init component
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Robin COuret
340
node_modules/fp-ts/es6/IO.js
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340
node_modules/fp-ts/es6/IO.js
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/**
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* ```ts
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* interface IO<A> {
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* (): A
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* }
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* ```
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*
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* `IO<A>` represents a non-deterministic synchronous computation that can cause side effects, yields a value of
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* type `A` and **never fails**.
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*
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* If you want to represent a synchronous computation that may fail, please see `IOEither`.
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* If you want to represent a synchronous computation that may yield nothing, please see `IOOption`.
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*
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* @since 2.0.0
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*/
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import { getApplicativeMonoid } from './Applicative';
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import { apFirst as apFirst_, apS as apS_, apSecond as apSecond_, getApplySemigroup } from './Apply';
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import * as chainable from './Chain';
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import { constant, dual, identity } from './function';
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import { as as as_, asUnit as asUnit_, bindTo as bindTo_, flap as flap_, let as let__ } from './Functor';
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import * as _ from './internal';
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var _map = function (ma, f) { return function () { return f(ma()); }; };
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var _ap = function (mab, ma) { return function () { return mab()(ma()); }; };
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var _chainRec = function (a, f) { return function () {
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var e = f(a)();
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while (e._tag === 'Left') {
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e = f(e.left)();
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}
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return e.right;
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}; };
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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 _map(fa, f); }; };
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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 _ap(fab, fa); }; };
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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 = constant;
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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 () {
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return f(ma())();
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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 = 'IO';
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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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* Maps the value to the specified constant value.
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*
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* @category mapping
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* @since 2.16.0
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*/
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export var as = dual(2, as_(Functor));
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/**
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* Maps the value to the void constant value.
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*
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* @category mapping
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* @since 2.16.0
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*/
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export var asUnit = asUnit_(Functor);
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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 zone of death
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* @since 2.7.0
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* @deprecated
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*/
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export var fromIO = identity;
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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 MonadIO = {
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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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fromIO: fromIO
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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 ChainRec = {
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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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chainRec: _chainRec
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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 FromIO = {
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URI: URI,
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fromIO: identity
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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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* @category do notation
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* @since 2.9.0
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*/
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export var Do = /*#__PURE__*/ of(_.emptyRecord);
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/**
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* @category do notation
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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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* @category do notation
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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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* @category do notation
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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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* @category do notation
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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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* @since 2.11.0
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*/
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export var ApT = /*#__PURE__*/ of(_.emptyReadonlyArray);
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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 () {
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var out = [f(0, _.head(as))()];
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for (var i = 1; i < as.length; i++) {
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out.push(f(i, as[i])());
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}
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return 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) : ApT); };
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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) {
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return traverseReadonlyArrayWithIndex(function (_, a) { return f(a); });
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};
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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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* This instance is deprecated, use small, specific instances instead.
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* For example if a function needs a `Functor` instance, pass `IO.Functor` instead of `IO.io`
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* (where `IO` is from `import IO from 'fp-ts/IO'`)
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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 io = {
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URI: URI,
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map: _map,
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of: of,
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ap: _ap,
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chain: flatMap,
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fromIO: fromIO,
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chainRec: _chainRec
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};
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/**
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* Use [`getApplySemigroup`](./Apply.ts.html#getapplysemigroup) 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 getSemigroup = /*#__PURE__*/ getApplySemigroup(Apply);
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/**
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* Use [`getApplicativeMonoid`](./Applicative.ts.html#getapplicativemonoid) 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 getMonoid = /*#__PURE__*/ getApplicativeMonoid(Applicative);
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