+++ b/learn/go/var.go
@@ -0,0 +1,22 @@
+/*
+ * ------------------------------------------------------------------------
+ *   File Name: var.go
+ *      Author: Zhao Yanbai
+ *              2015-11-28 13:47:31 Saturday CST
+ * Description: none
+ * ------------------------------------------------------------------------
+ */
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	defer fmt.Println("Program Exited...")
+
+	var HOME = os.Getenv("HOME")
+
+	fmt.Println(HOME)
+}
diff --git a/tools/comm/cs b/tools/comm/cs
index 3c96990..f9cb854 100755
--- a/tools/comm/cs
+++ b/tools/comm/cs
@@ -92,10 +92,10 @@ foreach my $file (@ARGV) {
     } elsif($index eq "go") {
         $as .= "package main\n";
         $as .= "import (\n";
-        $as .= "    \"fmt\"\n";
+        $as .= "\t\"fmt\"\n";
         $as .= ")\n\n";
         $as .= "func main() {\n";
-        $as .= "    defer fmt.Println(\"Program Exited...\")\n\n";
+        $as .= "\tdefer fmt.Println(\"Program Exited...\")\n\n";
         $as .= "}";
         $as = "" unless($create_main);
     } elsif($index eq "py") {