Crate gostd_strings 

Package strings implements simple functions to manipulate UTF-8 encoded strings.

zh-cn

strings 实现了操作UTF-8编码字符串的简单函数。

Structs

Builder

A Builder is used to efficiently build a string using Write methods. It minimizes memory copying. The zero value is ready to use. Do not copy a non-zero Builder.

Reader

A Reader implements the io.Reader, io.ReaderAt, io.ByteReader, io.ByteScanner, io.RuneReader, io.RuneScanner, io.Seeker, and io.WriterTo interfaces by reading from a string. The zero value for Reader operates like a Reader of an empty string.

Replacer

Replacer replaces a list of strings with replacements. It is safe for concurrent use by multiple goroutines.

Functions

Compare

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.

Contains

Contains reports whether substr is within s.

ContainsAny

ContainsAny reports whether any Unicode code points in chars are within s.

ContainsRune

ContainsRune reports whether the Unicode code point r is within s.

Count

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.

Cut

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.

EqualFold

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.

Fields

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.

FieldsFunc

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.

HasPrefix

HasPrefix tests whether the string s begins with prefix.

HasSuffix

HasSuffix tests whether the string s ends with suffix.

Index

Index returns the index of the first instance of substr in s, or -1 if substr is not present in s.

IndexAny

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.

IndexByte

IndexByte returns the index of the first instance of c in s, or -1 if c is not present in s.

IndexFunc

IndexFunc returns the index into s of the first Unicode code point satisfying f(c), or -1 if none do.

IndexRune

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.

Join

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.

LastIndex

LastIndex returns the index of the last instance of substr in s, or -1 if substr is not present in s.

LastIndexAny

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.

LastIndexByte

LastIndexByte returns the index of the last instance of c in s, or -1 if c is not present in s.

LastIndexFunc

LastIndexFunc returns the index into s of the last Unicode code point satisfying f(c), or -1 if none do.

Map

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.

Repeat

Repeat returns a new string consisting of count copies of the string s.

Replace

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. It panics if count is negative or if the result of (len!(s) * count) overflows.

ReplaceAll

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.

Split

Split slices s into all substrings separated by sep and returns a slice of the substrings between those separators.

SplitAfter

SplitAfter slices s into all substrings after each instance of sep and returns a slice of those substrings.

SplitAfterN

SplitAfterN slices s into substrings after each instance of sep and returns a slice of those substrings.

SplitN

SplitN slices s into substrings separated by sep and returns a slice of the substrings between those separators.

ToLower

ToLower returns s with all Unicode letters mapped to their lower case.

ToTitle

ToTitle returns a copy of the string s with all Unicode letters mapped to their Unicode title case.

ToUpper

ToUpper returns s with all Unicode letters mapped to their upper case.

Trim

Trim returns a slice of the string s with all leading and trailing Unicode code points contained in cutset removed.

TrimFunc

TrimFunc returns a slice of the string s with all leading and trailing Unicode code points c satisfying f(c) removed.

TrimLeft

TrimLeft returns a slice of the string s with all leading Unicode code points contained in cutset removed.

TrimLeftFunc

TrimLeftFunc returns a slice of the string s with all leading Unicode code points c satisfying f(c) removed.

TrimPrefix

TrimPrefix returns s without the provided leading prefix string. If s doesn’t start with prefix, s is returned unchanged.

TrimRight

TrimRight returns a slice of the string s, with all trailing Unicode code points contained in cutset removed.

TrimRightFunc

TrimRightFunc returns a slice of the string s with all trailing Unicode code points c satisfying f(c) removed.

TrimSpace

TrimSpace returns a slice of the string s, with all leading and trailing white space removed, as defined by Unicode.

TrimSuffix

TrimSuffix returns s without the provided trailing suffix string. If s doesn’t end with suffix, s is returned unchanged.