fix: coding style and file format for all example.

eBook/examples/chapter_13/parse/parse.go

@@ -1,51 +1,51 @@
-// parse.go
-package parse
-
-import (
-	"fmt"
-	"strings"
-	"strconv"
-)
-
-// A ParseError indicates an error in converting a word into an integer.
-type ParseError struct {
-        Index int      // The index into the space-separated list of words.
-        Word  string   // The word that generated the parse error.
-        Err error // The raw error that precipitated this error, if any.
-}
-
-// String returns a human-readable error message.
-func (e *ParseError) String() string {
-        return fmt.Sprintf("pkg parse: error parsing %q as int", e.Word)
-}
-
-// Parse parses the space-separated words in in put as integers.
-func Parse(input string) (numbers []int, err error) {
-        defer func() {
-                if r := recover(); r != nil {
-                        var ok bool
-                        err, ok = r.(error)
-                        if !ok {
-                                err = fmt.Errorf("pkg: %v", r)
-                        }
-                }
-        }()
-
-        fields := strings.Fields(input)
-        numbers = fields2numbers(fields)
-        return
-}
-
-func fields2numbers(fields []string) (numbers []int) {
-        if len(fields) == 0 {
-                panic("no words to parse")
-        }
-        for idx, field := range fields {
-                num, err := strconv.Atoi(field)
-                if err != nil {
-                        panic(&ParseError{idx, field, err})
-                }
-                numbers = append(numbers, num)
-        }
-        return
-}
+// parse.go
+package parse
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// A ParseError indicates an error in converting a word into an integer.
+type ParseError struct {
+	Index int    // The index into the space-separated list of words.
+	Word  string // The word that generated the parse error.
+	Err   error  // The raw error that precipitated this error, if any.
+}
+
+// String returns a human-readable error message.
+func (e *ParseError) String() string {
+	return fmt.Sprintf("pkg parse: error parsing %q as int", e.Word)
+}
+
+// Parse parses the space-separated words in in put as integers.
+func Parse(input string) (numbers []int, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			var ok bool
+			err, ok = r.(error)
+			if !ok {
+				err = fmt.Errorf("pkg: %v", r)
+			}
+		}
+	}()
+
+	fields := strings.Fields(input)
+	numbers = fields2numbers(fields)
+	return
+}
+
+func fields2numbers(fields []string) (numbers []int) {
+	if len(fields) == 0 {
+		panic("no words to parse")
+	}
+	for idx, field := range fields {
+		num, err := strconv.Atoi(field)
+		if err != nil {
+			panic(&ParseError{idx, field, err})
+		}
+		numbers = append(numbers, num)
+	}
+	return
+}