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function mapValues(obj,fn) {
return Object.keys(obj).reduce((result,key)=>{
result[key]=fn(obj[key],key);
returnresult;
},{});
}
function pick(obj,fn){
return Object.keys(obj).reduce((result,key)=>{
if (fn(obj[key])){
result[key]= obj[key];
}
returnresult;
},{});
}
function bindActionCreator(actionCreator,dispatch){
return (...args)=>dispatch(actionCreator(...args));
}
exportfunction bindActionCreators(actionCreators,dispatch){
return typeofactionCreators=== 'function'?
bindActionCreator(actionCreators,dispatch):
mapValues(actionCreators,actionCreator=>
bindActionCreator(actionCreator,dispatch)
);
}
exportfunction compose(...funcs) {
return arg=> funcs.reduceRight((composed,f) =>f(composed),arg);
}
exportfunction applyMiddleware(...middlewares){
return (next)=> (reducer,initialState)=>{
varstore= next(reducer,initialState);
vardispatch=store.dispatch;
varchain=[];
chain=middlewares.map(middleware=>middleware({
getState: store.getState,
dispatch:(action)=>dispatch(action)
}));
dispatch=compose(...chain)(store.dispatch);
return{...store, dispatch};
};
}
exportfunction combineReducers(reducers){
varfinalReducers=pick(reducers,(val)=> typeofval ==='function');
return (state= {},action)=>mapValues(finalReducers,
(reducer,key)=>reducer(state[key],action)
);
}
exportfunction createStore(reducer,initialState){
varcurrentReducer= reducer;
varcurrentState =initialState;
varlisteners=[];
varisDispatching=false;
function getState() {
returncurrentState;
}
function subscribe(listener){
listeners.push(listener);
returnfunction unsubscribe(){
varindex= listeners.indexOf(listener);
listeners.splice(index,1);
};
}
function dispatch(action){
if (isDispatching){
throw new Error('Reducersmaynot dispatchactions.');
}
try {
isDispatching=true;
currentState =currentReducer(currentState,action);
}finally{
isDispatching=false;
}
listeners.slice().forEach(listener=> listener());
returnaction;
}
function (nextReducer){
currentReducer= nextReducer;
dispatch({type:'@@redux/INIT'});
}
dispatch({type: '@@redux/INIT'});
return {dispatch,subscribe,getState, replaceReducer};
}
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99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)
99 líneas que lo simplifican todo( sin animar)

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99 líneas que lo simplifican todo( sin animar)

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  • 15. function mapValues(obj,fn) { return Object.keys(obj).reduce((result,key)=>{ result[key]=fn(obj[key],key); returnresult; },{}); } function pick(obj,fn){ return Object.keys(obj).reduce((result,key)=>{ if (fn(obj[key])){ result[key]= obj[key]; } returnresult; },{}); } function bindActionCreator(actionCreator,dispatch){ return (...args)=>dispatch(actionCreator(...args)); } exportfunction bindActionCreators(actionCreators,dispatch){ return typeofactionCreators=== 'function'? bindActionCreator(actionCreators,dispatch): mapValues(actionCreators,actionCreator=> bindActionCreator(actionCreator,dispatch) ); } exportfunction compose(...funcs) { return arg=> funcs.reduceRight((composed,f) =>f(composed),arg); } exportfunction applyMiddleware(...middlewares){ return (next)=> (reducer,initialState)=>{ varstore= next(reducer,initialState); vardispatch=store.dispatch; varchain=[]; chain=middlewares.map(middleware=>middleware({ getState: store.getState, dispatch:(action)=>dispatch(action) })); dispatch=compose(...chain)(store.dispatch); return{...store, dispatch}; }; } exportfunction combineReducers(reducers){ varfinalReducers=pick(reducers,(val)=> typeofval ==='function'); return (state= {},action)=>mapValues(finalReducers, (reducer,key)=>reducer(state[key],action) ); } exportfunction createStore(reducer,initialState){ varcurrentReducer= reducer; varcurrentState =initialState; varlisteners=[]; varisDispatching=false; function getState() { returncurrentState; } function subscribe(listener){ listeners.push(listener); returnfunction unsubscribe(){ varindex= listeners.indexOf(listener); listeners.splice(index,1); }; } function dispatch(action){ if (isDispatching){ throw new Error('Reducersmaynot dispatchactions.'); } try { isDispatching=true; currentState =currentReducer(currentState,action); }finally{ isDispatching=false; } listeners.slice().forEach(listener=> listener()); returnaction; } function (nextReducer){ currentReducer= nextReducer; dispatch({type:'@@redux/INIT'}); } dispatch({type: '@@redux/INIT'}); return {dispatch,subscribe,getState, replaceReducer}; } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99