coco

Coco

is a CoffeeScript dialect that aims to be more radical and practical.

Principles

• Respect JavaScript/ECMAScript semantics, but supply ways to amend them.
• Reserve less keywords.
• Die for DRY.
• Performance over readability.
• Readability over compressability.

Differences

• Additions
• Improvements
• Incompatibilities

Installation

Install node.js, then

git clone git:github.com/satyr/coco.git && cd coco && bin/coke i

Or install npm, then

npm install coco

Help

coco -h; coke

Changelog

0.2.2

• is not is the new isnt.
• @'++' is now valid as a shorhand for @['++'].
• Commas between primitive values are now optional. $ coco -bpe '[null true 1 "2"]' [null, true, 1, "2"];
• coke now automatically aliases tasks.
• extras/coco.js now works as a Gecko JS Module.
• Grouped documentation suite into doc/ for portability.
• Rewrote src/optparse.co.

0.2.1

• Added numeric ranges: $ bin/coco -bpe 'f -1 to 1, [2 to 8 by 3]' f(-1, 0, 1, [2, 5, 8]);
• Destructuring assignments can now specify default values using logical operators: $ coco -bpe '[@a || b] = c' this.a = c[0] || b; Default arguments syntax has been changed accordingly ((a || b) -> instead of (a ||= b) ->).
• do now performs special conversions against function literals with parameters, making it work as pseudo-let and Coffee 1.0.0 compliant: $ coco -bpe 'do (x = y, z) ->' (function(x, z){}(y, z));
• Allowed for i from x then as a sugar for for i from 0 til x then.
• Disallowed duplicate formal arguments.
• Improved syntax-highlight in src/index.html.

0.2.0

• Version bump for Xmas, in concert with Coffee 1.0.0.
• @@ is now a shorthand for arguments.
• do can now indicate a call against indented arguments, so that you can write f do x y instead of f( x y )
• and and or now close implicit calls, making you write even less parens: f x and g y or z -> f(x) && g(y) || z;
• catch's variable declaration is no longer required.
• a<[ b c ]> is now equivalent to a[\b, \c] (was a(\b, \c)).
• case now requires brackets to have multiple conditions.
• Added --nodejs option. See coffee#910.
• Renamed --stdio to --stdin.

0.1.6

• Added character/word literal: \C + \++ -> 'C' + '++';
• Retrieving multiple properties at once is now possible: a[b, c] -> [a[b], a[c]];
• Destructuring into an object's properties is now possible:
  • a[b, c] = d -> a[b] = d[0], a[c] = d[1];
  • a{b, c} = d -> a.b = d.b, a.c = d.c;
• Compound assignments can now destructure: [@a, @b] /= c -> this.a /= c[0], this.b /= c[1];

0.1.5

• Conditional control structures can now be anaphoric; that within if, while or case block now refers to the condition value.
• Decimal numbers can now have arbitrary trailing alphabets as comments. e.g. 9times, 1.5s
• Added <<</<<<< as aliases to import/import all
• non-ASCII identifiers are now allowed.

0.1.4

• . and its families can now be used with numbers and strings, instead of []. a.0.'0' compiles to a[0]['0'].
• Added syntax for cloning objects; obj{key:val} acts like a simple version of ES5 Object.create, creating a prototypal child of obj and assigning to .key with val.
• default arguments can now choose to use ||/&&.
• super under a class block now refers to the superclass.
• .coffee extension is no longer supported.

0.1.3

• Compilation now prefers single quotes.
• AST now compiles faster, roughly 1.4 times than 0.1.2.
• []/{} can now be safely used as an placeholder within array destructuring.
• Improved --nodes output.

0.1.2

• ... is now prefix.
• {0: first, (*-1): last} = array now works.
• Added --lex to the coco utility. Removed --lint.
• src/ now has doc view.

0.1.1

Release.