pedantic-pick

This is an enhanced _.pick that runs validation expressions on picked attributes.

Usage

The function signature looks much like the one you're already used to: pick(object, [expressions...], [thisArg])

In addition to the standard usage of _.pick

pick({name: 'moe', age: 50, userid: 'moe1'}, 'name', 'age')
=> {name: 'moe', age: 50}

...you can do this with pedantic-pick:

pick({name: 'moe', age: 50, userid: 'moe1'}, '!string::name', 'number::age')
=> {name: 'moe', age: 50}

or, of course, use the shorthand form:

pick({name: 'moe', age: 50, userid: 'moe1'}, '!s::name', 'n::age')
=> {name: 'moe', age: 50}

and when something doesn't pass your rules an error is thrown (protip: use try/catch):

pick({name: 'moe', age: 50, userid: 'moe1'}, '!s::name', '!alias')
=> Error: alias failed validation

Expressions

Each given expression argument must conform to this "grammar": [!][validator::]key

Validators

The following validators are built-in (and later we'll accept custom validation functions as arguments):

• required (prefix the expression with !)
• number (or num or n)
• boolean (or bool or b)
• function (or fun or f)
• object (or o)
• string (or s)
• array (or a)
• nempstring (non-empty string; or nes)
• nemparray (non-empty array; or nea)

License

See LICENSE