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and lightweight deep pattern matching for Javascript\n\n# pnmg\n[![Code Climate](https://codeclimate.com/github/surovv/pnmg/badges/gpa.svg)](https://codeclimate.com/github/surovv/pnmg) [![bitHound Overall Score](https://www.bithound.io/github/surovv/pnmg/badges/score.svg)](https://www.bithound.io/github/surovv/pnmg)\n\nPattern matching consists of specifying patterns to which some data should conform and then checking  to see if it does. Way to select behaviors based on the structure of a value in a similar way to destructuring.\n\nThe `pnmg` provides deep matching functionality with usefull extra types. Leads to write functional, immutable and expressive code.\n\n**switch** with ~~blackja...~~ declarative style and deep matching.\n\n## Installation\n\n###  NPM\n\n```sh\nnpm install --save pnmg\n```\n\n## Patterns\n\n### Object Patterns\nObject patterns match objects with certain properties. Additional properties may be present on the matched object.\nExamples:\n\n```js\nimport {match} from 'pnmg';\n\nconst arg = {/* data */};\n\nmatch(arg)\n  .when({}, () =\u003e {/* Match empty object */})\n  .when({users: Array}, ({users}) =\u003e users.map(user =\u003e user.id))\n  .when({x: 42, y: String}, obj =\u003e {/* Match object where x is 42 and y is String */})\n  .when(Object, () =\u003e {/* Match any object */})\n  .default(notObj =\u003e {/* default handler if none of patterns confirmed */});\n```\n\n### Array Patterns\nExamples:\n\n```js\nimport {match, Guard} from 'pnmg';\n\nmatch(arg)\n  .when([], () =\u003e {/* match an empty array */})\n  .when([true, false], () =\u003e 'First el is true, second is false')\n  .when([{WUF: 'WUFF'}], () =\u003e 'First element is Object with WUF attr with WUFF value')\n  .when(Guard(arr =\u003e arr.length \u003e 4), () =\u003e 'Array length greater than 4')\n  .when(Array, ([head, ...tail]) =\u003e `Head is ${head} and tails is ${tail}`)\n  .default(notArray =\u003e `${notArray} not Array`);\n```\n\n### Literal Patterns\nLiteral patterns are string, number, boolean, null, and undefined literals and matches exactly that value. 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