diff --git a/src/index.js b/src/index.js deleted file mode 100644 index fbb2409..0000000 --- a/src/index.js +++ /dev/null @@ -1,75 +0,0 @@ -export function arraySome(arr, fn) { - return arr.reduce((carry, item, index, array) => { - return Boolean(fn(item, index, array)) || carry - }, false) -} - -export function arrayEvery(arr, fn) { - return arr.reduce((carry, item, index, array) => { - return Boolean(fn(item, index, array)) && carry - }, true) -} - -export function arrayMap(arr, fn) { - return arr.reduce((carry, item, index, array) => { - carry.push(fn(item, index, array)) - return carry; - }) -} - -export function arrayForEach(arr, fn) { - return arr.reduce((_, item, index, array) => { - fn(item, index, array) - }) -} - -export function arrayIncludes(arr, needle) { - return arraySome(arr, (item) => { - if (isNaN(item) && isNaN(needle)) { - return true - } - return item === needle - }) -} - -export function arraySlice(arr, start, stop = Infinity) { - start = (arr.length + (start % array.length)) - stop = Math.abs(stop) === Infinity ? stop : (arr.length + (stop % arr.length)) - - return arr.reduce((carry, item, index) => { - if (index >= start && item <= stop) { - carry.push(item) - } - return carry - }, []) -} - -export function arrayZip(arrGroup) { - const maxLength = arr.reduce((max, arr) => Math.max(max, arr.length), 0) - - return Array.from({ - length: maxLength - }, - (_, index) => index) - .reduce((carry, index) => { - carry.push( - arrGroup - .reduce((acc, arr) => { - acc.push(arr[index]) - return acc - }) - ) - return carry - }) -} - -// Bonus -// export const arrayIntersection = (arrGroup) => arrGroup.reduce((item, index) => index ? item : arrayFilter(item, item => arrayEvery(arraySlice(arrGroupitem, 1), (internalArray) => arrayIncludes(internalArray, item)), null)) -export function arrayUnion(arrGroup) { - return [ - ...arrGroup.reduce( - (carry, arr) => arrayForEach(arr, (item) => carry.add(item)) || carry, - new Set() - ) - ] -} diff --git a/src/index.ts b/src/index.ts new file mode 100644 index 0000000..67d5f7e --- /dev/null +++ b/src/index.ts @@ -0,0 +1,105 @@ + +export function arraySome(arr: T[], fn: (element: T, index: number, array: T[]) => boolean, thisArg: any = arr) { + fn = fn.bind(thisArg) + return arr.reduce((carry, item, index, arr) => { + return Boolean(fn(item, index, arr)) || carry + }, false) +} + +export function arrayEvery(arr: T[], fn: (element: T, index: number, array: T[]) => boolean, thisArg: any = arr) { + fn = fn.bind(thisArg) + return arr.reduce((carry, item, index, array) => { + return Boolean(fn(item, index, array)) && carry + }, true) +} +export function arrayMap(arr: T[], fn: (element: T, index: number, array: T[]) => U, thisArg: any = arr) { + fn = fn.bind(thisArg) + return arr.reduce((carry, item, index, array) => { + carry.push(fn(item, index, array)) + return carry; + }, [] as U[]) +} + +export function arrayForEach(arr: T[], fn: (element: T, index: number, array: T[]) => void, thisArg: any = arr) { + fn = fn.bind(thisArg) + arr.reduce((_, item, index, array) => { + fn(item, index, array) + return _ // typescript needs this cos it big dumb dumb (or I big dumb dumb) + }, undefined) +} + +export function arrayIncludes(arr: T[], needle: T, fromIndex = 0) { + return arraySome(arr, (item, index) => { + if (index < fromIndex) return false + if (isNaN(item as any) && isNaN(needle as any)) { + return true + } + return item === needle + }) +} + +export function arraySlice(array: T[], start = 0, stop = Infinity) { + start = (array.length + (start % array.length)) + stop = Math.abs(stop) === Infinity ? stop : (array.length + (stop % array.length)) + + return array.reduce((carry, item, index) => { + if (index >= start && index <= stop) { + carry.push(item) + } + return carry + }, [] as T[]) +} + +export function arrayFlat(array: (T | T[])[], depth = 1): (T | T[])[] { + return array.reduce((output, item) => { + if (Array.isArray(item) && depth >= 1) { + output.push(...arrayFlat(item, depth - 1)) + } else { + output.push(item) + } + return output + }, [] as (T | T[])[]) +} + +export function arrayFlatMap(array: T[], mapFn: (element: T, index: number, array: T[]) => U | U[], thisArg: any = array): U[] { + mapFn = mapFn.bind(thisArg) + return array.reduce((output, item, index, array) => { + const result = mapFn(item, index, array) + if (Array.isArray(result)) { + output.push(...result) + } else { + output.push(result) + } + return output + }, [] as U[]) +} + +export function arrayZip(arrGroup: T[][]) { + const maxLength = arrGroup.reduce((max, arr) => Math.max(max, arr.length), 0) + + return Array.from({ + length: maxLength + }, + (_, index) => index) + .reduce((carry, index) => { + carry.push( + arrGroup + .reduce((acc, arr) => { + acc.push(arr[index]) + return acc + }, [] as any[]) + ) + return carry + }, [] as any[]) +} + +// Bonus +// export const arrayIntersection = (arrGroup) => arrGroup.reduce((item, index) => index ? item : arrayFilter(item, item => arrayEvery(arraySlice(arrGroupitem, 1), (internalArray) => arrayIncludes(internalArray, item)), null)) +export function arrayUnion(arrGroup: T[][]) { + return [ + ...arrGroup.reduce( + (carry, arr) => arrayForEach(arr, (item) => carry.add(item)) as undefined || carry, + new Set() + ) + ] +} diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..13ca9f0 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,75 @@ +{ + "compilerOptions": { + /* Basic Options */ + // "incremental": true, /* Enable incremental compilation */ + "target": "es2015", + /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */ + "module": "commonjs", + /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */ + "lib": ["es5", "es6", "es7", "es2018"], + /* 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. */ + // "outFile": "./", /* Concatenate and emit output to single file. */ + "outDir": "./dist", + /* Redirect output structure to the directory. */ + // "rootDir": "./", /* 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. */ + } +}