"unicode/utf8"
)
-// Compare returns an integer comparing the two byte arrays lexicographically.
+// Compare returns an integer comparing two byte slices lexicographically.
// The result will be 0 if a==b, -1 if a < b, and +1 if a > b
// A nil argument is equivalent to an empty slice.
func Compare(a, b []byte) int {
return true
}
-// explode splits s into an array of UTF-8 sequences, one per Unicode character (still arrays of bytes),
-// up to a maximum of n byte arrays. Invalid UTF-8 sequences are chopped into individual bytes.
+// explode splits s into a slice of UTF-8 sequences, one per Unicode character (still slices of bytes),
+// up to a maximum of n byte slices. Invalid UTF-8 sequences are chopped into individual bytes.
func explode(s []byte, n int) [][]byte {
if n <= 0 {
n = len(s)
}
// Generic split: splits after each instance of sep,
-// including sepSave bytes of sep in the subarrays.
+// including sepSave bytes of sep in the subslices.
func genSplit(s, sep []byte, sepSave, n int) [][]byte {
if n == 0 {
return nil
return genSplit(s, sep, len(sep), -1)
}
-// Fields splits the array s around each instance of one or more consecutive white space
-// characters, returning a slice of subarrays of s or an empty list if s contains only white space.
+// Fields splits the slice s around each instance of one or more consecutive white space
+// characters, returning a slice of subslices of s or an empty list if s contains only white space.
func Fields(s []byte) [][]byte {
return FieldsFunc(s, unicode.IsSpace)
}
// FieldsFunc interprets s as a sequence of UTF-8-encoded Unicode code points.
-// It splits the array s at each run of code points c satisfying f(c) and
-// returns a slice of subarrays of s. If no code points in s satisfy f(c), an
+// It splits the slice s at each run of code points c satisfying f(c) and
+// returns a slice of subslices of s. If no code points in s satisfy f(c), an
// empty slice is returned.
func FieldsFunc(s []byte, f func(rune) bool) [][]byte {
n := 0
return a[0:na]
}
-// Join concatenates the elements of a to create a new byte array. The separator
-// sep is placed between elements in the resulting array.
-func Join(a [][]byte, sep []byte) []byte {
- if len(a) == 0 {
+// Join concatenates the elements of s to create a new byte slice. The separator
+// sep is placed between elements in the resulting slice.
+func Join(s [][]byte, sep []byte) []byte {
+ if len(s) == 0 {
return []byte{}
}
- if len(a) == 1 {
+ if len(s) == 1 {
// Just return a copy.
- return append([]byte(nil), a[0]...)
+ return append([]byte(nil), s[0]...)
}
- n := len(sep) * (len(a) - 1)
- for i := 0; i < len(a); i++ {
- n += len(a[i])
+ n := len(sep) * (len(s) - 1)
+ for _, v := range s {
+ n += len(v)
}
b := make([]byte, n)
- bp := copy(b, a[0])
- for _, s := range a[1:] {
+ bp := copy(b, s[0])
+ for _, v := range s[1:] {
bp += copy(b[bp:], sep)
- bp += copy(b[bp:], s)
+ bp += copy(b[bp:], v)
}
return b
}
-// HasPrefix tests whether the byte array s begins with prefix.
+// HasPrefix tests whether the byte slice s begins with prefix.
func HasPrefix(s, prefix []byte) bool {
return len(s) >= len(prefix) && Equal(s[0:len(prefix)], prefix)
}
-// HasSuffix tests whether the byte array s ends with suffix.
+// HasSuffix tests whether the byte slice s ends with suffix.
func HasSuffix(s, suffix []byte) bool {
return len(s) >= len(suffix) && Equal(s[len(s)-len(suffix):], suffix)
}
-// Map returns a copy of the byte array s with all its characters modified
+// Map returns a copy of the byte slice s with all its characters modified
// according to the mapping function. If mapping returns a negative value, the character is
// dropped from the string with no replacement. The characters in s and the
// output are interpreted as UTF-8-encoded Unicode code points.
func Map(mapping func(r rune) rune, s []byte) []byte {
- // In the worst case, the array can grow when mapped, making
+ // In the worst case, the slice can grow when mapped, making
// things unpleasant. But it's so rare we barge in assuming it's
// fine. It could also shrink but that falls out naturally.
maxbytes := len(s) // length of b
return nb
}
-// ToUpper returns a copy of the byte array s with all Unicode letters mapped to their upper case.
+// ToUpper returns a copy of the byte slice s with all Unicode letters mapped to their upper case.
func ToUpper(s []byte) []byte { return Map(unicode.ToUpper, s) }
-// ToLower returns a copy of the byte array s with all Unicode letters mapped to their lower case.
+// ToLower returns a copy of the byte slice s with all Unicode letters mapped to their lower case.
func ToLower(s []byte) []byte { return Map(unicode.ToLower, s) }
-// ToTitle returns a copy of the byte array s with all Unicode letters mapped to their title case.
+// ToTitle returns a copy of the byte slice s with all Unicode letters mapped to their title case.
func ToTitle(s []byte) []byte { return Map(unicode.ToTitle, s) }
-// ToUpperSpecial returns a copy of the byte array s with all Unicode letters mapped to their
+// ToUpperSpecial returns a copy of the byte slice s with all Unicode letters mapped to their
// upper case, giving priority to the special casing rules.
func ToUpperSpecial(_case unicode.SpecialCase, s []byte) []byte {
return Map(func(r rune) rune { return _case.ToUpper(r) }, s)
}
-// ToLowerSpecial returns a copy of the byte array s with all Unicode letters mapped to their
+// ToLowerSpecial returns a copy of the byte slice s with all Unicode letters mapped to their
// lower case, giving priority to the special casing rules.
func ToLowerSpecial(_case unicode.SpecialCase, s []byte) []byte {
return Map(func(r rune) rune { return _case.ToLower(r) }, s)
}
-// ToTitleSpecial returns a copy of the byte array s with all Unicode letters mapped to their
+// ToTitleSpecial returns a copy of the byte slice s with all Unicode letters mapped to their
// title case, giving priority to the special casing rules.
func ToTitleSpecial(_case unicode.SpecialCase, s []byte) []byte {
return Map(func(r rune) rune { return _case.ToTitle(r) }, s)
return true
}
-func arrayOfString(a [][]byte) []string {
- result := make([]string, len(a))
- for j := 0; j < len(a); j++ {
- result[j] = string(a[j])
+func sliceOfString(s [][]byte) []string {
+ result := make([]string, len(s))
+ for i, v := range s {
+ result[i] = string(v)
}
return result
}
// For ease of reading, the test cases use strings that are converted to byte
-// arrays before invoking the functions.
+// slices before invoking the functions.
var abcd = "abcd"
var faces = "☺☻☹"
func TestExplode(t *testing.T) {
for _, tt := range explodetests {
a := SplitN([]byte(tt.s), nil, tt.n)
- result := arrayOfString(a)
+ result := sliceOfString(a)
if !eq(result, tt.a) {
t.Errorf(`Explode("%s", %d) = %v; want %v`, tt.s, tt.n, result, tt.a)
continue
func TestSplit(t *testing.T) {
for _, tt := range splittests {
a := SplitN([]byte(tt.s), []byte(tt.sep), tt.n)
- result := arrayOfString(a)
+ result := sliceOfString(a)
if !eq(result, tt.a) {
t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, result, tt.a)
continue
func TestSplitAfter(t *testing.T) {
for _, tt := range splitaftertests {
a := SplitAfterN([]byte(tt.s), []byte(tt.sep), tt.n)
- result := arrayOfString(a)
+ result := sliceOfString(a)
if !eq(result, tt.a) {
t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, result, tt.a)
continue
func TestFields(t *testing.T) {
for _, tt := range fieldstests {
a := Fields([]byte(tt.s))
- result := arrayOfString(a)
+ result := sliceOfString(a)
if !eq(result, tt.a) {
t.Errorf("Fields(%q) = %v; want %v", tt.s, a, tt.a)
continue
func TestFieldsFunc(t *testing.T) {
for _, tt := range fieldstests {
a := FieldsFunc([]byte(tt.s), unicode.IsSpace)
- result := arrayOfString(a)
+ result := sliceOfString(a)
if !eq(result, tt.a) {
t.Errorf("FieldsFunc(%q, unicode.IsSpace) = %v; want %v", tt.s, a, tt.a)
continue
}
for _, tt := range fieldsFuncTests {
a := FieldsFunc([]byte(tt.s), pred)
- result := arrayOfString(a)
+ result := sliceOfString(a)
if !eq(result, tt.a) {
t.Errorf("FieldsFunc(%q) = %v, want %v", tt.s, a, tt.a)
}
}
}
-// Test case for any function which accepts and returns a byte array.
-// For ease of creation, we write the byte arrays as strings.
+// Test case for any function which accepts and returns a byte slice.
+// For ease of creation, we write the byte slices as strings.
type StringTest struct {
in, out string
}