partial.lenses - npm Package Compare versions

Comparing version 0.5.0 to 0.5.1

lib/partial.lenses.js

@@ -79,8 +79,8 @@ "use strict";
 
-var L = function L() {
-  for (var _len = arguments.length, ls = Array(_len), _key = 0; _key < _len; _key++) {
-    ls[_key] = arguments[_key];
+var L = function L(l) {
+  for (var _len = arguments.length, ls = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+    ls[_key - 1] = arguments[_key];
   }
 
-  return ls.length === 1 ? lift(ls[0]) : _ramda2.default.compose.apply(_ramda2.default, _toConsumableArray(ls.map(lift)));
+  return ls.length === 0 ? lift(l) : _ramda2.default.compose.apply(_ramda2.default, [lift(l)].concat(_toConsumableArray(ls.map(lift))));
 };
@@ -103,30 +103,28 @@
 
-L.firstOf = function () {
-  for (var _len2 = arguments.length, ls = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
-    ls[_key2] = arguments[_key2];
+L.firstOf = function (l0) {
+  for (var _len2 = arguments.length, ls = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+    ls[_key2 - 1] = arguments[_key2];
   }
 
-  switch (ls.length) {
-    case 0:
-      throw new Error("firstOf called without arguments");
-    case 1:
-      return lift(ls[0]);
-    default:
-      var choose = function choose(target, otherwise) {
-        for (var i = 0, n = ls.length; i < n; ++i) {
-          var l = ls[i];
-          var r = _ramda2.default.view(lift(l), target);
-          if (undefined !== r) return otherwise ? l : r;
-        }
-        return otherwise;
-      };
+  l0 = lift(l0);
 
-      return function (toFunctor) {
-        return function (target) {
-          return _ramda2.default.map(function (focus) {
-            return _ramda2.default.set(lift(choose(target, ls[0])), focus, target);
-          }, toFunctor(choose(target)));
-        };
-      };
-  }
+  if (ls.length === 0) return l0;
+
+  return function (toFunctor) {
+    return function (target) {
+      var l = l0;
+      var r = _ramda2.default.view(l0, target);
+
+      for (var i = 0; undefined === r && i < ls.length; ++i) {
+        l = lift(ls[i]);
+        r = _ramda2.default.view(l, target);
+      }
+
+      if (undefined === r) l = l0;
+
+      return _ramda2.default.map(function (focus) {
+        return _ramda2.default.set(l, focus, target);
+      }, toFunctor(r));
+    };
+  };
 };
@@ -199,2 +197,2 @@
 exports.default = L;
-//# 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R from \"ramda\"\n\n//\n\nconst deleteKey = (k, o) => {\n  if (o === undefined || !(k in o))\n    return o\n  let r\n  for (const p in o) {\n    if (p !== k) {\n      if (undefined === r)\n        r = {}\n      r[p] = o[p]\n    }\n  }\n  return r\n}\n\nconst setKey = (k, v, o) => {\n  if (o === undefined)\n    return {[k]: v}\n  if (k in o && R.equals(v, o[k]))\n    return o\n  const r = {[k]: v}\n  for (const p in o)\n    if (p !== k)\n      r[p] = o[p]\n  return r\n}\n\n//\n\nconst dropped = xs => Object.keys(xs).length === 0 ? undefined : xs\n\n//\n\nconst toPartial = transform => x => undefined === x ? x : transform(x)\n\n//\n\nconst conserve = f => (n0, o) => {\n  const n = f(n0, o)\n  return R.equals(n, o) ? o : n\n}\n\n//\n\nexport const lift = l => {\n  switch (typeof l) {\n  case \"string\": return L.prop(l)\n  case \"number\": return L.index(l)\n  default:       return l\n  }\n}\n\nconst L = (...ls) => ls.length === 1 ? lift(ls[0]) : R.compose(...ls.map(lift))\n\nL.compose = L\nL.delete = R.curry((l, s) => R.set(lift(l), undefined, s))\nL.lens = R.lens\nL.over = R.curry((l, x2x, s) => R.over(lift(l), x2x, s))\nL.set = R.curry((l, x, s) => R.set(lift(l), x, s))\nL.view = R.curry((l, s) => R.view(lift(l), s))\n\nL.firstOf = (...ls) => {\n  switch (ls.length) {\n  case 0:\n    throw new Error(\"firstOf called without arguments\")\n  case 1:\n    return lift(ls[0])\n  default:\n    const choose = (target, otherwise) => {\n      for (let i=0, n=ls.length; i<n; ++i) {\n        const l = ls[i]\n        const r = R.view(lift(l), target)\n        if (undefined !== r)\n          return otherwise ? l : r\n      }\n      return otherwise\n    }\n\n    return toFunctor => target =>\n      R.map(focus => R.set(lift(choose(target, ls[0])), focus, target),\n            toFunctor(choose(target)))\n  }\n}\n\nL.replace = R.curry((inn, out) =>\n  R.lens(x => R.equals(x, inn) ? out : x,\n         conserve(y => R.equals(y, out) ? inn : y)))\n\nL.default = L.replace(undefined)\nL.required = inn => L.replace(inn, undefined)\nL.define = v => R.compose(L.required(v), L.default(v))\n\nL.normalize = transform =>\n  R.lens(toPartial(transform), conserve(toPartial(transform)))\n\nL.prop = k =>\n  R.lens(o => o && o[k],\n         (v, o) => v === undefined ? deleteKey(k, o) : setKey(k, v, o))\n\nL.find = predicate => R.lens(xs => xs && xs.find(predicate), (x, xs) => {\n  if (x === undefined) {\n    if (xs === undefined)\n      return undefined\n    const i = xs.findIndex(predicate)\n    if (i < 0)\n      return xs\n    return dropped(xs.slice(0, i).concat(xs.slice(i+1)))\n  } else {\n    if (xs === undefined)\n      return [x]\n    const i = xs.findIndex(predicate)\n    if (i < 0)\n      return xs.concat([x])\n    if (R.equals(x, xs[i]))\n      return xs\n    return xs.slice(0, i).concat([x], xs.slice(i+1))\n  }\n})\n\nL.index = i => R.lens(xs => xs && xs[i], (x, xs) => {\n  if (x === undefined) {\n    if (xs === undefined)\n      return undefined\n    if (i < xs.length)\n      return dropped(xs.slice(0, i).concat(xs.slice(i+1)))\n    return xs\n  } else {\n    if (xs === undefined)\n      return Array(i).concat([x])\n    if (xs.length <= i)\n      return xs.concat(Array(i - xs.length), [x])\n    if (R.equals(x, xs[i]))\n      return xs\n    return xs.slice(0, i).concat([x], xs.slice(i+1))\n  }\n})\n\nexport default L\n"]}
+//# 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rtial.lenses.js","sourcesContent":["import R from \"ramda\"\n\n//\n\nconst deleteKey = (k, o) => {\n  if (o === undefined || !(k in o))\n    return o\n  let r\n  for (const p in o) {\n    if (p !== k) {\n      if (undefined === r)\n        r = {}\n      r[p] = o[p]\n    }\n  }\n  return r\n}\n\nconst setKey = (k, v, o) => {\n  if (o === undefined)\n    return {[k]: v}\n  if (k in o && R.equals(v, o[k]))\n    return o\n  const r = {[k]: v}\n  for (const p in o)\n    if (p !== k)\n      r[p] = o[p]\n  return r\n}\n\n//\n\nconst dropped = xs => Object.keys(xs).length === 0 ? undefined : xs\n\n//\n\nconst toPartial = transform => x => undefined === x ? x : transform(x)\n\n//\n\nconst conserve = f => (n0, o) => {\n  const n = f(n0, o)\n  return R.equals(n, o) ? o : n\n}\n\n//\n\nexport const lift = l => {\n  switch (typeof l) {\n  case \"string\": return L.prop(l)\n  case \"number\": return L.index(l)\n  default:       return l\n  }\n}\n\nconst L = (l, ...ls) =>\n  ls.length === 0 ? lift(l) : R.compose(lift(l), ...ls.map(lift))\n\nL.compose = L\nL.delete = R.curry((l, s) => R.set(lift(l), undefined, s))\nL.lens = R.lens\nL.over = R.curry((l, x2x, s) => R.over(lift(l), x2x, s))\nL.set = R.curry((l, x, s) => R.set(lift(l), x, s))\nL.view = R.curry((l, s) => R.view(lift(l), s))\n\nL.firstOf = (l0, ...ls) => {\n  l0 = lift(l0)\n\n  if (ls.length === 0)\n    return l0\n\n  return toFunctor => target => {\n    let l = l0\n    let r = R.view(l0, target)\n\n    for (let i=0; undefined === r && i<ls.length; ++i) {\n      l = lift(ls[i])\n      r = R.view(l, target)\n    }\n\n    if (undefined === r)\n      l = l0\n\n    return R.map(focus => R.set(l, focus, target), toFunctor(r))\n  }\n}\n\nL.replace = R.curry((inn, out) =>\n  R.lens(x => R.equals(x, inn) ? out : x,\n         conserve(y => R.equals(y, out) ? inn : y)))\n\nL.default = L.replace(undefined)\nL.required = inn => L.replace(inn, undefined)\nL.define = v => R.compose(L.required(v), L.default(v))\n\nL.normalize = transform =>\n  R.lens(toPartial(transform), conserve(toPartial(transform)))\n\nL.prop = k =>\n  R.lens(o => o && o[k],\n         (v, o) => v === undefined ? deleteKey(k, o) : setKey(k, v, o))\n\nL.find = predicate => R.lens(xs => xs && xs.find(predicate), (x, xs) => {\n  if (x === undefined) {\n    if (xs === undefined)\n      return undefined\n    const i = xs.findIndex(predicate)\n    if (i < 0)\n      return xs\n    return dropped(xs.slice(0, i).concat(xs.slice(i+1)))\n  } else {\n    if (xs === undefined)\n      return [x]\n    const i = xs.findIndex(predicate)\n    if (i < 0)\n      return xs.concat([x])\n    if (R.equals(x, xs[i]))\n      return xs\n    return xs.slice(0, i).concat([x], xs.slice(i+1))\n  }\n})\n\nL.index = i => R.lens(xs => xs && xs[i], (x, xs) => {\n  if (x === undefined) {\n    if (xs === undefined)\n      return undefined\n    if (i < xs.length)\n      return dropped(xs.slice(0, i).concat(xs.slice(i+1)))\n    return xs\n  } else {\n    if (xs === undefined)\n      return Array(i).concat([x])\n    if (xs.length <= i)\n      return xs.concat(Array(i - xs.length), [x])\n    if (R.equals(x, xs[i]))\n      return xs\n    return xs.slice(0, i).concat([x], xs.slice(i+1))\n  }\n})\n\nexport default L\n"]}

package.json

 {
   "name": "partial.lenses",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Ramda compatible lenses",
@@ -5,0 +5,0 @@ "main": "lib/partial.lenses.js",

README.md

@@ -116,4 +116,4 @@ [ [Examples](#examples) | [Reference](#reference) | [Background](#background) ]
 
-* `L(l1, ..., ln)` and `L.compose(l1, ..., ln)` both are the same as
-  `R.compose(lift(l1), ..., lift(lN))` (see
+* `L(l0, ...ls)` and `L.compose(l0, ...ls)` both are the same as
+  `R.compose(lift(l0), ...ls.map(lift))` (see
   [compose](http://ramdajs.com/0.19.0/docs/#compose)).
@@ -129,3 +129,3 @@ * `L.lens(get, set)` is the same as `R.lens(get, set)` (see
 
-The `lift` operation is defined as
+The idempotent `lift` operation is defined as
 
@@ -150,8 +150,8 @@ ```js
 
-#### L.firstOf(l1, ..., lN)
+#### L.firstOf(l0, ...ls)
 
-`L.firstOf(l1, ..., lN)` returns a partial lens that acts like the first of the
-given lenses whose view is not undefined on the given target.  When the views of
-all of the given lenses are undefined, the returned lens acts like the first of
-the given lenses.
+`L.firstOf(l0, ...ls)` returns a partial lens that acts like the first of the
+given lenses, `l0, ...ls`, whose view is not undefined on the given target.
+When the views of all of the given lenses are undefined, the returned lens acts
+like `l0`.
 
@@ -250,8 +250,8 @@ Note that `L.firstOf` is an associative operation, but there is no identity
 
-One might assume that `R.lensPath([p1, ..., pN])` is equivalent to
-`R.compose(R.lensProp(p1), ..., R.lensProp(pN))`, but that is not the case.
+One might assume that `R.lensPath([p0, ...ps])` is equivalent to
+`R.compose(R.lensProp(p0), ...ps.map(R.lensProp))`, but that is not the case.
 
 With partial lenses you can robustly compose a path lens from prop lenses
-`R.compose(L.prop(p1), ..., L.prop(pN))` or just use the shorthand notation
-`L(p1, ..., pN)`.
+`R.compose(L.prop(p0), ...ps.map(L.prop))` or just use the shorthand notation
+`L(p0, ...ps)`.
 
@@ -258,0 +258,0 @@ ### Types

src/partial.lenses.js

@@ -56,3 +56,4 @@ import R from "ramda"
 
-const L = (...ls) => ls.length === 1 ? lift(ls[0]) : R.compose(...ls.map(lift))
+const L = (l, ...ls) =>
+  ls.length === 0 ? lift(l) : R.compose(lift(l), ...ls.map(lift))
 
@@ -66,22 +67,21 @@ L.compose = L
 
-L.firstOf = (...ls) => {
-  switch (ls.length) {
-  case 0:
-    throw new Error("firstOf called without arguments")
-  case 1:
-    return lift(ls[0])
-  default:
-    const choose = (target, otherwise) => {
-      for (let i=0, n=ls.length; i<n; ++i) {
-        const l = ls[i]
-        const r = R.view(lift(l), target)
-        if (undefined !== r)
-          return otherwise ? l : r
-      }
-      return otherwise
+L.firstOf = (l0, ...ls) => {
+  l0 = lift(l0)
+
+  if (ls.length === 0)
+    return l0
+
+  return toFunctor => target => {
+    let l = l0
+    let r = R.view(l0, target)
+
+    for (let i=0; undefined === r && i<ls.length; ++i) {
+      l = lift(ls[i])
+      r = R.view(l, target)
     }
 
-    return toFunctor => target =>
-      R.map(focus => R.set(lift(choose(target, ls[0])), focus, target),
-            toFunctor(choose(target)))
+    if (undefined === r)
+      l = l0
+
+    return R.map(focus => R.set(l, focus, target), toFunctor(r))
   }
@@ -88,0 +88,0 @@ }

test/tests.js

@@ -21,2 +21,35 @@ import R from "ramda"
 
+describe("arities", () => {
+  testEq('L.compose.length', () =>
+          L.compose.length, 1)
+  testEq('L.default.length', () =>
+          L.default.length, 1)
+  testEq('L.define.length', () =>
+          L.define.length, 1)
+  testEq('L.delete.length', () =>
+          L.delete.length, 2)
+  testEq('L.find.length', () =>
+          L.find.length, 1)
+  testEq('L.index.length', () =>
+          L.index.length, 1)
+  testEq('L.length', () =>
+          L.length, 1)
+  testEq('L.lens.length', () =>
+          L.lens.length, 2)
+  testEq('L.normalize.length', () =>
+          L.normalize.length, 1)
+  testEq('L.over.length', () =>
+          L.over.length, 3)
+  testEq('L.prop.length', () =>
+          L.prop.length, 1)
+  testEq('L.replace.length', () =>
+          L.replace.length, 2)
+  testEq('L.required.length', () =>
+          L.required.length, 1)
+  testEq('L.set.length', () =>
+          L.set.length, 3)
+  testEq('L.view.length', () =>
+          L.view.length, 2)
+})
+
 describe('L.find', () => {
@@ -23,0 +56,0 @@ testEq('L.set(L.find(R.equals(2)), undefined, [,,2])', () =>

No alert changes

Improved metrics

Total package byte prevSize

46062

increased by0.65%

Lines of code

442

increased by5.24%

No dependency changes