Go solutions for week 135

3 files changed, 131 insertions, 0 deletions

diff --git a/challenge-135/abigail/README.md b/challenge-135/abigail/README.md
index b0164d2fd2..14b229d5a9 100644
--- a/challenge-135/abigail/README.md
+++ b/challenge-135/abigail/README.md
@@ -5,6 +5,7 @@
 * [AWK](awk/ch-1.awk)
 * [Bash](bash/ch-1.sh)
 * [C](c/ch-1.c)
+* [Go](go/ch-1.go)
 * [Lua](lua/ch-1.lua)
 * [Node.js](node/ch-1.js)
 * [Perl](perl/ch-1.pl)
@@ -17,6 +18,7 @@
 * [AWK](awk/ch-2.awk)
 * [Bash](bash/ch-2.sh)
 * [C](c/ch-2.c)
+* [Go](go/ch-2.go)
 * [Lua](lua/ch-2.lua)
 * [Node.js](node/ch-2.js)
 * [Perl](perl/ch-2.pl)
diff --git a/challenge-135/abigail/go/ch-1.go b/challenge-135/abigail/go/ch-1.go
new file mode 100644
index 0000000000..7a8c7350b5
--- /dev/null
+++ b/challenge-135/abigail/go/ch-1.go
@@ -0,0 +1,67 @@
+package main
+
+//
+// See ../README.md
+//
+
+//
+// Run as: go run ch-1.go
+//
+
+import (
+    "fmt"
+    "bufio"
+    "os"
+    "strings"
+)
+
+func main () {
+    var reader = bufio . NewReader (os. Stdin)
+  main_loop:
+    for {
+        var text, err = reader . ReadString ('\n')
+        if (err != nil) {
+            break
+        }
+        //
+        // Get rid of newline
+        //
+        text = strings . TrimRight (text, "\n")
+
+        //
+        // Remove leading sign, if any
+        //
+        if (text [0:1] == "-" || text [0:1] == "+") {
+            text = text [1:]
+        }
+
+        //
+        // Check if each character is a number
+        //
+        for _, rune := range text {
+            if rune < '0' || rune > '9' {
+                fmt . Print ("not an integer\n")
+                continue main_loop
+            }
+        }
+        
+        //
+        // Check for even length
+        //
+        if len (text) % 2 == 0 {
+            fmt . Print ("even number of digits\n")
+            continue main_loop
+        }
+
+        //
+        // Long enough?
+        //
+        if len (text) < 3 {
+            fmt . Print ("too short\n")
+            continue main_loop
+        }
+
+        fmt . Printf ("%s\n", text [(len (text) - 3) / 2 :
+                                    (len (text) + 3) / 2])
+    }
+}
diff --git a/challenge-135/abigail/go/ch-2.go b/challenge-135/abigail/go/ch-2.go
new file mode 100644
index 0000000000..bb8e636c00
--- /dev/null
+++ b/challenge-135/abigail/go/ch-2.go
@@ -0,0 +1,62 @@
+package main
+
+//
+// See ../README.md
+//
+
+//
+// Run as: go run ch-2.go
+//
+
+import (
+    "fmt"
+    "bufio"
+    "os"
+    "strings"
+    "regexp"
+)
+
+func main () {
+    var reader = bufio . NewReader (os. Stdin)
+    var w      = [] rune {1, 3, 1, 7, 3, 9, 1}
+    for {
+        var text, err = reader . ReadString ('\n')
+        if (err != nil) {
+            break
+        }
+
+        //
+        // Remove trailing newline
+        //
+        text = strings . TrimRight (text, "\n")
+
+        //
+        // Syntax check
+        //
+        match, _ := regexp . MatchString (
+            "^[0-9BCDFGHJKLMNPQRSTVWXYZ]{6}[0-9]$", text)
+
+        if !match {
+            fmt . Print ("0\n")
+            continue
+        }
+
+        //
+        // Check sum
+        //
+        var check rune = 0
+        for i, rune := range text {
+            if rune <= '9' {
+                rune -= '0'
+            } else {
+                rune -= 'A'
+            }
+            check += w [i] * rune
+        }
+        if check % 10 == 0 {
+            fmt . Print ("1\n")
+        } else {
+            fmt . Print ("0\n")
+        }
+    }
+}