Sweet.js macros for lambdas with currying, bound functions, and placeholders.
npm install -g sweet.js
npm install lambda-chop
sjs -m lambda-chop/macros myfile.js
Lambda-chop provides a macro λ which you can use to create terse, 'stabby'
lambdas, much like CoffeeScipt and ES6, but with some extra features:
->for unbound functions=>for bound functions usingFunction::bind- Tupled arguments
- Curried arguments
- Partials with placeholders
// Create unbound functions
var add = λ(x, y) -> x + y;
add(1, 2) === 3;
// Create bound functions
DB.getResource('foo', λ(err, resp) => {
...
});
// Curry functions by leaving off the tupled arguments
var always = λ x y -> x;
always(42)(12) === 42;
// Mix and match for multiple argument lists
var nonsense = λ(x, y)(s, t) f -> 42;
// Placeholders using square brackets and `#`
var str = λ[#.toString()];
var sub = λ[# - #];
sub(2, 1) === 1;Placeholder partials are never curried or bound, and are always expressions.
Yes! Not everyone likes it or wants to type it. Lambda-chop provides aliases by using a different module to compile your files.
# Use `fun` instead of `λ`
sjs -m lambda-chop/macros/fun myfile.js
# Use `lam` instead of `λ`
sjs -m lambda-chop/macros/lam myfile.js
Nathan Faubion (@natefaubion)
MIT