Changes: v0.10.0...v0.11.0

Removals:

• ❌ debug extension remove extensions #857
• ❌ impure extension remove extensions #857
• ❌ lazylist extension remove extensions #857
• ❌ R.op support R.__ placeholder in curry functions #819
• ❌ R.pathOn change path functions to operate on lists of strings #876

Deprecations (to be removed in v0.12.0):

• 💾 R.appendTo deprecate R.appendTo and R.prependTo #868
• 💾 R.installTo deprecate R.installTo #870
• 💾 R.prependTo deprecate R.appendTo and R.prependTo #868
• 💾 R.propOf deprecate R.propOf #869
• 💾 👽 R.I deprecate R.I #880
• 💾 👽 R.get deprecate R.get #871

Changes:

• all Ramda's fixed-arity functions are now curried invariants for partial application #836
• all Ramda's fixed-arity functions now respect the R.__ placeholder in any position(s) support R.__ placeholder in curry functions #819 invariants for partial application #836
• applying a curried function to no arguments no longer throws remove special case for curried function applied to zero arguments #856
• R.always() is no longer equivalent to R.always(undefined) invariants for partial application #836
• ⚠️ R.assocPath now operates on a list of strings change path functions to operate on lists of strings #876
• R.bind now preserves arity preserve arity in R.bind #827
• R.curry and R.curryN now return a function which respects the R.__ placeholder support R.__ placeholder in curry functions #819
• R.identity() is no longer equivalent to R.identity(undefined) invariants for partial application #836
• ⚠️ R.path now operates on a list of strings change path functions to operate on lists of strings #876
• ⚠️ R.pathEq now operates on a list of strings change path functions to operate on lists of strings #876
• R.slice now supports array-like objects support array-like objects in R.slice #840

Additions:

• 🆕 R.dissocPath Implement dissocPath #864 change path functions to operate on lists of strings #876
• 🆕 R.lensOn lensOn for a particular object #855

R.__ placeholder

Prior to v0.11.0 certain functions respected the R.__ placeholder. For example:

var isPositive = R.gt(R.__, 0);

isPositive(0);  // => false
isPositive(1);  // => true

All Ramda's fixed-arity functions now respect the R.__ placeholder in any position(s). For example:

var greet = R.replace('{name}', R.__, 'Welcome, {name}. Enjoy your stay.');

greet('Alice');  //=> 'Welcome, Alice. Enjoy your stay.'

Given:

var f = function(a, b, c) { return [a, b, c]; };
var g = R.curry(f);
var _ = R.__;

the following are equivalent:

g(_, 2, 3)(1)
g(1, _, 3)(2)
g(1, 2, _)(3)

g(1, _, _)(2)(3)
g(_, 2, _)(1)(3)
g(_, _, 3)(1)(2)

g(1, _, _)(2, 3)
g(_, 2, _)(1, 3)
g(_, _, 3)(1, 2)

g(1, _, _)(_, 3)(2)
g(_, 2, _)(_, 3)(1)
g(_, _, 3)(_, 2)(1)

g(_, _, _)(_, _)(_)(1, 2, 3)
g(_, _, _)(1, _, _)(_, _)(2, _)(_)(3)

Functions returned by R.curry and R.curryN also respect R.__.

Invariants

Thanks to #819, #836, and #856, the following invariants now hold throughout the library:

1. For every curried function f where f.length > 0, applying f to no arguments gives a function equivalent to f.
2. For every curried function f where f.length > 0, applying f to R.__ gives a function equivalent to f.
3. For every curried function f where f.length > 1, applying f to any value other than R.__ gives a function g with length f.length - 1. All three invariants hold for g and all "descendants" of g.

The invariants also hold for functions returned by R.curry and R.curryN.