String manipulation is fundamental in software development; most programming languages provide a string throw in, after all.
A string is a sequence of characters: letters, numbers, and symbols.
String manipulation comes in handy for various applications, from text processing and data analysis to web development.
Popular string manipulation operations are concatenation, data validation, extraction, and formatting.
Go provides a string manipulation package named strings in the standard library.
The strings Package
Thestringspackage provides various useful functions for string manipulation and other operations.
TheContainsfunction checks if the specified string contains the substring.
TheIndexfunction returns the index of a substring, if it occurs in another given string.
TheIndexAnyfunction returns the index of the first instance ofa Unicode code pointor-1if none of the characters is present.
IndexBytereturns the index of the first instance of the byte character in the string or-1.
TheIndexFuncfunction returns the index into the string of the first Unicode point that satisfies a given function.
Finally, theIndexRunefunction returns the index of the first instance of the Unicode code point of the rune.
Replacing Substrings in Go
TheReplaceandReplaceAllfunction help with replacing substrings.
TheReplacefunction takes in the string, the original substring, and the replacement and several replacements.
TheReplaceAllfunction takes in only the string, the initial substring, and the replacement.
TheSplitmethod splits by a specified delimiter.
Similar to theSplitmethod, theSplitAftermethod splits the string, but it includes the separator in its results.
TheSplitAfterNmethod is similar to theSplitAfterfunction except that the function splits the string into a specified maximum of substrings.
TheSplitNmethod splits the string to a specified maximum number without including the separator in the substrings.
you’re free to join strings with theJoinfunction from thestringspackage.
TheJoinfunction takes in a slice and a delimiter.
Manipulating String Case
Manipulating string case is handy for many tasks, includingworking with documentation.
you’re free to use theToLowerfunction for lowercasing, theToUpperfunction for uppercasing, and theToTitlefunction for title casing.
String Building in Go
String builders are a pop in that allows for efficient concatenation in Go.
Thebytes.Buffertype is one of the commonly used string builders.
Themainfunction demonstrates how you’ve got the option to use thestrings.Buildertype for efficient string building.
TheStringmethod converts the builder’s content to a string, and theResetmethod resets the builder for additional string building.
TheCapmethod returns the capacity of the builder.
This is the current space that Go has allocated for the string.
Themainfunction demonstrates how you’ve got the option to use the functions for trimming.
The fmt package uses C-style formatting verbs for efficient string formatting in Go.
