more funcs + move to es2016 (#3)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "radash",
-  "version": "1.0.4",
+  "version": "1.0.7",
   "description": "A collection of useful and helpful functions",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/curry.ts

@@ -1,4 +1,4 @@
-type Func = (...args: any[]) => any | void
+export type Func<TArgs = any, KReturn = any | void> = (...args: TArgs[]) => KReturn
 
 export const chain = (...funcs: Func[]) => (...args: any[]) => {
   return funcs.slice(1).reduce((acc, fn) => fn(acc), funcs[0](...args))
@@ -29,8 +29,43 @@ export const tryit = <ResultType, ErrorType = Error>(func: Func) => async (
   }
 }
 
-export const proxied = <T, K> (cb: (arg: T) => K): Record<string, (arg: T) => K> => {
+export const proxied = <T, K>(cb: (arg: T) => K): Record<string, (arg: T) => K> => {
   return new Proxy({}, {
     get: (target, arg: any) => cb(arg)
   })
+}
+
+type Cache <T> = Record<string, { exp: number, value: T }>
+
+const memoize = <T>(
+  cache: Cache<T>, 
+  func: Func<any, T>, 
+  keyFunc: Func<string> | null,
+  ttl: number
+) => {
+  return function callWithMemo(...args: any): T {
+    const key = keyFunc ? keyFunc(args) : JSON.stringify({ args })
+    const existing = cache[key]
+    if (existing !== undefined) {
+      if (existing.exp > new Date().getTime()) {
+        return existing.value
+      }
+    }
+    const result = func(...args)
+    cache[key] = {
+      exp: new Date().getTime() + ttl,
+      value: result
+    }
+    return result
+  }
+}
+
+export const memo = <TFunc extends Function>(func: TFunc, {
+  key = null,
+  ttl = 300
+}: {
+  key?: Func<string> | null
+  ttl?: number
+} = {}) => {
+  return memoize({}, func as any, key, ttl) as any as TFunc
 }

src/index.ts

@@ -28,7 +28,8 @@ import {
   partial,
   proxied,
   partob,
-  tryit
+  tryit,
+  memo
 } from './curry'
 
 import {
@@ -49,7 +50,8 @@ import {
 import {
   isArray,
   isObject,
-  isFunction
+  isFunction,
+  isString
 } from './typed'
 
 import {
@@ -84,6 +86,7 @@ export default {
   isArray,
   isObject,
   isFunction,
+  isString,
   select,
   min,
   max,
@@ -92,5 +95,6 @@ export default {
   shuffle,
   dict,
   draw,
-  random
+  random,
+  memo
 }

src/typed.ts

@@ -9,4 +9,8 @@ export const isObject = (value: any) => {
 
 export const isFunction = (value: any) => {
   return !!(value && value.constructor && value.call && value.apply)
-}
+}
+
+export const isString = (val: any) => {
+  return typeof val === 'string' || val instanceof String
+}

tsconfig.json

@@ -1,67 +1,12 @@
 {
   "compilerOptions": {
-    /* Basic Options */
-    "incremental": true /* Enable incremental compilation */,
-    "target": "ES6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
-    "module": "amd" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
-    "lib": ["es2017", "es7", "es6", "dom", "es2020"] /* Specify library files to be included in the compilation. */,
-    // "allowJs": true,                       /* Allow javascript files to be compiled. */
-    // "checkJs": true,                       /* Report errors in .js files. */
-    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
-    "declaration": true /* Generates corresponding '.d.ts' file. */,
-    "declarationMap": true /* Generates a sourcemap for each corresponding '.d.ts' file. */,
-    "sourceMap": true /* Generates corresponding '.map' file. */,
-    "outDir": "dist" /* Redirect output structure to the directory. */,
-    "rootDir": "./src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
-    // "composite": true,                     /* Enable project compilation */
-    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
-    // "removeComments": true,                /* Do not emit comments to output. */
-    // "noEmit": true,                        /* Do not emit outputs. */
-    "importHelpers": true /* Import emit helpers from 'tslib'. */,
-    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
-    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-
-    /* Strict Type-Checking Options */
-    "strict": true /* Enable all strict type-checking options. */,
-    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
-    // "strictNullChecks": true,              /* Enable strict null checks. */
-    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
-    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
-    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
-    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
-    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-
-    /* Additional Checks */
-    // "noUnusedLocals": true,                /* Report errors on unused locals. */
-    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
-    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
-    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
-
-    /* Module Resolution Options */
-    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
-    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
-    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
-    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
-    // "typeRoots": [],                       /* List of folders to include type definitions from. */
-    // "types": [],                           /* Type declaration files to be included in compilation. */
-    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
-    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
-    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */
-
-    /* Source Map Options */
-    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
-    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
-    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-
-    /* Experimental Options */
-    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
-    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
-
-    /* Advanced Options */
-    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */,
-    "moduleResolution": "node"
+    "outDir": "dist",
+    "lib": ["es2016"],
+    "declaration": true,
+    "sourceMap": true
   },
+  "include": [
+    "src/**/*.ts"
+  ],
   "exclude": ["node_modules", "dist", "src/tests"]
 }