A case conversion library for Go.
The currently supported cases are:
| Function | Output |
|---|---|
cases.ToCamel(s) |
camelCase |
cases.ToPascal(s) |
PascalCase |
cases.ToSnake(s) |
snake_case |
cases.ToScreamingSnake(s) |
SCREAMING_SNAKE_CASE |
cases.ToKebab(s) |
kebab-case |
cases.ToScreamingKebab(s) |
SCREAMING-KEBAB-CASE |
cases.ToTrain(s) |
Train-Case |
cases.ToLower(s) |
lower case |
cases.ToTitle(s) |
Title Case |
cases.ToUpper(s) |
UPPER CASE |
cases.Transform(s, wordFn, delimFn) |
your own case here |
Word boundaries are defined as follows:
- A set of consecutive Unicode non-letter/number/symbol e.g.
foo _baris two words (fooandbar) - A transition from a lowercase letter to an uppercase letter e.g.
fooBaris two words (fooandBar) - The second last uppercase letter in a word with multiple uppercase letters
e.g.
FOOBaris two words (FOOandBar)
Install using
go get -u github.com/rossmacarthur/casesNow convert a string using the relevant function.
import "github.com/rossmacarthur/cases"
cases.ToSnake("XMLHttpRequest") // returns "xml_http_request"This library also exposes a Transform function which allows flexible
customization of the output.
For example if you wanted dotted.snake.case you could do the following.
import (
"strings"
"github.com/rossmacarthur/cases"
)
func delimDot(s *strings.Builder) {
s.WriteRune('.')
}
cases.Transform("XmlHttpRequest", cases.ToLower, delimDot) // returns xml.http.requestHere is a more involved example in order to handle acronyms in PascalCase.
import (
"strings"
"github.com/rossmacarthur/cases"
)
// The default ToPascal function has no understanding of acronyms
cases.ToPascal("xml_http_request") // returns "XmlHttpRequest"
// We can instead use Transform directly
writeFn := func(s *strings.Builder, word string) {
w := strings.ToUpper(asLower)
if w == "XML" || w == "HTTP" {
s.WriteString(w)
} else {
// fallback to default
cases.WriteTitle(s, word)
}
}
cases.Transform("xml_http_request", writeFn, nil) // returns "XMLHTTPRequest"This project is distributed under the terms of both the MIT license and the Apache License (Version 2.0).
See LICENSE-APACHE and LICENSE-MIT for details.
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