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Unknwon
2015-03-03 12:25:25 -05:00
parent b8c82ba4e5
commit eab1d98ba8
465 changed files with 15392 additions and 1572 deletions
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24
eBook/examples/chapter_5/booleans.go
View File

@@ -1,12 +1,12 @@
package main
import "fmt"
func main() {
bool1 := true
if bool1 {
fmt.Printf("The value is true\n")
} else {
fmt.Printf("The value is false\n")
}
}
package main
import "fmt"
func main() {
bool1 := true
if bool1 {
fmt.Printf("The value is true\n")
} else {
fmt.Printf("The value is false\n")
}
}

18
eBook/examples/chapter_5/for1.go
View File

@@ -1,9 +1,9 @@
package main
import "fmt"
func main() {
for i := 0; i < 5; i++ {
fmt.Printf("This is the %d iteration\n", i)
}
}
package main
import "fmt"
func main() {
for i := 0; i < 5; i++ {
fmt.Printf("This is the %d iteration\n", i)
}
}

24
eBook/examples/chapter_5/for2.go
View File

@@ -1,12 +1,12 @@
package main
import "fmt"
func main() {
var i int = 5
for i >= 0 {
i = i - 1
fmt.Printf("The variable i is now: %d\n", i)
}
}
package main
import "fmt"
func main() {
var i int = 5
for i >= 0 {
i = i - 1
fmt.Printf("The variable i is now: %d\n", i)
}
}

30
eBook/examples/chapter_5/for3.go
View File

@@ -1,15 +1,15 @@
package main
import "fmt"
func main() {
var i int = 5
for {
i = i - 1
fmt.Printf("The variable i is now: %d\n", i)
if i < 0 {
break
}
}
}
package main
import "fmt"
func main() {
var i int = 5
for {
i = i - 1
fmt.Printf("The variable i is now: %d\n", i)
if i < 0 {
break
}
}
}

24
eBook/examples/chapter_5/for4.go
View File

@@ -1,13 +1,13 @@
package main
func main() {
for i:=0; i<3; i++ {
for j:=0; j<10; j++ {
if j>5 {
break
}
print(j)
}
print(" ")
}
package main
func main() {
for i:=0; i<3; i++ {
for j:=0; j<10; j++ {
if j>5 {
break
}
print(j)
}
print(" ")
}
}

22
eBook/examples/chapter_5/for5.go
View File

@@ -1,11 +1,11 @@
package main
func main() {
for i := 0; i < 10; i++ {
if i == 5 {
continue
}
print(i)
print(" ")
}
}
package main
func main() {
for i := 0; i < 10; i++ {
if i == 5 {
continue
}
print(i)
print(" ")
}
}

34
eBook/examples/chapter_5/for6.go
View File

@@ -1,17 +1,17 @@
package main
import "fmt"
func main() {
LABEL1:
for i := 0; i <= 5; i++ {
for j := 0; j <= 5; j++ {
if j == 4 {
continue LABEL1
}
fmt.Printf("i is: %d, and j is: %d\n", i, j)
}
}
}
package main
import "fmt"
func main() {
LABEL1:
for i := 0; i <= 5; i++ {
for j := 0; j <= 5; j++ {
if j == 4 {
continue LABEL1
}
fmt.Printf("i is: %d, and j is: %d\n", i, j)
}
}
}

112
eBook/examples/chapter_5/for_string.go
View File

@@ -1,57 +1,57 @@
// for_string.go
package main
import "fmt"
func main() {
str := "Go is a beautiful language!"
fmt.Printf("The length of str is: %d\n", len(str))
for ix :=0; ix < len(str); ix++ {
fmt.Printf("Character on position %d is: %c \n", ix, str[ix])
}
str2 := "日本語"
fmt.Printf("The length of str2 is: %d\n", len(str2))
for ix :=0; ix < len(str2); ix++ {
fmt.Printf("Character on position %d is: %c \n", ix, str2[ix])
}
}
/* Output:
The length of str is: 27
Character on position 0 is: G
Character on position 1 is: o
Character on position 2 is:
Character on position 3 is: i
Character on position 4 is: s
Character on position 5 is:
Character on position 6 is: a
Character on position 7 is:
Character on position 8 is: b
Character on position 9 is: e
Character on position 10 is: a
Character on position 11 is: u
Character on position 12 is: t
Character on position 13 is: i
Character on position 14 is: f
Character on position 15 is: u
Character on position 16 is: l
Character on position 17 is:
Character on position 18 is: l
Character on position 19 is: a
Character on position 20 is: n
Character on position 21 is: g
Character on position 22 is: u
Character on position 23 is: a
Character on position 24 is: g
Character on position 25 is: e
Character on position 26 is: !
The length of str2 is: 9
Character on position 0 is: æ
Character on position 1 is: —
Character on position 2 is: ¥
Character on position 3 is: æ
Character on position 4 is: œ
Character on position 5 is: ¬
Character on position 6 is: è
Character on position 7 is: ª
Character on position 8 is: ž
// for_string.go
package main
import "fmt"
func main() {
str := "Go is a beautiful language!"
fmt.Printf("The length of str is: %d\n", len(str))
for ix :=0; ix < len(str); ix++ {
fmt.Printf("Character on position %d is: %c \n", ix, str[ix])
}
str2 := "日本語"
fmt.Printf("The length of str2 is: %d\n", len(str2))
for ix :=0; ix < len(str2); ix++ {
fmt.Printf("Character on position %d is: %c \n", ix, str2[ix])
}
}
/* Output:
The length of str is: 27
Character on position 0 is: G
Character on position 1 is: o
Character on position 2 is:
Character on position 3 is: i
Character on position 4 is: s
Character on position 5 is:
Character on position 6 is: a
Character on position 7 is:
Character on position 8 is: b
Character on position 9 is: e
Character on position 10 is: a
Character on position 11 is: u
Character on position 12 is: t
Character on position 13 is: i
Character on position 14 is: f
Character on position 15 is: u
Character on position 16 is: l
Character on position 17 is:
Character on position 18 is: l
Character on position 19 is: a
Character on position 20 is: n
Character on position 21 is: g
Character on position 22 is: u
Character on position 23 is: a
Character on position 24 is: g
Character on position 25 is: e
Character on position 26 is: !
The length of str2 is: 9
Character on position 0 is: æ
Character on position 1 is: —
Character on position 2 is: ¥
Character on position 3 is: æ
Character on position 4 is: œ
Character on position 5 is: ¬
Character on position 6 is: è
Character on position 7 is: ª
Character on position 8 is: ž
*/

22
eBook/examples/chapter_5/goto.go
View File

@@ -1,12 +1,12 @@
package main
func main() {
i:=0
HERE:
print(i)
i++
if i==5 {
return
}
goto HERE
package main
func main() {
i:=0
HERE:
print(i)
i++
if i==5 {
return
}
goto HERE
}

24
eBook/examples/chapter_5/goto2.go
View File

@@ -1,13 +1,13 @@
// compile error goto2.go:8: goto TARGET jumps over declaration of b at goto2.go:8
package main
import "fmt"
func main() {
a := 1
goto TARGET // compile error
b := 9
TARGET:
b += a
fmt.Printf("a is %v *** b is %v", a, b)
// compile error goto2.go:8: goto TARGET jumps over declaration of b at goto2.go:8
package main
import "fmt"
func main() {
a := 1
goto TARGET // compile error
b := 9
TARGET:
b += a
fmt.Printf("a is %v *** b is %v", a, b)
}

44
eBook/examples/chapter_5/ifelse.go
View File

@@ -1,22 +1,22 @@
package main
import "fmt"
func main() {
var first int = 10
var cond int
if first <= 0 {
fmt.Printf("first is less than or equal to 0\n")
} else if first > 0 && first < 5 {
fmt.Printf("first is between 0 and 5\n")
} else {
fmt.Printf("first is 5 or greater\n")
}
if cond = 5; cond > 10 {
fmt.Printf("cond is greater than 10\n")
} else {
fmt.Printf("cond is not greater than 10\n")
}
}
package main
import "fmt"
func main() {
var first int = 10
var cond int
if first <= 0 {
fmt.Printf("first is less than or equal to 0\n")
} else if first > 0 && first < 5 {
fmt.Printf("first is between 0 and 5\n")
} else {
fmt.Printf("first is 5 or greater\n")
}
if cond = 5; cond > 10 {
fmt.Printf("cond is greater than 10\n")
} else {
fmt.Printf("cond is not greater than 10\n")
}
}

160
eBook/examples/chapter_5/range_string.go
View File

@@ -1,80 +1,80 @@
package main
import "fmt"
func main() {
str := "Go is a beautiful language!"
fmt.Printf("The length of str is: %d\n", len(str))
for pos, char := range str {
fmt.Printf("Character on position %d is: %c \n", pos, char)
}
fmt.Println()
str2 := "Chinese: 日本語"
fmt.Printf("The length of str2 is: %d\n", len(str2))
for pos, char := range str2 {
fmt.Printf("character %c starts at byte position %d\n", char, pos)
}
fmt.Println()
fmt.Println("index int(rune) rune char bytes")
for index, rune := range str2 {
fmt.Printf("%-2d %d %U '%c' % X\n", index, rune, rune, rune, []byte(string(rune)))
}
}
/* Output:
The length of str is: 27
Character on position 0 is: G
Character on position 1 is: o
Character on position 2 is:
Character on position 3 is: i
Character on position 4 is: s
Character on position 5 is:
Character on position 6 is: a
Character on position 7 is:
Character on position 8 is: b
Character on position 9 is: e
Character on position 10 is: a
Character on position 11 is: u
Character on position 12 is: t
Character on position 13 is: i
Character on position 14 is: f
Character on position 15 is: u
Character on position 16 is: l
Character on position 17 is:
Character on position 18 is: l
Character on position 19 is: a
Character on position 20 is: n
Character on position 21 is: g
Character on position 22 is: u
Character on position 23 is: a
Character on position 24 is: g
Character on position 25 is: e
Character on position 26 is: !
The length of str2 is: 18
character C starts at byte position 0
character h starts at byte position 1
character i starts at byte position 2
character n starts at byte position 3
character e starts at byte position 4
character s starts at byte position 5
character e starts at byte position 6
character : starts at byte position 7
character starts at byte position 8
character 日 starts at byte position 9
character 本 starts at byte position 12
character 語 starts at byte position 15
index int(rune) rune char bytes
0 67 U+0043 'C' 43
1 104 U+0068 'h' 68
2 105 U+0069 'i' 69
3 110 U+006E 'n' 6E
4 101 U+0065 'e' 65
5 115 U+0073 's' 73
6 101 U+0065 'e' 65
7 58 U+003A ':' 3A
8 32 U+0020 ' ' 20
9 26085 U+65E5 '日' E6 97 A5
12 26412 U+672C '本' E6 9C AC
15 35486 U+8A9E '語' E8 AA 9E
*/
package main
import "fmt"
func main() {
str := "Go is a beautiful language!"
fmt.Printf("The length of str is: %d\n", len(str))
for pos, char := range str {
fmt.Printf("Character on position %d is: %c \n", pos, char)
}
fmt.Println()
str2 := "Chinese: 日本語"
fmt.Printf("The length of str2 is: %d\n", len(str2))
for pos, char := range str2 {
fmt.Printf("character %c starts at byte position %d\n", char, pos)
}
fmt.Println()
fmt.Println("index int(rune) rune char bytes")
for index, rune := range str2 {
fmt.Printf("%-2d %d %U '%c' % X\n", index, rune, rune, rune, []byte(string(rune)))
}
}
/* Output:
The length of str is: 27
Character on position 0 is: G
Character on position 1 is: o
Character on position 2 is:
Character on position 3 is: i
Character on position 4 is: s
Character on position 5 is:
Character on position 6 is: a
Character on position 7 is:
Character on position 8 is: b
Character on position 9 is: e
Character on position 10 is: a
Character on position 11 is: u
Character on position 12 is: t
Character on position 13 is: i
Character on position 14 is: f
Character on position 15 is: u
Character on position 16 is: l
Character on position 17 is:
Character on position 18 is: l
Character on position 19 is: a
Character on position 20 is: n
Character on position 21 is: g
Character on position 22 is: u
Character on position 23 is: a
Character on position 24 is: g
Character on position 25 is: e
Character on position 26 is: !
The length of str2 is: 18
character C starts at byte position 0
character h starts at byte position 1
character i starts at byte position 2
character n starts at byte position 3
character e starts at byte position 4
character s starts at byte position 5
character e starts at byte position 6
character : starts at byte position 7
character starts at byte position 8
character 日 starts at byte position 9
character 本 starts at byte position 12
character 語 starts at byte position 15
index int(rune) rune char bytes
0 67 U+0043 'C' 43
1 104 U+0068 'h' 68
2 105 U+0069 'i' 69
3 110 U+006E 'n' 6E
4 101 U+0065 'e' 65
5 115 U+0073 's' 73
6 101 U+0065 'e' 65
7 58 U+003A ':' 3A
8 32 U+0020 ' ' 20
9 26085 U+65E5 '日' E6 97 A5
12 26412 U+672C '本' E6 9C AC
15 35486 U+8A9E '語' E8 AA 9E
*/

50
eBook/examples/chapter_5/string_conversion2.go
View File

@@ -1,25 +1,25 @@
package main
import (
"fmt"
"strconv"
)
func main() {
var orig string = "ABC"
// var an int
var newS string
// var err error
fmt.Printf("The size of ints is: %d\n", strconv.IntSize)
// anInt, err = strconv.Atoi(origStr)
an, err := strconv.Atoi(orig)
if err != nil {
fmt.Printf("orig %s is not an integer - exiting with error\n", orig)
return
}
fmt.Printf("The integer is %d\n", an)
an = an + 5
newS = strconv.Itoa(an)
fmt.Printf("The new string is: %s\n", newS)
}
package main
import (
"fmt"
"strconv"
)
func main() {
var orig string = "ABC"
// var an int
var newS string
// var err error
fmt.Printf("The size of ints is: %d\n", strconv.IntSize)
// anInt, err = strconv.Atoi(origStr)
an, err := strconv.Atoi(orig)
if err != nil {
fmt.Printf("orig %s is not an integer - exiting with error\n", orig)
return
}
fmt.Printf("The integer is %d\n", an)
an = an + 5
newS = strconv.Itoa(an)
fmt.Printf("The new string is: %s\n", newS)
}

32
eBook/examples/chapter_5/switch1.go
View File

@@ -1,16 +1,16 @@
package main
import "fmt"
func main() {
var num1 int = 100
switch num1 {
case 98, 99:
fmt.Println("It's equal to 98")
case 100:
fmt.Println("It's equal to 100")
default:
fmt.Println("It's not equal to 98 or 100")
}
}
package main
import "fmt"
func main() {
var num1 int = 100
switch num1 {
case 98, 99:
fmt.Println("It's equal to 98")
case 100:
fmt.Println("It's equal to 100")
default:
fmt.Println("It's not equal to 98 or 100")
}
}

32
eBook/examples/chapter_5/switch2.go
View File

@@ -1,16 +1,16 @@
package main
import "fmt"
func main() {
var num1 int = 7
switch {
case num1 < 0:
fmt.Println("Number is negative")
case num1 > 0 && num1 < 10:
fmt.Println("Number is between 0 and 10")
default:
fmt.Println("Number is 10 or greater")
}
}
package main
import "fmt"
func main() {
var num1 int = 7
switch {
case num1 < 0:
fmt.Println("Number is negative")
case num1 > 0 && num1 < 10:
fmt.Println("Number is between 0 and 10")
default:
fmt.Println("Number is 10 or greater")
}
}