ActiveGo 1.8Package strings
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func Compare ¶
func Compare(a, b string) int
Compare returns an integer comparing two strings lexicographically. The result will be 0 if a==b, -1 if a < b, and +1 if a > b.
Compare is included only for symmetry with package bytes. It is usually clearer and always faster to use the built-in string comparison operators ==, <, >, and so on.
func Contains ¶
func Contains(s, substr string) bool
Contains reports whether substr is within s.
▹ Example
func ContainsAny ¶
func ContainsAny(s, chars string) bool
ContainsAny reports whether any Unicode code points in chars are within s.
▹ Example
func ContainsRune ¶
func ContainsRune(s string, r rune) bool
ContainsRune reports whether the Unicode code point r is within s.
func Count ¶
func Count(s, sep string) int
Count counts the number of non-overlapping instances of sep in s. If sep is an empty string, Count returns 1 + the number of Unicode code points in s.
▹ Example
func EqualFold ¶
func EqualFold(s, t string) bool
EqualFold reports whether s and t, interpreted as UTF-8 strings, are equal under Unicode case-folding.
▹ Example
func Fields ¶
func Fields(s string) []string
Fields splits the string s around each instance of one or more consecutive white space characters, as defined by unicode.IsSpace, returning an array of substrings of s or an empty list if s contains only white space.
▹ Example
func FieldsFunc ¶
func FieldsFunc(s string, f func(rune) bool) []string
FieldsFunc splits the string s at each run of Unicode code points c satisfying f(c) and returns an array of slices of s. If all code points in s satisfy f(c) or the string is empty, an empty slice is returned. FieldsFunc makes no guarantees about the order in which it calls f(c). If f does not return consistent results for a given c, FieldsFunc may crash.
▹ Example
func HasPrefix ¶
func HasPrefix(s, prefix string) bool
HasPrefix tests whether the string s begins with prefix.
▹ Example
func HasSuffix ¶
func HasSuffix(s, suffix string) bool
HasSuffix tests whether the string s ends with suffix.
▹ Example
func Index ¶
func Index(s, sep string) int
Index returns the index of the first instance of sep in s, or -1 if sep is not present in s.
▹ Example
func IndexAny ¶
func IndexAny(s, chars string) int
IndexAny returns the index of the first instance of any Unicode code point from chars in s, or -1 if no Unicode code point from chars is present in s.
▹ Example
func IndexByte ¶
func IndexByte(s string, c byte) int
IndexByte returns the index of the first instance of c in s, or -1 if c is not present in s.
func IndexFunc ¶
func IndexFunc(s string, f func(rune) bool) int
IndexFunc returns the index into s of the first Unicode code point satisfying f(c), or -1 if none do.
▹ Example
func IndexRune ¶
func IndexRune(s string, r rune) int
IndexRune returns the index of the first instance of the Unicode code point r, or -1 if rune is not present in s. If r is utf8.RuneError, it returns the first instance of any invalid UTF-8 byte sequence.
▹ Example
func Join ¶
func Join(a []string, sep string) string
Join concatenates the elements of a to create a single string. The separator string sep is placed between elements in the resulting string.
▹ Example
func LastIndex ¶
func LastIndex(s, sep string) int
LastIndex returns the index of the last instance of sep in s, or -1 if sep is not present in s.
▹ Example
func LastIndexAny ¶
func LastIndexAny(s, chars string) int
LastIndexAny returns the index of the last instance of any Unicode code point from chars in s, or -1 if no Unicode code point from chars is present in s.
func LastIndexByte ¶
func LastIndexByte(s string, c byte) int
LastIndexByte returns the index of the last instance of c in s, or -1 if c is not present in s.
func LastIndexFunc ¶
func LastIndexFunc(s string, f func(rune) bool) int
LastIndexFunc returns the index into s of the last Unicode code point satisfying f(c), or -1 if none do.
func Map ¶
func Map(mapping func(rune) rune, s string) string
Map returns a copy of the string 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.
▹ Example
func Repeat ¶
func Repeat(s string, count int) string
Repeat returns a new string consisting of count copies of the string s.
It panics if count is negative or if the result of (len(s) * count) overflows.
▹ Example
func Replace ¶
func Replace(s, old, new string, n int) string
Replace returns a copy of the string s with the first n non-overlapping instances of old replaced by new. If old is empty, it matches at the beginning of the string and after each UTF-8 sequence, yielding up to k+1 replacements for a k-rune string. If n < 0, there is no limit on the number of replacements.
▹ Example
func Split ¶
func Split(s, sep string) []string
Split slices s into all substrings separated by sep and returns a slice of the substrings between those separators. If sep is empty, Split splits after each UTF-8 sequence. It is equivalent to SplitN with a count of -1.
▹ Example
func SplitAfter ¶
func SplitAfter(s, sep string) []string
SplitAfter slices s into all substrings after each instance of sep and returns a slice of those substrings. If sep is empty, SplitAfter splits after each UTF-8 sequence. It is equivalent to SplitAfterN with a count of -1.
▹ Example
func SplitAfterN ¶
func SplitAfterN(s, sep string, n int) []string
SplitAfterN slices s into substrings after each instance of sep and returns a slice of those substrings. If sep is empty, SplitAfterN splits after each UTF-8 sequence. The count determines the number of substrings to return:
n > 0: at most n substrings; the last substring will be the unsplit remainder. n == 0: the result is nil (zero substrings) n < 0: all substrings
▹ Example
func SplitN ¶
func SplitN(s, sep string, n int) []string
SplitN slices s into substrings separated by sep and returns a slice of the substrings between those separators. If sep is empty, SplitN splits after each UTF-8 sequence. The count determines the number of substrings to return:
n > 0: at most n substrings; the last substring will be the unsplit remainder. n == 0: the result is nil (zero substrings) n < 0: all substrings
▹ Example
func Title ¶
func Title(s string) string
Title returns a copy of the string s with all Unicode letters that begin words mapped to their title case.
BUG(rsc): The rule Title uses for word boundaries does not handle Unicode punctuation properly.
▹ Example
func ToLower ¶
func ToLower(s string) string
ToLower returns a copy of the string s with all Unicode letters mapped to their lower case.
▹ Example
func ToLowerSpecial ¶
func ToLowerSpecial(c unicode.SpecialCase, s string) string
ToLowerSpecial returns a copy of the string s with all Unicode letters mapped to their lower case, giving priority to the special casing rules.
func ToTitle ¶
func ToTitle(s string) string
ToTitle returns a copy of the string s with all Unicode letters mapped to their title case.
▹ Example
func ToTitleSpecial ¶
func ToTitleSpecial(c unicode.SpecialCase, s string) string
ToTitleSpecial returns a copy of the string s with all Unicode letters mapped to their title case, giving priority to the special casing rules.
func ToUpper ¶
func ToUpper(s string) string
ToUpper returns a copy of the string s with all Unicode letters mapped to their upper case.
▹ Example
func ToUpperSpecial ¶
func ToUpperSpecial(c unicode.SpecialCase, s string) string
ToUpperSpecial returns a copy of the string s with all Unicode letters mapped to their upper case, giving priority to the special casing rules.
func Trim ¶
func Trim(s string, cutset string) string
Trim returns a slice of the string s with all leading and trailing Unicode code points contained in cutset removed.
▹ Example
func TrimFunc ¶
func TrimFunc(s string, f func(rune) bool) string
TrimFunc returns a slice of the string s with all leading and trailing Unicode code points c satisfying f(c) removed.
func TrimLeft ¶
func TrimLeft(s string, cutset string) string
TrimLeft returns a slice of the string s with all leading Unicode code points contained in cutset removed.
func TrimLeftFunc ¶
func TrimLeftFunc(s string, f func(rune) bool) string
TrimLeftFunc returns a slice of the string s with all leading Unicode code points c satisfying f(c) removed.
func TrimPrefix ¶
func TrimPrefix(s, prefix string) string
TrimPrefix returns s without the provided leading prefix string. If s doesn't start with prefix, s is returned unchanged.
▹ Example
func TrimRight ¶
func TrimRight(s string, cutset string) string
TrimRight returns a slice of the string s, with all trailing Unicode code points contained in cutset removed.
func TrimRightFunc ¶
func TrimRightFunc(s string, f func(rune) bool) string
TrimRightFunc returns a slice of the string s with all trailing Unicode code points c satisfying f(c) removed.
func TrimSpace ¶
func TrimSpace(s string) string
TrimSpace returns a slice of the string s, with all leading and trailing white space removed, as defined by Unicode.
▹ Example
func TrimSuffix ¶
func TrimSuffix(s, suffix string) string
TrimSuffix returns s without the provided trailing suffix string. If s doesn't end with suffix, s is returned unchanged.
▹ Example
type Reader ¶
A Reader implements the io.Reader, io.ReaderAt, io.Seeker, io.WriterTo, io.ByteScanner, and io.RuneScanner interfaces by reading from a string.
type Reader struct {
// contains filtered or unexported fields
}
func NewReader ¶
func NewReader(s string) *Reader
NewReader returns a new Reader reading from s. It is similar to bytes.NewBufferString but more efficient and read-only.
func (*Reader) Len ¶
func (r *Reader) Len() int
Len returns the number of bytes of the unread portion of the string.
func (*Reader) Read ¶
func (r *Reader) Read(b []byte) (n int, err error)
func (*Reader) ReadAt ¶
func (r *Reader) ReadAt(b []byte, off int64) (n int, err error)
func (*Reader) ReadByte ¶
func (r *Reader) ReadByte() (byte, error)
func (*Reader) ReadRune ¶
func (r *Reader) ReadRune() (ch rune, size int, err error)
func (*Reader) Reset ¶
func (r *Reader) Reset(s string)
Reset resets the Reader to be reading from s.
func (*Reader) Seek ¶
func (r *Reader) Seek(offset int64, whence int) (int64, error)
Seek implements the io.Seeker interface.
func (*Reader) Size ¶
func (r *Reader) Size() int64
Size returns the original length of the underlying string. Size is the number of bytes available for reading via ReadAt. The returned value is always the same and is not affected by calls to any other method.
func (*Reader) UnreadByte ¶
func (r *Reader) UnreadByte() error
func (*Reader) UnreadRune ¶
func (r *Reader) UnreadRune() error
func (*Reader) WriteTo ¶
func (r *Reader) WriteTo(w io.Writer) (n int64, err error)
WriteTo implements the io.WriterTo interface.
type Replacer ¶
Replacer replaces a list of strings with replacements. It is safe for concurrent use by multiple goroutines.
type Replacer struct {
// contains filtered or unexported fields
}
func NewReplacer ¶
func NewReplacer(oldnew ...string) *Replacer
NewReplacer returns a new Replacer from a list of old, new string pairs. Replacements are performed in order, without overlapping matches.
▹ Example
func (*Replacer) Replace ¶
func (r *Replacer) Replace(s string) string
Replace returns a copy of s with all replacements performed.
func (*Replacer) WriteString ¶
func (r *Replacer) WriteString(w io.Writer, s string) (n int, err error)
WriteString writes s to w with all replacements performed.
Bugs
- ☞
The rule Title uses for word boundaries does not handle Unicode punctuation properly.