typescript-memoize - npm Package Compare versions

Comparing version 1.0.1 to 1.1.0

dist/es2015/memoize-decorator.d.ts

@@ -1,2 +0,9 @@
-export declare function Memoize(autoHashOrHashFn?: boolean | ((...args: any[]) => any)): (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => void;
-export declare function MemoizeExpiring(duration: number, autoHashOrHashFn?: boolean | ((...args: any[]) => any)): (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => void;
+interface MemoizeArgs {
+    expiring?: number;
+    hashFunction?: boolean | ((...args: any[]) => any);
+    tags?: string[];
+}
+export declare function Memoize(args?: MemoizeArgs | MemoizeArgs['hashFunction']): (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => void;
+export declare function MemoizeExpiring(expiring: number, hashFunction?: MemoizeArgs['hashFunction']): (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => void;
+export declare function clear(tags: string[]): number;
+export {};

dist/es2015/memoize-decorator.js

@@ -1,8 +0,19 @@
-export function Memoize(autoHashOrHashFn) {
+export function Memoize(args) {
+    let hashFunction;
+    let duration;
+    let tags;
+    if (typeof args === 'object') {
+        hashFunction = args.hashFunction;
+        duration = args.expiring;
+        tags = args.tags;
+    }
+    else {
+        hashFunction = args;
+    }
     return (target, propertyKey, descriptor) => {
         if (descriptor.value != null) {
-            descriptor.value = getNewFunction(descriptor.value, autoHashOrHashFn);
+            descriptor.value = getNewFunction(descriptor.value, hashFunction, duration, tags);
         }
         else if (descriptor.get != null) {
-            descriptor.get = getNewFunction(descriptor.get, autoHashOrHashFn);
+            descriptor.get = getNewFunction(descriptor.get, hashFunction, duration, tags);
         }
@@ -14,38 +25,54 @@ else {
 }
-export function MemoizeExpiring(duration, autoHashOrHashFn) {
-    return (target, propertyKey, descriptor) => {
-        if (descriptor.value != null) {
-            descriptor.value = getNewFunction(descriptor.value, autoHashOrHashFn, duration);
+export function MemoizeExpiring(expiring, hashFunction) {
+    return Memoize({
+        expiring,
+        hashFunction
+    });
+}
+const clearCacheTagsMap = new Map();
+export function clear(tags) {
+    const cleared = new Set();
+    for (const tag of tags) {
+        const maps = clearCacheTagsMap.get(tag);
+        if (maps) {
+            for (const mp of maps) {
+                if (!cleared.has(mp)) {
+                    mp.clear();
+                    cleared.add(mp);
+                }
+            }
         }
-        else if (descriptor.get != null) {
-            descriptor.get = getNewFunction(descriptor.get, autoHashOrHashFn, duration);
-        }
-        else {
-            throw 'Only put a Memoize() decorator on a method or get accessor.';
-        }
-    };
+    }
+    return cleared.size;
 }
-let counter = 0;
-function getNewFunction(originalMethod, autoHashOrHashFn, duration = 0) {
-    const identifier = ++counter;
+function getNewFunction(originalMethod, hashFunction, duration = 0, tags) {
+    const propMapName = Symbol(`__memoized_map__`);
     return function (...args) {
-        const propValName = `__memoized_value_${identifier}`;
-        const propMapName = `__memoized_map_${identifier}`;
         let returnedValue;
-        if (autoHashOrHashFn || args.length > 0 || duration > 0) {
-            if (!this.hasOwnProperty(propMapName)) {
-                Object.defineProperty(this, propMapName, {
-                    configurable: false,
-                    enumerable: false,
-                    writable: false,
-                    value: new Map()
-                });
+        if (!this.hasOwnProperty(propMapName)) {
+            Object.defineProperty(this, propMapName, {
+                configurable: false,
+                enumerable: false,
+                writable: false,
+                value: new Map()
+            });
+        }
+        let myMap = this[propMapName];
+        if (Array.isArray(tags)) {
+            for (const tag of tags) {
+                if (clearCacheTagsMap.has(tag)) {
+                    clearCacheTagsMap.get(tag).push(myMap);
+                }
+                else {
+                    clearCacheTagsMap.set(tag, [myMap]);
+                }
             }
-            let myMap = this[propMapName];
+        }
+        if (hashFunction || args.length > 0 || duration > 0) {
             let hashKey;
-            if (autoHashOrHashFn === true) {
+            if (hashFunction === true) {
                 hashKey = args.map(a => a.toString()).join('!');
             }
-            else if (autoHashOrHashFn) {
-                hashKey = autoHashOrHashFn.apply(this, args);
+            else if (hashFunction) {
+                hashKey = hashFunction.apply(this, args);
             }
@@ -78,13 +105,9 @@ else {
         else {
-            if (this.hasOwnProperty(propValName)) {
-                returnedValue = this[propValName];
+            const hashKey = this;
+            if (myMap.has(hashKey)) {
+                returnedValue = myMap.get(hashKey);
             }
             else {
                 returnedValue = originalMethod.apply(this, args);
-                Object.defineProperty(this, propValName, {
-                    configurable: false,
-                    enumerable: false,
-                    writable: false,
-                    value: returnedValue
-                });
+                myMap.set(hashKey, returnedValue);
             }
@@ -91,0 +114,0 @@ }

dist/memoize-decorator.d.ts

@@ -1,2 +0,9 @@
-export declare function Memoize(autoHashOrHashFn?: boolean | ((...args: any[]) => any)): (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => void;
-export declare function MemoizeExpiring(duration: number, autoHashOrHashFn?: boolean | ((...args: any[]) => any)): (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => void;
+interface MemoizeArgs {
+    expiring?: number;
+    hashFunction?: boolean | ((...args: any[]) => any);
+    tags?: string[];
+}
+export declare function Memoize(args?: MemoizeArgs | MemoizeArgs['hashFunction']): (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => void;
+export declare function MemoizeExpiring(expiring: number, hashFunction?: MemoizeArgs['hashFunction']): (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => void;
+export declare function clear(tags: string[]): number;
+export {};

dist/memoize-decorator.js

@@ -12,10 +12,21 @@ (function (factory) {
     Object.defineProperty(exports, "__esModule", { value: true });
-    exports.MemoizeExpiring = exports.Memoize = void 0;
-    function Memoize(autoHashOrHashFn) {
+    exports.clear = exports.MemoizeExpiring = exports.Memoize = void 0;
+    function Memoize(args) {
+        var hashFunction;
+        var duration;
+        var tags;
+        if (typeof args === 'object') {
+            hashFunction = args.hashFunction;
+            duration = args.expiring;
+            tags = args.tags;
+        }
+        else {
+            hashFunction = args;
+        }
         return function (target, propertyKey, descriptor) {
             if (descriptor.value != null) {
-                descriptor.value = getNewFunction(descriptor.value, autoHashOrHashFn);
+                descriptor.value = getNewFunction(descriptor.value, hashFunction, duration, tags);
             }
             else if (descriptor.get != null) {
-                descriptor.get = getNewFunction(descriptor.get, autoHashOrHashFn);
+                descriptor.get = getNewFunction(descriptor.get, hashFunction, duration, tags);
             }
@@ -28,20 +39,31 @@ else {
     exports.Memoize = Memoize;
-    function MemoizeExpiring(duration, autoHashOrHashFn) {
-        return function (target, propertyKey, descriptor) {
-            if (descriptor.value != null) {
-                descriptor.value = getNewFunction(descriptor.value, autoHashOrHashFn, duration);
+    function MemoizeExpiring(expiring, hashFunction) {
+        return Memoize({
+            expiring: expiring,
+            hashFunction: hashFunction
+        });
+    }
+    exports.MemoizeExpiring = MemoizeExpiring;
+    var clearCacheTagsMap = new Map();
+    function clear(tags) {
+        var cleared = new Set();
+        for (var _i = 0, tags_1 = tags; _i < tags_1.length; _i++) {
+            var tag = tags_1[_i];
+            var maps = clearCacheTagsMap.get(tag);
+            if (maps) {
+                for (var _a = 0, maps_1 = maps; _a < maps_1.length; _a++) {
+                    var mp = maps_1[_a];
+                    if (!cleared.has(mp)) {
+                        mp.clear();
+                        cleared.add(mp);
+                    }
+                }
             }
-            else if (descriptor.get != null) {
-                descriptor.get = getNewFunction(descriptor.get, autoHashOrHashFn, duration);
-            }
-            else {
-                throw 'Only put a Memoize() decorator on a method or get accessor.';
-            }
-        };
+        }
+        return cleared.size;
     }
-    exports.MemoizeExpiring = MemoizeExpiring;
-    var counter = 0;
-    function getNewFunction(originalMethod, autoHashOrHashFn, duration) {
+    exports.clear = clear;
+    function getNewFunction(originalMethod, hashFunction, duration, tags) {
         if (duration === void 0) { duration = 0; }
-        var identifier = ++counter;
+        var propMapName = Symbol("__memoized_map__");
         return function () {
@@ -52,21 +74,30 @@ var args = [];
             }
-            var propValName = "__memoized_value_" + identifier;
-            var propMapName = "__memoized_map_" + identifier;
             var returnedValue;
-            if (autoHashOrHashFn || args.length > 0 || duration > 0) {
-                if (!this.hasOwnProperty(propMapName)) {
-                    Object.defineProperty(this, propMapName, {
-                        configurable: false,
-                        enumerable: false,
-                        writable: false,
-                        value: new Map()
-                    });
+            if (!this.hasOwnProperty(propMapName)) {
+                Object.defineProperty(this, propMapName, {
+                    configurable: false,
+                    enumerable: false,
+                    writable: false,
+                    value: new Map()
+                });
+            }
+            var myMap = this[propMapName];
+            if (Array.isArray(tags)) {
+                for (var _a = 0, tags_2 = tags; _a < tags_2.length; _a++) {
+                    var tag = tags_2[_a];
+                    if (clearCacheTagsMap.has(tag)) {
+                        clearCacheTagsMap.get(tag).push(myMap);
+                    }
+                    else {
+                        clearCacheTagsMap.set(tag, [myMap]);
+                    }
                 }
-                var myMap = this[propMapName];
+            }
+            if (hashFunction || args.length > 0 || duration > 0) {
                 var hashKey = void 0;
-                if (autoHashOrHashFn === true) {
+                if (hashFunction === true) {
                     hashKey = args.map(function (a) { return a.toString(); }).join('!');
                 }
-                else if (autoHashOrHashFn) {
-                    hashKey = autoHashOrHashFn.apply(this, args);
+                else if (hashFunction) {
+                    hashKey = hashFunction.apply(this, args);
                 }
@@ -99,13 +130,9 @@ else {
             else {
-                if (this.hasOwnProperty(propValName)) {
-                    returnedValue = this[propValName];
+                var hashKey = this;
+                if (myMap.has(hashKey)) {
+                    returnedValue = myMap.get(hashKey);
                 }
                 else {
                     returnedValue = originalMethod.apply(this, args);
-                    Object.defineProperty(this, propValName, {
-                        configurable: false,
-                        enumerable: false,
-                        writable: false,
-                        value: returnedValue
-                    });
+                    myMap.set(hashKey, returnedValue);
                 }
@@ -112,0 +139,0 @@ }

package.json

 {
   "name": "typescript-memoize",
-  "version": "1.0.1",
+  "version": "1.1.0",
   "description": "Memoize decorator for Typescript",
@@ -5,0 +5,0 @@ "main": "./dist/memoize-decorator.js",

README.md

@@ -166,2 +166,13 @@ # typescript-memoize
 
+	// Memoize also accepts parameters via a single object argument
+	@Memoize({
+		expiring: 10000,
+		hashFunction: (name: string, planet: string) => {
+			return name + ';' + string;
+		}
+	})
+	public getSameBetterGreeting(name: string, planet: string) {
+		return 'Hello, ' + name + '! Welcome to ' + planet;
+	}
+
 }
@@ -179,3 +190,3 @@ ```
 // 'Hello, Darryl! Welcome to Mars'
-let greeeterVal2 = moreComplicatedFoo.getBetterGreeting('Darryl', 'Mars');
+let greeterVal2 = moreComplicatedFoo.getBetterGreeting('Darryl', 'Mars');
 
@@ -186,1 +197,73 @@ // Fill up the computer with useless greetings:
 ```
+
+## Memoize accepts one or more "tag" strings that allow the cache to be invalidated on command
+
+Passing an array with one or more "tag" strings these will allow you to later clear the cache of results associated with methods or the `get`accessors using the `clear()` function.
+
+The `clear()` function also requires an array of "tag" strings.
+
+```typescript
+import {Memoize} from 'typescript-memoize';
+
+class ClearableFoo {
+
+	// Memoize accepts tags
+	@Memoize({ tags: ["foo", "bar"] })
+	public getClearableGreeting(name: string, planet: string) {
+		return 'Hello, ' + name + '! Welcome to ' + planet;
+	}
+
+
+	// Memoize accepts tags
+	@Memoize({ tags: ["bar"] })
+	public getClearableSum(a: number, b: number) {
+		return a + b;
+	}
+
+}
+```
+
+We call these methods from somewhere else in our code.
+
+```typescript
+import {clear} from 'typescript-memoize';
+
+let clearableFoo = new ClearableFoo();
+
+// 'Hello, Darryl! Welcome to Earth'
+let greeterVal1 = clearableFoo.getClearableGreeting('Darryl', 'Earth');
+
+// Ignores the second parameter, and returns memoized value
+// 'Hello, Darryl! Welcome to Earth'
+let greeterVal2 = clearableFoo.getClearableGreeting('Darryl', 'Mars');
+
+// '3'
+let sum1 = clearableFoo.getClearableSum(2, 1);
+
+// Ignores the second parameter, and returns memoized value
+// '3'
+let sum2 = clearableFoo.getClearableSum(2, 2);
+
+clear(["foo"]);
+
+// The memoized values are cleared, return a new value
+// 'Hello, Darryl! Welcome to Mars'
+let greeterVal3 = clearableFoo.getClearableGreeting('Darryl', 'Mars');
+
+
+// The memoized value is not associated with 'foo' tag, returns memoized value
+// '3'
+let sum3 = clearableFoo.getClearableSum(2, 2);
+
+clear(["bar"]);
+
+// The memoized values are cleared, return a new value
+// 'Hello, Darryl! Welcome to Earth'
+let greeterVal4 = clearableFoo.getClearableGreeting('Darryl', 'Earth');
+
+
+// The memoized values are cleared, return a new value
+// '4'
+let sum4 = clearableFoo.getClearableSum(2, 2);
+
+```

src/memoize-decorator.ts

@@ -1,60 +0,92 @@
-export function Memoize(autoHashOrHashFn?: boolean | ((...args: any[]) => any)) {
+interface MemoizeArgs {
+	expiring?: number;
+	hashFunction?: boolean | ((...args: any[]) => any);
+	tags?: string[];
+}
+
+export function Memoize(args?: MemoizeArgs | MemoizeArgs['hashFunction']) {
+	let hashFunction: MemoizeArgs['hashFunction'];
+	let duration: MemoizeArgs['expiring'];
+	let tags: MemoizeArgs['tags'];
+
+	if (typeof args === 'object') {
+		hashFunction = args.hashFunction;
+		duration = args.expiring;
+		tags = args.tags;
+	} else {
+		hashFunction = args;
+	}
+
 	return (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => {
-
 		if (descriptor.value != null) {
-			descriptor.value = getNewFunction(descriptor.value, autoHashOrHashFn);
+			descriptor.value = getNewFunction(descriptor.value, hashFunction, duration, tags);
 		} else if (descriptor.get != null) {
-			descriptor.get = getNewFunction(descriptor.get, autoHashOrHashFn);
+			descriptor.get = getNewFunction(descriptor.get, hashFunction, duration, tags);
 		} else {
 			throw 'Only put a Memoize() decorator on a method or get accessor.';
 		}
-
 	};
 }
 
-export function MemoizeExpiring(duration: number, autoHashOrHashFn?: boolean | ((...args: any[]) => any)) {
-	return (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => {
+export function MemoizeExpiring(expiring: number, hashFunction?: MemoizeArgs['hashFunction']) {
+	return Memoize({
+		expiring,
+		hashFunction
+	});
+}
 
-		if (descriptor.value != null) {
-			descriptor.value = getNewFunction(descriptor.value, autoHashOrHashFn, duration);
-		} else if (descriptor.get != null) {
-			descriptor.get = getNewFunction(descriptor.get, autoHashOrHashFn, duration);
-		} else {
-			throw 'Only put a Memoize() decorator on a method or get accessor.';
+const clearCacheTagsMap: Map<string, Map<any, any>[]> = new Map();
+
+export function clear (tags: string[]): number {
+	const cleared: Set<Map<any, any>> = new Set();
+	for (const tag of tags) {
+		const maps = clearCacheTagsMap.get(tag);
+		if (maps) {
+			for (const mp of maps) {
+				if (!cleared.has(mp)) {
+					mp.clear();
+					cleared.add(mp);
+				}
+			}
 		}
-
-	};
+	}
+	return cleared.size;
 }
 
-let counter = 0;
-function getNewFunction(originalMethod: () => void, autoHashOrHashFn?: boolean | ((...args: any[]) => any), duration: number = 0) {
-	const identifier = ++counter;
+function getNewFunction(originalMethod: () => void, hashFunction?: MemoizeArgs['hashFunction'], duration: number = 0, tags?: MemoizeArgs['tags']) {
+	const propMapName = Symbol(`__memoized_map__`);
 
 	// The function returned here gets called instead of originalMethod.
 	return function (...args: any[]) {
-		const propValName = `__memoized_value_${identifier}`;
-		const propMapName = `__memoized_map_${identifier}`;
-
 		let returnedValue: any;
 
-		if (autoHashOrHashFn || args.length > 0 || duration > 0) {
+		// Get or create map
+		if (!this.hasOwnProperty(propMapName)) {
+			Object.defineProperty(this, propMapName, {
+				configurable: false,
+				enumerable: false,
+				writable: false,
+				value: new Map<any, any>()
+			});
+		}
+		let myMap: Map<any, any> = this[propMapName];
 
-			// Get or create map
-			if (!this.hasOwnProperty(propMapName)) {
-				Object.defineProperty(this, propMapName, {
-					configurable: false,
-					enumerable: false,
-					writable: false,
-					value: new Map<any, any>()
-				});
+		if (Array.isArray(tags)) {
+			for (const tag of tags) {
+				if (clearCacheTagsMap.has(tag)) {
+					clearCacheTagsMap.get(tag).push(myMap);
+				} else {
+					clearCacheTagsMap.set(tag, [myMap]);
+				}
 			}
-			let myMap: Map<any, any> = this[propMapName];
+		}
 
+		if (hashFunction || args.length > 0 || duration > 0) {
 			let hashKey: any;
 
 			// If true is passed as first parameter, will automatically use every argument, passed to string
-			if (autoHashOrHashFn === true) {
+			if (hashFunction === true) {
 				hashKey = args.map(a => a.toString()).join('!');
-			} else if (autoHashOrHashFn) {
-				hashKey = autoHashOrHashFn.apply(this, args);
+			} else if (hashFunction) {
+				hashKey = hashFunction.apply(this, args);
 			} else {
@@ -87,13 +119,8 @@ hashKey = args[0];
 		} else {
-
-			if (this.hasOwnProperty(propValName)) {
-				returnedValue = this[propValName];
+			const hashKey = this;
+			if (myMap.has(hashKey)) {
+				returnedValue = myMap.get(hashKey);
 			} else {
 				returnedValue = originalMethod.apply(this, args);
-				Object.defineProperty(this, propValName, {
-					configurable: false,
-					enumerable: false,
-					writable: false,
-					value: returnedValue
-				});
+				myMap.set(hashKey, returnedValue);
 			}
@@ -100,0 +127,0 @@ }

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Improved metrics

Total package byte prevSize

29883

increased by21.06%

Lines of code

386

increased by31.29%

Number of lines in readme file

267

increased by45.11%

No dependency changes