Simple functions to change the case of a string

change_case.coffee

toSpaceCase = (str) ->
  str.replace(/[\W_]+(.|$)/g, (x, y) -> " #{y ? ''}").trim()
     .replace(/([a-z])([A-Z])/g, '$1 $2')
     .replace(/\b([A-Z]+)([A-Z])([a-z])/, '$1 $2$3')
     .toLowerCase()

toSnakeCase = (str) ->
  toSpaceCase(str).replace(/\s/g, '_')

toCamelCase = (str) ->
  toSpaceCase(str).replace(/\s(\w)/g, (x, y) -> y.toUpperCase())

toPascalCase = (str) ->
  toSpaceCase(str).replace(/(?:^|\s)(\w)/g, (x, y) -> y.toUpperCase())

toDashCase = (str) ->
  toSpaceCase(str).replace(/\s/g, '-')

toDotCase = (str) ->
  toSpaceCase(str).replace(/\s/g, '.')