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44 kBJavaScriptView Raw
1import { isDevMode } from '@angular/core';
2import { isNgrxMockEnvironment } from './flags';
3export function isEqualCheck(a, b) {
4 return a === b;
5}
6function isArgumentsChanged(args, lastArguments, comparator) {
7 for (let i = 0; i < args.length; i++) {
8 if (!comparator(args[i], lastArguments[i])) {
9 return true;
10 }
11 }
12 return false;
13}
14export function resultMemoize(projectionFn, isResultEqual) {
15 return defaultMemoize(projectionFn, isEqualCheck, isResultEqual);
16}
17export function defaultMemoize(projectionFn, isArgumentsEqual = isEqualCheck, isResultEqual = isEqualCheck) {
18 let lastArguments = null;
19 // eslint-disable-next-line @typescript-eslint/no-explicit-any, , , , ,
20 let lastResult = null;
21 let overrideResult;
22 function reset() {
23 lastArguments = null;
24 lastResult = null;
25 }
26 function setResult(result = undefined) {
27 overrideResult = { result };
28 }
29 function clearResult() {
30 overrideResult = undefined;
31 }
32 /* eslint-disable prefer-rest-params, prefer-spread */
33 // disabled because of the use of `arguments`
34 function memoized() {
35 if (overrideResult !== undefined) {
36 return overrideResult.result;
37 }
38 if (!lastArguments) {
39 lastResult = projectionFn.apply(null, arguments);
40 lastArguments = arguments;
41 return lastResult;
42 }
43 if (!isArgumentsChanged(arguments, lastArguments, isArgumentsEqual)) {
44 return lastResult;
45 }
46 const newResult = projectionFn.apply(null, arguments);
47 lastArguments = arguments;
48 if (isResultEqual(lastResult, newResult)) {
49 return lastResult;
50 }
51 lastResult = newResult;
52 return newResult;
53 }
54 return { memoized, reset, setResult, clearResult };
55}
56export function createSelector(...input) {
57 return createSelectorFactory(defaultMemoize)(...input);
58}
59export function defaultStateFn(state, selectors, props, memoizedProjector) {
60 if (props === undefined) {
61 const args = selectors.map((fn) => fn(state));
62 return memoizedProjector.memoized.apply(null, args);
63 }
64 const args = selectors.map((fn) => fn(state, props));
65 return memoizedProjector.memoized.apply(null, [...args, props]);
66}
67/**
68 *
69 * @param memoize The function used to memoize selectors
70 * @param options Config Object that may include a `stateFn` function defining how to return the selector's value, given the entire `Store`'s state, parent `Selector`s, `Props`, and a `MemoizedProjection`
71 *
72 * @usageNotes
73 *
74 * **Creating a Selector Factory Where Array Order Does Not Matter**
75 *
76 * ```ts
77 * function removeMatch(arr: string[], target: string): string[] {
78 * const matchIndex = arr.indexOf(target);
79 * return [...arr.slice(0, matchIndex), ...arr.slice(matchIndex + 1)];
80 * }
81 *
82 * function orderDoesNotMatterComparer(a: any, b: any): boolean {
83 * if (!Array.isArray(a) || !Array.isArray(b)) {
84 * return a === b;
85 * }
86 * if (a.length !== b.length) {
87 * return false;
88 * }
89 * let tempB = [...b];
90 * function reduceToDetermineIfArraysContainSameContents(
91 * previousCallResult: boolean,
92 * arrayMember: any
93 * ): boolean {
94 * if (previousCallResult === false) {
95 * return false;
96 * }
97 * if (tempB.includes(arrayMember)) {
98 * tempB = removeMatch(tempB, arrayMember);
99 * return true;
100 * }
101 * return false;
102 * }
103 * return a.reduce(reduceToDetermineIfArraysContainSameContents, true);
104 * }
105 *
106 * export const creactOrderDoesNotMatterSelector = createSelectorFactory(
107 * (projectionFun) => defaultMemoize(
108 * projectionFun,
109 * orderDoesNotMatterComparer,
110 * orderDoesNotMatterComparer
111 * )
112 * );
113 * ```
114 *
115 * **Creating an Alternative Memoization Strategy**
116 *
117 * ```ts
118 * function serialize(x: any): string {
119 * return JSON.stringify(x);
120 * }
121 *
122 * export const createFullHistorySelector = createSelectorFactory(
123 * (projectionFunction) => {
124 * const cache = {};
125 *
126 * function memoized() {
127 * const serializedArguments = serialize(...arguments);
128 * if (cache[serializedArguments] != null) {
129 * cache[serializedArguments] = projectionFunction.apply(null, arguments);
130 * }
131 * return cache[serializedArguments];
132 * }
133 * return {
134 * memoized,
135 * reset: () => {},
136 * setResult: () => {},
137 * clearResult: () => {},
138 * };
139 * }
140 * );
141 * ```
142 *
143 *
144 */
145export function createSelectorFactory(memoize, options = {
146 stateFn: defaultStateFn,
147}) {
148 return function (...input) {
149 let args = input;
150 if (Array.isArray(args[0])) {
151 const [head, ...tail] = args;
152 args = [...head, ...tail];
153 }
154 const selectors = args.slice(0, args.length - 1);
155 const projector = args[args.length - 1];
156 const memoizedSelectors = selectors.filter((selector) => selector.release && typeof selector.release === 'function');
157 const memoizedProjector = memoize(function (...selectors) {
158 return projector.apply(null, selectors);
159 });
160 const memoizedState = defaultMemoize(function (state, props) {
161 return options.stateFn.apply(null, [
162 state,
163 selectors,
164 props,
165 memoizedProjector,
166 ]);
167 });
168 function release() {
169 memoizedState.reset();
170 memoizedProjector.reset();
171 memoizedSelectors.forEach((selector) => selector.release());
172 }
173 return Object.assign(memoizedState.memoized, {
174 release,
175 projector: memoizedProjector.memoized,
176 setResult: memoizedState.setResult,
177 clearResult: memoizedState.clearResult,
178 });
179 };
180}
181export function createFeatureSelector(featureName) {
182 return createSelector((state) => {
183 const featureState = state[featureName];
184 if (!isNgrxMockEnvironment() && isDevMode() && !(featureName in state)) {
185 console.warn(`@ngrx/store: The feature name "${featureName}" does ` +
186 'not exist in the state, therefore createFeatureSelector ' +
187 'cannot access it. Be sure it is imported in a loaded module ' +
188 `using StoreModule.forRoot('${featureName}', ...) or ` +
189 `StoreModule.forFeature('${featureName}', ...). If the default ` +
190 'state is intended to be undefined, as is the case with router ' +
191 'state, this development-only warning message can be ignored.');
192 }
193 return featureState;
194 }, (featureState) => featureState);
195}
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{ Selector, SelectorWithProps } from './models';\nimport { isDevMode } from '@angular/core';\nimport { isNgrxMockEnvironment } from './flags';\n\nexport type AnyFn = (...args: any[]) => any;\n\nexport type MemoizedProjection = {\n  memoized: AnyFn;\n  reset: () => void;\n  setResult: (result?: any) => void;\n  clearResult: () => void;\n};\n\nexport type MemoizeFn = (t: AnyFn) => MemoizedProjection;\n\nexport type ComparatorFn = (a: any, b: any) => boolean;\n\nexport type DefaultProjectorFn<T> = (...args: any[]) => T;\n\nexport interface MemoizedSelector<\n  State,\n  Result,\n  ProjectorFn = DefaultProjectorFn<Result>\n> extends Selector<State, Result> {\n  release(): void;\n  projector: ProjectorFn;\n  setResult: (result?: Result) => void;\n  clearResult: () => void;\n}\n\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport interface MemoizedSelectorWithProps<\n  State,\n  Props,\n  Result,\n  ProjectorFn = DefaultProjectorFn<Result>\n> extends SelectorWithProps<State, Props, Result> {\n  release(): void;\n  projector: ProjectorFn;\n  setResult: (result?: Result) => void;\n  clearResult: () => void;\n}\n\nexport function isEqualCheck(a: any, b: any): boolean {\n  return a === b;\n}\n\nfunction isArgumentsChanged(\n  args: IArguments,\n  lastArguments: IArguments,\n  comparator: ComparatorFn\n) {\n  for (let i = 0; i < args.length; i++) {\n    if (!comparator(args[i], lastArguments[i])) {\n      return true;\n    }\n  }\n  return false;\n}\n\nexport function resultMemoize(\n  projectionFn: AnyFn,\n  isResultEqual: ComparatorFn\n) {\n  return defaultMemoize(projectionFn, isEqualCheck, isResultEqual);\n}\n\nexport function defaultMemoize(\n  projectionFn: AnyFn,\n  isArgumentsEqual = isEqualCheck,\n  isResultEqual = isEqualCheck\n): MemoizedProjection {\n  let lastArguments: null | IArguments = null;\n  // eslint-disable-next-line @typescript-eslint/no-explicit-any, , , , ,\n  let lastResult: any = null;\n  let overrideResult: any;\n\n  function reset() {\n    lastArguments = null;\n    lastResult = null;\n  }\n\n  function setResult(result: any = undefined) {\n    overrideResult = { result };\n  }\n\n  function clearResult() {\n    overrideResult = undefined;\n  }\n\n  /* eslint-disable prefer-rest-params, prefer-spread */\n  // disabled because of the use of `arguments`\n  function memoized(): any {\n    if (overrideResult !== undefined) {\n      return overrideResult.result;\n    }\n\n    if (!lastArguments) {\n      lastResult = projectionFn.apply(null, arguments as any);\n      lastArguments = arguments;\n      return lastResult;\n    }\n\n    if (!isArgumentsChanged(arguments, lastArguments, isArgumentsEqual)) {\n      return lastResult;\n    }\n\n    const newResult = projectionFn.apply(null, arguments as any);\n    lastArguments = arguments;\n\n    if (isResultEqual(lastResult, newResult)) {\n      return lastResult;\n    }\n\n    lastResult = newResult;\n\n    return newResult;\n  }\n\n  return { memoized, reset, setResult, clearResult };\n}\n\nexport function createSelector<State, S1, Result>(\n  s1: Selector<State, S1>,\n  projector: (s1: S1) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, Result>(\n  s1: SelectorWithProps<State, Props, S1>,\n  projector: (s1: S1, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\nexport function createSelector<State, S1, Result>(\n  selectors: [Selector<State, S1>],\n  projector: (s1: S1) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, Result>(\n  selectors: [SelectorWithProps<State, Props, S1>],\n  projector: (s1: S1, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector<State, S1, S2, Result>(\n  s1: Selector<State, S1>,\n  s2: Selector<State, S2>,\n  projector: (s1: S1, s2: S2) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, Result>(\n  s1: SelectorWithProps<State, Props, S1>,\n  s2: SelectorWithProps<State, Props, S2>,\n  projector: (s1: S1, s2: S2, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector<State, S1, S2, Result>(\n  selectors: [Selector<State, S1>, Selector<State, S2>],\n  projector: (s1: S1, s2: S2) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, Result>(\n  selectors: [\n    SelectorWithProps<State, Props, S1>,\n    SelectorWithProps<State, Props, S2>\n  ],\n  projector: (s1: S1, s2: S2, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector<State, S1, S2, S3, Result>(\n  s1: Selector<State, S1>,\n  s2: Selector<State, S2>,\n  s3: Selector<State, S3>,\n  projector: (s1: S1, s2: S2, s3: S3) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, S3, Result>(\n  s1: SelectorWithProps<State, Props, S1>,\n  s2: SelectorWithProps<State, Props, S2>,\n  s3: SelectorWithProps<State, Props, S3>,\n  projector: (s1: S1, s2: S2, s3: S3, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\nexport function createSelector<State, S1, S2, S3, Result>(\n  selectors: [Selector<State, S1>, Selector<State, S2>, Selector<State, S3>],\n  projector: (s1: S1, s2: S2, s3: S3) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, S3, Result>(\n  selectors: [\n    SelectorWithProps<State, Props, S1>,\n    SelectorWithProps<State, Props, S2>,\n    SelectorWithProps<State, Props, S3>\n  ],\n  projector: (s1: S1, s2: S2, s3: S3, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector<State, S1, S2, S3, S4, Result>(\n  s1: Selector<State, S1>,\n  s2: Selector<State, S2>,\n  s3: Selector<State, S3>,\n  s4: Selector<State, S4>,\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, S3, S4, Result>(\n  s1: SelectorWithProps<State, Props, S1>,\n  s2: SelectorWithProps<State, Props, S2>,\n  s3: SelectorWithProps<State, Props, S3>,\n  s4: SelectorWithProps<State, Props, S4>,\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\nexport function createSelector<State, S1, S2, S3, S4, Result>(\n  selectors: [\n    Selector<State, S1>,\n    Selector<State, S2>,\n    Selector<State, S3>,\n    Selector<State, S4>\n  ],\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, S3, S4, Result>(\n  selectors: [\n    SelectorWithProps<State, Props, S1>,\n    SelectorWithProps<State, Props, S2>,\n    SelectorWithProps<State, Props, S3>,\n    SelectorWithProps<State, Props, S4>\n  ],\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector<State, S1, S2, S3, S4, S5, Result>(\n  s1: Selector<State, S1>,\n  s2: Selector<State, S2>,\n  s3: Selector<State, S3>,\n  s4: Selector<State, S4>,\n  s5: Selector<State, S5>,\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, s5: S5) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, S3, S4, S5, Result>(\n  s1: SelectorWithProps<State, Props, S1>,\n  s2: SelectorWithProps<State, Props, S2>,\n  s3: SelectorWithProps<State, Props, S3>,\n  s4: SelectorWithProps<State, Props, S4>,\n  s5: SelectorWithProps<State, Props, S5>,\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, s5: S5, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\nexport function createSelector<State, S1, S2, S3, S4, S5, Result>(\n  selectors: [\n    Selector<State, S1>,\n    Selector<State, S2>,\n    Selector<State, S3>,\n    Selector<State, S4>,\n    Selector<State, S5>\n  ],\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, s5: S5) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, S3, S4, S5, Result>(\n  selectors: [\n    SelectorWithProps<State, Props, S1>,\n    SelectorWithProps<State, Props, S2>,\n    SelectorWithProps<State, Props, S3>,\n    SelectorWithProps<State, Props, S4>,\n    SelectorWithProps<State, Props, S5>\n  ],\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, s5: S5, props: Props) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector<State, S1, S2, S3, S4, S5, S6, Result>(\n  s1: Selector<State, S1>,\n  s2: Selector<State, S2>,\n  s3: Selector<State, S3>,\n  s4: Selector<State, S4>,\n  s5: Selector<State, S5>,\n  s6: Selector<State, S6>,\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, s5: S5, s6: S6) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, S3, S4, S5, S6, Result>(\n  s1: SelectorWithProps<State, Props, S1>,\n  s2: SelectorWithProps<State, Props, S2>,\n  s3: SelectorWithProps<State, Props, S3>,\n  s4: SelectorWithProps<State, Props, S4>,\n  s5: SelectorWithProps<State, Props, S5>,\n  s6: SelectorWithProps<State, Props, S6>,\n  projector: (\n    s1: S1,\n    s2: S2,\n    s3: S3,\n    s4: S4,\n    s5: S5,\n    s6: S6,\n    props: Props\n  ) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\nexport function createSelector<State, S1, S2, S3, S4, S5, S6, Result>(\n  selectors: [\n    Selector<State, S1>,\n    Selector<State, S2>,\n    Selector<State, S3>,\n    Selector<State, S4>,\n    Selector<State, S5>,\n    Selector<State, S6>\n  ],\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, s5: S5, s6: S6) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<State, Props, S1, S2, S3, S4, S5, S6, Result>(\n  selectors: [\n    SelectorWithProps<State, Props, S1>,\n    SelectorWithProps<State, Props, S2>,\n    SelectorWithProps<State, Props, S3>,\n    SelectorWithProps<State, Props, S4>,\n    SelectorWithProps<State, Props, S5>,\n    SelectorWithProps<State, Props, S6>\n  ],\n  projector: (\n    s1: S1,\n    s2: S2,\n    s3: S3,\n    s4: S4,\n    s5: S5,\n    s6: S6,\n    props: Props\n  ) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector<State, S1, S2, S3, S4, S5, S6, S7, Result>(\n  s1: Selector<State, S1>,\n  s2: Selector<State, S2>,\n  s3: Selector<State, S3>,\n  s4: Selector<State, S4>,\n  s5: Selector<State, S5>,\n  s6: Selector<State, S6>,\n  s7: Selector<State, S7>,\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, s5: S5, s6: S6, s7: S7) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<\n  State,\n  Props,\n  S1,\n  S2,\n  S3,\n  S4,\n  S5,\n  S6,\n  S7,\n  Result\n>(\n  s1: SelectorWithProps<State, Props, S1>,\n  s2: SelectorWithProps<State, Props, S2>,\n  s3: SelectorWithProps<State, Props, S3>,\n  s4: SelectorWithProps<State, Props, S4>,\n  s5: SelectorWithProps<State, Props, S5>,\n  s6: SelectorWithProps<State, Props, S6>,\n  s7: SelectorWithProps<State, Props, S7>,\n  projector: (\n    s1: S1,\n    s2: S2,\n    s3: S3,\n    s4: S4,\n    s5: S5,\n    s6: S6,\n    s7: S7,\n    props: Props\n  ) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\nexport function createSelector<State, S1, S2, S3, S4, S5, S6, S7, Result>(\n  selectors: [\n    Selector<State, S1>,\n    Selector<State, S2>,\n    Selector<State, S3>,\n    Selector<State, S4>,\n    Selector<State, S5>,\n    Selector<State, S6>,\n    Selector<State, S7>\n  ],\n  projector: (s1: S1, s2: S2, s3: S3, s4: S4, s5: S5, s6: S6, s7: S7) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<\n  State,\n  Props,\n  S1,\n  S2,\n  S3,\n  S4,\n  S5,\n  S6,\n  S7,\n  Result\n>(\n  selectors: [\n    SelectorWithProps<State, Props, S1>,\n    SelectorWithProps<State, Props, S2>,\n    SelectorWithProps<State, Props, S3>,\n    SelectorWithProps<State, Props, S4>,\n    SelectorWithProps<State, Props, S5>,\n    SelectorWithProps<State, Props, S6>,\n    SelectorWithProps<State, Props, S7>\n  ],\n  projector: (\n    s1: S1,\n    s2: S2,\n    s3: S3,\n    s4: S4,\n    s5: S5,\n    s6: S6,\n    s7: S7,\n    props: Props\n  ) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector<State, S1, S2, S3, S4, S5, S6, S7, S8, Result>(\n  s1: Selector<State, S1>,\n  s2: Selector<State, S2>,\n  s3: Selector<State, S3>,\n  s4: Selector<State, S4>,\n  s5: Selector<State, S5>,\n  s6: Selector<State, S6>,\n  s7: Selector<State, S7>,\n  s8: Selector<State, S8>,\n  projector: (\n    s1: S1,\n    s2: S2,\n    s3: S3,\n    s4: S4,\n    s5: S5,\n    s6: S6,\n    s7: S7,\n    s8: S8\n  ) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<\n  State,\n  Props,\n  S1,\n  S2,\n  S3,\n  S4,\n  S5,\n  S6,\n  S7,\n  S8,\n  Result\n>(\n  s1: SelectorWithProps<State, Props, S1>,\n  s2: SelectorWithProps<State, Props, S2>,\n  s3: SelectorWithProps<State, Props, S3>,\n  s4: SelectorWithProps<State, Props, S4>,\n  s5: SelectorWithProps<State, Props, S5>,\n  s6: SelectorWithProps<State, Props, S6>,\n  s7: SelectorWithProps<State, Props, S7>,\n  s8: SelectorWithProps<State, Props, S8>,\n  projector: (\n    s1: S1,\n    s2: S2,\n    s3: S3,\n    s4: S4,\n    s5: S5,\n    s6: S6,\n    s7: S7,\n    s8: S8,\n    props: Props\n  ) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\nexport function createSelector<State, S1, S2, S3, S4, S5, S6, S7, S8, Result>(\n  selectors: [\n    Selector<State, S1>,\n    Selector<State, S2>,\n    Selector<State, S3>,\n    Selector<State, S4>,\n    Selector<State, S5>,\n    Selector<State, S6>,\n    Selector<State, S7>,\n    Selector<State, S8>\n  ],\n  projector: (\n    s1: S1,\n    s2: S2,\n    s3: S3,\n    s4: S4,\n    s5: S5,\n    s6: S6,\n    s7: S7,\n    s8: S8\n  ) => Result\n): MemoizedSelector<State, Result>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelector<\n  State,\n  Props,\n  S1,\n  S2,\n  S3,\n  S4,\n  S5,\n  S6,\n  S7,\n  S8,\n  Result\n>(\n  selectors: [\n    SelectorWithProps<State, Props, S1>,\n    SelectorWithProps<State, Props, S2>,\n    SelectorWithProps<State, Props, S3>,\n    SelectorWithProps<State, Props, S4>,\n    SelectorWithProps<State, Props, S5>,\n    SelectorWithProps<State, Props, S6>,\n    SelectorWithProps<State, Props, S7>,\n    SelectorWithProps<State, Props, S8>\n  ],\n  projector: (\n    s1: S1,\n    s2: S2,\n    s3: S3,\n    s4: S4,\n    s5: S5,\n    s6: S6,\n    s7: S7,\n    s8: S8,\n    props: Props\n  ) => Result\n): MemoizedSelectorWithProps<State, Props, Result>;\n\nexport function createSelector(\n  ...input: any[]\n): MemoizedSelector<any, any> | MemoizedSelectorWithProps<any, any, any> {\n  return createSelectorFactory(defaultMemoize)(...input);\n}\n\nexport function defaultStateFn(\n  state: any,\n  selectors: Selector<any, any>[] | SelectorWithProps<any, any, any>[],\n  props: any,\n  memoizedProjector: MemoizedProjection\n): any {\n  if (props === undefined) {\n    const args = (<Selector<any, any>[]>selectors).map((fn) => fn(state));\n    return memoizedProjector.memoized.apply(null, args);\n  }\n\n  const args = (<SelectorWithProps<any, any, any>[]>selectors).map((fn) =>\n    fn(state, props)\n  );\n  return memoizedProjector.memoized.apply(null, [...args, props]);\n}\n\nexport type SelectorFactoryConfig<T = any, V = any> = {\n  stateFn: (\n    state: T,\n    selectors: Selector<any, any>[],\n    props: any,\n    memoizedProjector: MemoizedProjection\n  ) => V;\n};\n\nexport function createSelectorFactory<T = any, V = any>(\n  memoize: MemoizeFn\n): (...input: any[]) => MemoizedSelector<T, V>;\nexport function createSelectorFactory<T = any, V = any>(\n  memoize: MemoizeFn,\n  options: SelectorFactoryConfig<T, V>\n): (...input: any[]) => MemoizedSelector<T, V>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelectorFactory<T = any, Props = any, V = any>(\n  memoize: MemoizeFn\n): (...input: any[]) => MemoizedSelectorWithProps<T, Props, V>;\n/**\n * @deprecated Selectors with props are deprecated, for more info see {@link https://github.com/ngrx/platform/issues/2980 Github Issue}\n */\nexport function createSelectorFactory<T = any, Props = any, V = any>(\n  memoize: MemoizeFn,\n  options: SelectorFactoryConfig<T, V>\n): (...input: any[]) => MemoizedSelectorWithProps<T, Props, V>;\n/**\n *\n * @param memoize The function used to memoize selectors\n * @param options Config Object that may include a `stateFn` function defining how to return the selector's value, given the entire `Store`'s state, parent `Selector`s, `Props`, and a `MemoizedProjection`\n *\n * @usageNotes\n *\n * **Creating a Selector Factory Where Array Order Does Not Matter**\n *\n * ```ts\n * function removeMatch(arr: string[], target: string): string[] {\n *   const matchIndex = arr.indexOf(target);\n *   return [...arr.slice(0, matchIndex), ...arr.slice(matchIndex + 1)];\n * }\n *\n * function orderDoesNotMatterComparer(a: any, b: any): boolean {\n *   if (!Array.isArray(a) || !Array.isArray(b)) {\n *     return a === b;\n *   }\n *   if (a.length !== b.length) {\n *     return false;\n *   }\n *   let tempB = [...b];\n *   function reduceToDetermineIfArraysContainSameContents(\n *     previousCallResult: boolean,\n *     arrayMember: any\n *   ): boolean {\n *     if (previousCallResult === false) {\n *       return false;\n *     }\n *     if (tempB.includes(arrayMember)) {\n *       tempB = removeMatch(tempB, arrayMember);\n *       return true;\n *     }\n *     return false;\n *   }\n *   return a.reduce(reduceToDetermineIfArraysContainSameContents, true);\n * }\n *\n * export const creactOrderDoesNotMatterSelector = createSelectorFactory(\n *   (projectionFun) => defaultMemoize(\n *     projectionFun,\n *     orderDoesNotMatterComparer,\n *     orderDoesNotMatterComparer\n *   )\n * );\n * ```\n *\n * **Creating an Alternative Memoization Strategy**\n *\n * ```ts\n * function serialize(x: any): string {\n *   return JSON.stringify(x);\n * }\n *\n * export const createFullHistorySelector = createSelectorFactory(\n *  (projectionFunction) => {\n *    const cache = {};\n *\n *    function memoized() {\n *      const serializedArguments = serialize(...arguments);\n *       if (cache[serializedArguments] != null) {\n *         cache[serializedArguments] = projectionFunction.apply(null, arguments);\n *       }\n *       return cache[serializedArguments];\n *     }\n *     return {\n *       memoized,\n *       reset: () => {},\n *       setResult: () => {},\n *       clearResult: () => {},\n *     };\n *   }\n * );\n * ```\n *\n *\n */\nexport function createSelectorFactory(\n  memoize: MemoizeFn,\n  options: SelectorFactoryConfig<any, any> = {\n    stateFn: defaultStateFn,\n  }\n) {\n  return function (\n    ...input: any[]\n  ): MemoizedSelector<any, any> | MemoizedSelectorWithProps<any, any, any> {\n    let args = input;\n    if (Array.isArray(args[0])) {\n      const [head, ...tail] = args;\n      args = [...head, ...tail];\n    }\n\n    const selectors = args.slice(0, args.length - 1);\n    const projector = args[args.length - 1];\n    const memoizedSelectors = selectors.filter(\n      (selector: any) =>\n        selector.release && typeof selector.release === 'function'\n    );\n\n    const memoizedProjector = memoize(function (...selectors: any[]) {\n      return projector.apply(null, selectors);\n    });\n\n    const memoizedState = defaultMemoize(function (state: any, props: any) {\n      return options.stateFn.apply(null, [\n        state,\n        selectors,\n        props,\n        memoizedProjector,\n      ]);\n    });\n\n    function release() {\n      memoizedState.reset();\n      memoizedProjector.reset();\n\n      memoizedSelectors.forEach((selector) => selector.release());\n    }\n\n    return Object.assign(memoizedState.memoized, {\n      release,\n      projector: memoizedProjector.memoized,\n      setResult: memoizedState.setResult,\n      clearResult: memoizedState.clearResult,\n    });\n  };\n}\n\nexport function createFeatureSelector<T>(\n  featureName: string\n): MemoizedSelector<object, T>;\nexport function createFeatureSelector<T, V>(\n  featureName: keyof T\n): MemoizedSelector<T, V>;\nexport function createFeatureSelector(\n  featureName: any\n): MemoizedSelector<any, any> {\n  return createSelector(\n    (state: any) => {\n      const featureState = state[featureName];\n      if (!isNgrxMockEnvironment() && isDevMode() && !(featureName in state)) {\n        console.warn(\n          `@ngrx/store: The feature name \"${featureName}\" does ` +\n            'not exist in the state, therefore createFeatureSelector ' +\n            'cannot access it.  Be sure it is imported in a loaded module ' +\n            `using StoreModule.forRoot('${featureName}', ...) or ` +\n            `StoreModule.forFeature('${featureName}', ...).  If the default ` +\n            'state is intended to be undefined, as is the case with router ' +\n            'state, this development-only warning message can be ignored.'\n        );\n      }\n      return featureState;\n    },\n    (featureState: any) => featureState\n  );\n}\n"]}
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