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(s, substr string) bool
Contains reports whether substr is within s.
func ContainsAny(s, chars string) bool
ContainsAny reports whether any Unicode code points in chars are within s.
func ContainsRune(s string, r rune) bool
ContainsRune reports whether the Unicode code point r is within s.
func Count(s, substr string) int
Count counts the number of non-overlapping instances of substr in s.
If substr is an empty string, Count returns 1 + the number of Unicode code points in s.
func EqualFold(s, t string) bool
EqualFold reports whether s and t, interpreted as UTF-8 strings,
are equal under Unicode case-folding, which is a more general
form of case-insensitivity.
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 a slice of substrings of s or an
empty slice if s contains only white space.
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)
and assumes that f always returns the same value for a given c.
func HasPrefix(s, prefix string) bool
HasPrefix tests whether the string s begins with prefix.
func HasSuffix(s, suffix string) bool
HasSuffix tests whether the string s ends with suffix.
func Index(s, substr string) int
Index returns the index of the first instance of substr in s, or -1 if substr is not present in s.
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.
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(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.
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.
func Join(elems []string, sep string) string
Join concatenates the elements of its first argument to create a single string. The separator
string sep is placed between elements in the resulting string.
func LastIndex(s, substr string) int
LastIndex returns the index of the last instance of substr in s, or -1 if substr is not present in s.
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(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(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(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.
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 NewReplacer(oldnew ...string) *Replacer
NewReplacer returns a new Replacer from a list of old, new string
pairs. Replacements are performed in the order they appear in the
target string, without overlapping matches. The old string
comparisons are done in argument order.
NewReplacer panics if given an odd number of arguments.
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.
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.
func ReplaceAll(s, old, new string) string
ReplaceAll returns a copy of the string s with all
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.
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 s does not contain sep and sep is not empty, Split returns a
slice of length 1 whose only element is s.
If sep is empty, Split splits after each UTF-8 sequence. If both s
and sep are empty, Split returns an empty slice.
It is equivalent to SplitN with a count of -1.
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 s does not contain sep and sep is not empty, SplitAfter returns
a slice of length 1 whose only element is s.
If sep is empty, SplitAfter splits after each UTF-8 sequence. If
both s and sep are empty, SplitAfter returns an empty slice.
It is equivalent to SplitAfterN with a count of -1.
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.
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
Edge cases for s and sep (for example, empty strings) are handled
as described in the documentation for SplitAfter.
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.
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
Edge cases for s and sep (for example, empty strings) are handled
as described in the documentation for Split.
func Title(s string) string
Title returns a copy of the string s with all Unicode letters that begin words
mapped to their Unicode title case.
BUG(rsc): The rule Title uses for word boundaries does not handle Unicode punctuation properly.
func ToLower(s string) string
ToLower returns s with all Unicode letters mapped to their lower case.
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 using the case mapping specified by c.
func ToTitle(s string) string
ToTitle returns a copy of the string s with all Unicode letters mapped to
their Unicode title case.
func ToTitleSpecial(c unicode.SpecialCase, s string) string
ToTitleSpecial returns a copy of the string s with all Unicode letters mapped to their
Unicode title case, giving priority to the special casing rules.
func ToUpper(s string) string
ToUpper returns s with all Unicode letters mapped to their upper case.
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 using the case mapping specified by c.
func ToValidUTF8(s, replacement string) string
ToValidUTF8 returns a copy of the string s with each run of invalid UTF-8 byte sequences
replaced by the replacement string, which may be empty.
func Trim(s, cutset string) string
Trim returns a slice of the string s with all leading and
trailing Unicode code points contained in cutset removed.
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(s, cutset string) string
TrimLeft returns a slice of the string s with all leading
Unicode code points contained in cutset removed.
To remove a prefix, use TrimPrefix instead.
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(s, prefix string) string
TrimPrefix returns s without the provided leading prefix string.
If s doesn't start with prefix, s is returned unchanged.
func TrimRight(s, cutset string) string
TrimRight returns a slice of the string s, with all trailing
Unicode code points contained in cutset removed.
To remove a suffix, use TrimSuffix instead.
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(s string) string
TrimSpace returns a slice of the string s, with all leading
and trailing white space removed, as defined by Unicode.
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.
The pages are generated with Goldsv0.1.6. (GOOS=darwin GOARCH=amd64)
Golds is a Go 101 project and developed by Tapir Liu.
PR and bug reports are welcome and can be submitted to the issue list.
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