Character & Text¶

Character¶

Module: Character — character classification and string-to-character access.

All classification functions take a single Character and return Boolean.

Classification¶

Verb	Signature	Description
`validates`	`alpha(c Character)`	True if alphabetic (a–z, A–Z)
`validates`	`digit(c Character)`	True if numeric digit (0–9)
`validates`	`alnum(c Character)`	True if alphanumeric
`validates`	`upper(c Character)`	True if uppercase letter
`validates`	`lower(c Character)`	True if lowercase letter
`validates`	`space(c Character)`	True if whitespace

Access¶

Verb	Signature	Description
`reads`	`at(string String, index Integer) Character`	Character at index (0-based, bounds-checked)

  Character validates alpha digit space reads at

validates is_identifier_start(c Character)
from
    Character.alpha(c)

Text¶

Module: Text — string operations and construction.

Defines a binary StringBuilder type for efficient incremental string building.

Query¶

Verb	Signature	Description
`reads`	`length(s String) Integer`	Number of bytes in string
`reads`	`index(text String, substring String) Option<Integer>`	Find position of substring

Validation¶

Verb	Signature	Description
`validates`	`starts(s String, prefix String)`	True if string begins with prefix
`validates`	`ends(s String, suffix String)`	True if string ends with suffix
`validates`	`contains(s String, sub String)`	True if substring is present

Transform¶

Verb	Signature	Description
`transforms`	`slice(text String, start Integer, end Integer) String`	Extract substring [start, end)
`transforms`	`split(text String, separator String) List<String>`	Split by delimiter
`transforms`	`join(parts List<String>, separator String) String`	Join strings with separator
`transforms`	`trim(text String) String`	Remove leading and trailing whitespace
`transforms`	`lower(text String) String`	Convert to lowercase
`transforms`	`upper(text String) String`	Convert to uppercase
`transforms`	`replace(text String, old String, new String) String`	Replace all occurrences
`transforms`	`repeat(text String, count Integer) String`	Repeat string count times

Builder¶

The StringBuilder type allows efficient incremental string construction.

Verb	Signature	Description
`creates`	`builder() StringBuilder:[Mutable]`	Create an empty builder
`transforms`	`string(builder StringBuilder:[Mutable], text String) StringBuilder:[Mutable]`	Append a string
`transforms`	`char(builder StringBuilder:[Mutable], character Character) StringBuilder:[Mutable]`	Append a character
`reads`	`build(builder StringBuilder:[Mutable]) String`	Finalize to string
`reads`	`length(builder StringBuilder:[Mutable]) Integer`	Current builder length

  Text reads length index validates contains starts transforms split join trim replace
  Text creates builder transforms string reads build

reads word_count(text String) Integer
from
    parts as List<String> = Text.split(Text.trim(text), " ")
    Text.length(parts)