Filter file paths!

filter-file-paths.ts

import * as assert from 'assert';

const paths = [
    'src',
    'src/react-dom',
    'src/react-dom/src',
    'src/react-dom/src/client',
    'src/react-dom/src/client/ReactDOMHostConfig.js',
    'packages',
    'packages/react-dom',
    'packages/react-dom/src',
    'packages/react-dom/src/client',
    'packages/react-dom/src/client/ReactDOMHostConfig.js',
    'docs',
    'docs/api',
    'docs/api/foo.md',
    'docs/api/bar/bar.md',
    'docs/docco-api/bar/bar.md',
    'docs/docco-api/foo.md',
];

assert.strictEqual(paths.length, 16);

const excludeStartingWith = (exclusion:string) => (path: string) => !path.startsWith(exclusion);

assert.deepStrictEqual(
    paths
        .filter(excludeStartingWith('src'))
        .filter(excludeStartingWith('docs')), 
    [ 
        'packages', 
        'packages/react-dom',
        'packages/react-dom/src',
        'packages/react-dom/src/client',
        'packages/react-dom/src/client/ReactDOMHostConfig.js' 
    ]); 

assert.deepStrictEqual(
    paths
        .filter(excludeStartingWith('src'))
        .filter(excludeStartingWith('docs/docco-api')), 
    [ 
        'packages', 
        'packages/react-dom',
        'packages/react-dom/src',
        'packages/react-dom/src/client',
        'packages/react-dom/src/client/ReactDOMHostConfig.js',
        'docs',
        'docs/api',
        'docs/api/foo.md',
        'docs/api/bar/bar.md',
    ]);