init component
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Robin COuret
322
node_modules/fp-ts/es6/State.js
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322
node_modules/fp-ts/es6/State.js
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import { apFirst as apFirst_, apS as apS_, apSecond as apSecond_ } from './Apply';
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import * as chainable from './Chain';
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import { dual, identity, pipe } from './function';
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import { bindTo as bindTo_, flap as flap_, let as let__ } from './Functor';
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import * as _ from './internal';
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// -------------------------------------------------------------------------------------
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// constructors
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// -------------------------------------------------------------------------------------
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/**
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* Get the current state
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*
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* @category constructors
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* @since 2.0.0
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*/
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export var get = function () { return function (s) { return [s, s]; }; };
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/**
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* Set the state
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*
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* @category constructors
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* @since 2.0.0
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*/
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export var put = function (s) { return function () { return [undefined, s]; }; };
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/**
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* Modify the state by applying a function to the current state
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*
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* @category constructors
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* @since 2.0.0
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*/
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export var modify = function (f) { return function (s) { return [undefined, f(s)]; }; };
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/**
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* Get a value which depends on the current state
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*
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* @category constructors
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* @since 2.0.0
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*/
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export var gets = function (f) { return function (s) { return [f(s), s]; }; };
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/* istanbul ignore next */
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var _map = function (fa, f) { return pipe(fa, map(f)); };
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/* istanbul ignore next */
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var _ap = function (fab, fa) { return pipe(fab, ap(fa)); };
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/**
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* `map` can be used to turn functions `(a: A) => B` into functions `(fa: F<A>) => F<B>` whose argument and return types
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* use the type constructor `F` to represent some computational context.
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*
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* @category mapping
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* @since 2.0.0
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*/
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export var map = function (f) { return function (fa) { return function (s1) {
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var _a = fa(s1), a = _a[0], s2 = _a[1];
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return [f(a), s2];
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}; }; };
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/**
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* @since 2.0.0
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*/
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export var ap = function (fa) { return function (fab) { return function (s1) {
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var _a = fab(s1), f = _a[0], s2 = _a[1];
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var _b = fa(s2), a = _b[0], s3 = _b[1];
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return [f(a), s3];
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}; }; };
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/**
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* @category constructors
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* @since 2.0.0
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*/
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export var of = function (a) { return function (s) { return [a, s]; }; };
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/**
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* @category sequencing
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* @since 2.14.0
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*/
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export var flatMap = /*#__PURE__*/ dual(2, function (ma, f) {
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return function (s1) {
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var _a = ma(s1), a = _a[0], s2 = _a[1];
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return f(a)(s2);
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};
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});
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/**
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* @category sequencing
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* @since 2.0.0
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*/
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export var flatten = /*#__PURE__*/ flatMap(identity);
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/**
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* @category type lambdas
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* @since 2.0.0
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*/
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export var URI = 'State';
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/**
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* @category instances
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* @since 2.7.0
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*/
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export var Functor = {
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URI: URI,
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map: _map
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};
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/**
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* @category mapping
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* @since 2.10.0
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*/
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export var flap = /*#__PURE__*/ flap_(Functor);
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/**
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* @category instances
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* @since 2.10.0
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*/
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export var Pointed = {
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URI: URI,
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of: of
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};
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/**
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* @category instances
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* @since 2.10.0
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*/
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export var Apply = {
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URI: URI,
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map: _map,
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ap: _ap
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};
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/**
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* Combine two effectful actions, keeping only the result of the first.
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*
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* @since 2.0.0
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*/
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export var apFirst = /*#__PURE__*/ apFirst_(Apply);
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/**
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* Combine two effectful actions, keeping only the result of the second.
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*
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* @since 2.0.0
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*/
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export var apSecond = /*#__PURE__*/ apSecond_(Apply);
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/**
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* @category instances
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* @since 2.7.0
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*/
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export var Applicative = {
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URI: URI,
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map: _map,
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ap: _ap,
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of: of
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};
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/**
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* @category instances
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* @since 2.10.0
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*/
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export var Chain = {
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URI: URI,
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map: _map,
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ap: _ap,
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chain: flatMap
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};
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/**
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* @category instances
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* @since 2.7.0
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*/
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export var Monad = {
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URI: URI,
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map: _map,
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ap: _ap,
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of: of,
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chain: flatMap
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};
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/**
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* Composes computations in sequence, using the return value of one computation to determine the next computation and
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* keeping only the result of the first.
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*
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* @category combinators
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* @since 2.15.0
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*/
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export var tap = /*#__PURE__*/ dual(2, chainable.tap(Chain));
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/**
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* @category instances
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* @since 2.11.0
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*/
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export var FromState = {
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URI: URI,
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fromState: identity
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};
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// -------------------------------------------------------------------------------------
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// utils
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// -------------------------------------------------------------------------------------
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/**
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* Run a computation in the `State` monad, discarding the final state
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*
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* @since 2.8.0
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*/
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export var evaluate = function (s) {
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return function (ma) {
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return ma(s)[0];
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};
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};
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/**
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* Run a computation in the `State` monad discarding the result
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*
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* @since 2.8.0
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*/
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export var execute = function (s) {
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return function (ma) {
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return ma(s)[1];
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};
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};
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// -------------------------------------------------------------------------------------
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// do notation
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// -------------------------------------------------------------------------------------
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/**
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* @since 2.8.0
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*/
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export var bindTo = /*#__PURE__*/ bindTo_(Functor);
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var let_ = /*#__PURE__*/ let__(Functor);
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export {
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/**
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* @since 2.13.0
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*/
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let_ as let };
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/**
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* @since 2.8.0
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*/
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export var bind = /*#__PURE__*/ chainable.bind(Chain);
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// -------------------------------------------------------------------------------------
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// pipeable sequence S
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// -------------------------------------------------------------------------------------
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/**
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* @since 2.8.0
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*/
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export var apS = /*#__PURE__*/ apS_(Apply);
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// -------------------------------------------------------------------------------------
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// array utils
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// -------------------------------------------------------------------------------------
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/**
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* Equivalent to `ReadonlyNonEmptyArray#traverseWithIndex(Applicative)`.
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*
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* @category traversing
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* @since 2.11.0
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*/
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export var traverseReadonlyNonEmptyArrayWithIndex = function (f) {
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return function (as) {
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return function (s) {
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var _a = f(0, _.head(as))(s), b = _a[0], s2 = _a[1];
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var bs = [b];
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var out = s2;
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for (var i = 1; i < as.length; i++) {
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var _b = f(i, as[i])(out), b_1 = _b[0], s2_1 = _b[1];
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bs.push(b_1);
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out = s2_1;
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}
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return [bs, out];
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};
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};
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};
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/**
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* Equivalent to `ReadonlyArray#traverseWithIndex(Applicative)`.
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*
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* @category traversing
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* @since 2.11.0
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*/
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export var traverseReadonlyArrayWithIndex = function (f) {
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var g = traverseReadonlyNonEmptyArrayWithIndex(f);
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return function (as) { return (_.isNonEmpty(as) ? g(as) : of(_.emptyReadonlyArray)); };
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};
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/**
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* Equivalent to `ReadonlyArray#traverseWithIndex(Applicative)`.
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*
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* @category traversing
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* @since 2.9.0
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*/
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export var traverseArrayWithIndex = traverseReadonlyArrayWithIndex;
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/**
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* Equivalent to `ReadonlyArray#traverse(Applicative)`.
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*
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* @category traversing
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* @since 2.9.0
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*/
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export var traverseArray = function (f) { return traverseReadonlyArrayWithIndex(function (_, a) { return f(a); }); };
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/**
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* Equivalent to `ReadonlyArray#sequence(Applicative)`.
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*
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* @category traversing
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* @since 2.9.0
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*/
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export var sequenceArray =
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/*#__PURE__*/ traverseArray(identity);
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// -------------------------------------------------------------------------------------
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// legacy
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// -------------------------------------------------------------------------------------
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/**
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* Alias of `flatMap`.
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*
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* @category legacy
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* @since 2.0.0
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*/
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export var chain = flatMap;
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/**
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* Alias of `tap`.
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*
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* @category legacy
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* @since 2.0.0
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*/
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export var chainFirst = tap;
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// -------------------------------------------------------------------------------------
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// deprecated
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// -------------------------------------------------------------------------------------
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/**
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* Use [`evaluate`](#evaluate) instead
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var evalState = function (ma, s) { return ma(s)[0]; };
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/**
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* Use [`execute`](#execute) instead
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var execState = function (ma, s) { return ma(s)[1]; };
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/**
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* This instance is deprecated, use small, specific instances instead.
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* For example if a function needs a `Functor` instance, pass `S.Functor` instead of `S.state`
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* (where `S` is from `import S from 'fp-ts/State'`)
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var state = Monad;
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