fp-ts
Version:
Functional programming in TypeScript
60 lines (59 loc) • 2.54 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.filter = filter;
exports.filterMap = filterMap;
exports.partition = partition;
exports.partitionMap = partitionMap;
exports.getFilterableComposition = getFilterableComposition;
/**
* `Filterable` represents data structures which can be _partitioned_/_filtered_.
*
* Adapted from https://github.com/LiamGoodacre/purescript-filterable/blob/master/src/Data/Filterable.purs
*
* @since 2.0.0
*/
var Compactable_1 = require("./Compactable");
var function_1 = require("./function");
var Functor_1 = require("./Functor");
var Option_1 = require("./Option");
var Predicate_1 = require("./Predicate");
var Separated_1 = require("./Separated");
function filter(F, G) {
return function (predicate) { return function (fga) { return F.map(fga, function (ga) { return G.filter(ga, predicate); }); }; };
}
function filterMap(F, G) {
return function (f) { return function (fga) { return F.map(fga, function (ga) { return G.filterMap(ga, f); }); }; };
}
function partition(F, G) {
var _filter = filter(F, G);
return function (predicate) {
var left = _filter((0, Predicate_1.not)(predicate));
var right = _filter(predicate);
return function (fgb) { return (0, Separated_1.separated)(left(fgb), right(fgb)); };
};
}
function partitionMap(F, G) {
var _filterMap = filterMap(F, G);
return function (f) { return function (fga) {
return (0, Separated_1.separated)((0, function_1.pipe)(fga, _filterMap(function (a) { return (0, Option_1.getLeft)(f(a)); })), (0, function_1.pipe)(fga, _filterMap(function (a) { return (0, Option_1.getRight)(f(a)); })));
}; };
}
/** @deprecated */
function getFilterableComposition(F, G) {
var map = (0, Functor_1.getFunctorComposition)(F, G).map;
var _compact = (0, Compactable_1.compact)(F, G);
var _separate = (0, Compactable_1.separate)(F, G, G);
var _filter = filter(F, G);
var _filterMap = filterMap(F, G);
var _partition = partition(F, G);
var _partitionMap = partitionMap(F, G);
return {
map: map,
compact: _compact,
separate: _separate,
filter: function (fga, f) { return (0, function_1.pipe)(fga, _filter(f)); },
filterMap: function (fga, f) { return (0, function_1.pipe)(fga, _filterMap(f)); },
partition: function (fga, p) { return (0, function_1.pipe)(fga, _partition(p)); },
partitionMap: function (fga, f) { return (0, function_1.pipe)(fga, _partitionMap(f)); }
};
}