strings.Replace 1000
// 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 Replace(s string, old string, new string, n int) string
strings.ReplaceAll 843
// 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 ReplaceAll(s string, old string, new string) string
strings.NewReplacer 592
// 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 NewReplacer(oldnew ...string) *Replacer
strings.ToValidUTF8 85
// 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 ToValidUTF8(s string, replacement string) string
strings.TrimSpace 24
// TrimSpace returns a slice of the string s, with all leading
// and trailing white space removed, as defined by Unicode.
func TrimSpace(s string) string
strings.Repeat 21
// 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 Repeat(s string, count int) string
strings.Split 13
// 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.
//
// To split around the first instance of a separator, see Cut.
func Split(s string, sep string) []string
strings.SplitAfter 11
// 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 SplitAfter(s string, sep string) []string
strings.SplitN 10
// 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.
//
// To split around the first instance of a separator, see Cut.
func SplitN(s string, sep string, n int) []string
strings.Cut 8
// Cut slices s around the first instance of sep,
// returning the text before and after sep.
// The found result reports whether sep appears in s.
// If sep does not appear in s, cut returns s, "", false.
func Cut(s string, sep string) (before string, after string, found bool)
strings.Join 8
// 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 Join(elems []string, sep string) string
strings.SplitAfterN 7
// 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 SplitAfterN(s string, sep string, n int) []string
strings.LastIndex 6
// LastIndex returns the index of the last instance of substr in s, or -1 if substr is not present in s.
func LastIndex(s string, substr string) int
regexp.MatchReader 5
// MatchReader reports whether the text returned by the RuneReader
// contains any match of the regular expression pattern.
// More complicated queries need to use Compile and the full Regexp interface.
func MatchReader(pattern string, r io.RuneReader) (matched bool, err error)
strings.LastIndexAny 3
// 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 LastIndexAny(s string, chars string) int
strings.LastIndexByte 3
// LastIndexByte returns the index of the last instance of c in s, or -1 if c is not present in s.
func LastIndexByte(s string, c byte) int
strings.LastIndexFunc 3
// LastIndexFunc returns the index into s of the last
// Unicode code point satisfying f(c), or -1 if none do.
func LastIndexFunc(s string, f func(rune) bool) int
strings.CutPrefix 3
// CutPrefix returns s without the provided leading prefix string
// and reports whether it found the prefix.
// If s doesn't start with prefix, CutPrefix returns s, false.
// If prefix is the empty string, CutPrefix returns s, true.
func CutPrefix(s string, prefix string) (after string, found bool)
strings.HasPrefix 3
// HasPrefix tests whether the string s begins with prefix.
func HasPrefix(s string, prefix string) bool
regexp.CompilePOSIX 3
// CompilePOSIX is like Compile but restricts the regular expression
// to POSIX ERE (egrep) syntax and changes the match semantics to
// leftmost-longest.
//
// That is, when matching against text, the regexp returns a match that
// begins as early as possible in the input (leftmost), and among those
// it chooses a match that is as long as possible.
// This so-called leftmost-longest matching is the same semantics
// that early regular expression implementations used and that POSIX
// specifies.
//
// However, there can be multiple leftmost-longest matches, with different
// submatch choices, and here this package diverges from POSIX.
// Among the possible leftmost-longest matches, this package chooses
// the one that a backtracking search would have found first, while POSIX
// specifies that the match be chosen to maximize the length of the first
// subexpression, then the second, and so on from left to right.
// The POSIX rule is computationally prohibitive and not even well-defined.
// See https://swtch.com/~rsc/regexp/regexp2.html#posix for details.
func CompilePOSIX(expr string) (*Regexp, error)
regexp.MustCompilePOSIX 3
// MustCompilePOSIX is like CompilePOSIX but panics if the expression cannot be parsed.
// It simplifies safe initialization of global variables holding compiled regular
// expressions.
func MustCompilePOSIX(str string) *Regexp
strings.TrimPrefix 3
// TrimPrefix returns s without the provided leading prefix string.
// If s doesn't start with prefix, s is returned unchanged.
func TrimPrefix(s string, prefix string) string
regexp.Match 3
// Match reports whether the byte slice b
// contains any match of the regular expression pattern.
// More complicated queries need to use Compile and the full Regexp interface.
func Match(pattern string, b []byte) (matched bool, err error)
regexp.MatchString 3
// MatchString reports whether the string s
// contains any match of the regular expression pattern.
// More complicated queries need to use Compile and the full Regexp interface.
func MatchString(pattern string, s string) (matched bool, err error)
regexp.Compile 3
// Compile parses a regular expression and returns, if successful,
// a Regexp object that can be used to match against text.
//
// When matching against text, the regexp returns a match that
// begins as early as possible in the input (leftmost), and among those
// it chooses the one that a backtracking search would have found first.
// This so-called leftmost-first matching is the same semantics
// that Perl, Python, and other implementations use, although this
// package implements it without the expense of backtracking.
// For POSIX leftmost-longest matching, see CompilePOSIX.
func Compile(expr string) (*Regexp, error)
regexp.MustCompile 3
// MustCompile is like Compile but panics if the expression cannot be parsed.
// It simplifies safe initialization of global variables holding compiled regular
// expressions.
func MustCompile(str string) *Regexp
regexp.QuoteMeta 3
// QuoteMeta returns a string that escapes all regular expression metacharacters
// inside the argument text; the returned string is a regular expression matching
// the literal text.
func QuoteMeta(s string) string
strings.NewReader 2
// NewReader returns a new Reader reading from s.
// It is similar to bytes.NewBufferString but more efficient and read-only.
func NewReader(s string) *Reader
strings.Compare 1
// 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 Compare(a string, b string) int
strings.CutSuffix 1
// CutSuffix returns s without the provided ending suffix string
// and reports whether it found the suffix.
// If s doesn't end with suffix, CutSuffix returns s, false.
// If suffix is the empty string, CutSuffix returns s, true.
func CutSuffix(s string, suffix string) (before string, found bool)