charcode 1.2.0-nullsafety.3
charcode: ^1.2.0-nullsafety.3

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Constants for ASCII and common non-ASCII character codes.

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Character code constants #

This package defines symbolic names for some character codes (aka. code points).

They can used when working directly with characters as integers, to make the code more readable: if (firstChar == $A) ....

This is not an official Google package, and is not supported by Google.

Usage #

Import either one of the libraries:

import "package:charcode/ascii.dart";
import "package:charcode/html_entity.dart";

or import both libraries using the charcode.dart library:

import "package:charcode/charcode.dart";

Naming #

The character names are preceded by a $ to avoid conflicting with other variables, due to their short and common names (for example "$i").

Characters that are valid in a Dart identifier directly follow the $. Examples: $_, $a, $B and $3. Other characters are given symbolic names.

The names of letters are lower-case for lower-case letters ($sigma for σ), and mixed- or upper-case for upper-case letters ($Sigma for Σ). The names of symbols and punctuation are all lower-case, and omit suffixes like "sign", "symbol" and "mark". Examples: $plus, $exclamation, $tilde.

The ascii.dart library defines a symbolic name for each ASCII character. Some characters have more than one name. For example the common name $tab and the official abbreviation $ht for the horisontal tab.

The html_entity.dart library defines a constant for each HTML 4.01 character entity using their standard entity abbreviation, including case. Examples: $nbsp for &nbps;, $aring for the lower-case å and $Aring for the upper-case Å.

The HTML entities include all characters in the Latin-1 code page, greek letters and some mathematical symbols.

The charcode.dart library exports both ascii.dart and html_entity.dart. Where both libraries define the same name, the HTML entity name is preferred.

Rationale #

The Dart language doesn't have character literals. If that ever changes, this package will become irrelevant. Until then, this package can be used for the most common characters. See [http://dartbug.com/4415](request for character literals).

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Constants for ASCII and common non-ASCII character codes.

Documentation

API reference

Uploaders

lrn@google.com
kevmoo@google.com
nbosch@google.com

License

BSD (LICENSE)

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