Crystal String Inflection

Yet another Crystal library for string inflection.

Installation

Add this to your application's shard.yml:

dependencies:
  string_inflection:
    github: mosop/string_inflection

Usage

require "string_inflection"

StringInflection.camel("foo bar")  # => "fooBar"
StringInflection.pascal("foo bar") # => "FooBar"
StringInflection.snake("foo bar")  # => "foo_bar"
StringInflection.kebab("foo bar")  # => "foo-bar"
StringInflection.plural("child")   # => "children"
StringInflection.singular("data")  # => "datum"

Or do you like shorthand? So you can use the Case module.

require "string_inflection/case"

Case.camel("foo bar")  # => "fooBar"
Case.pascal("foo bar") # => "FooBar"
Case.snake("foo bar")  # => "foo_bar"
Case.kebab("foo bar")  # => "foo-bar"
Case.plural("child")   # => "children"
Case.singular("data")  # => "datum"

Upper Case Replacement

With the :up option, singular / plural replaces a string with upper case letters.

StringInflection.plural("CHILD", up: true) # => "CHILDREN"
StringInflection.singular("DATA", up: true)  # => "DATUM"

Note: :up affects only a replaced substring.

StringInflection.plural("child", up: true) # => "childREN"
StringInflection.singular("data", up: true)  # => "datUM"

String#to

The special extension String#to makes things object-oriented.

require "string_inflection/string/to"

Then you can:

"foo bar".to.camel # => "fooBar"
"foo bar".to.pascal # => "FooBar"
"foo bar".to.snake  # => "foo_bar"
"foo bar".to.kebab  # => "foo-bar"
"child".to.plural   # => "children"
"data".to.singular  # => "datum"

Naming Methods

[WIP]

You can define inflection methods with your own names under your own namespaces.

Special Thanks

Automatically Generated Inflection Database (AGID)

The handy database by Kevin Atkinson and other authors is significantly useful to generate irregular singular/plural forms. You can see the license in README.

Releases

v0.2.0
- (Breaking Change) StringInflection.define_inflector is separated into StringInflection.define_inflector and StringInflection.define_inflector_methods.
v0.1.7
- Upper Case Replacement
v0.1.3
- StringInflection.singular
v0.1.2
- StringInflection.plural
v0.1.1
- Case
- String#to
- StringInflection.define_inflector