Extract Dat!

Runs an extractor function against a value in order to pull out some other value. If the extractor function fails to pull the data out for any reason, extract-dat will suppress any errors and simply return the default value. Because SOMETIMES... you just want a value without all the whining.

Getting Started

• npm install --save extract-dat
• import extract from "extract-dat";

Interface

extract(dataValue, extractorFn, [defaultValue=null])
// => value or defaultValue

Argument	Type	Description
dataValue	Any	Value to be passed into extractorFn as the first parameter.
extractorFn	Function	Function to extract a value from dataValue.
defaultValue	Any	Value to be returned if extractorFn produces an error or returns undefined.

Example

import extract from "extract-dat";

const user = {
  phone: {type: 'home', number: '123-456-7890'},
  greet: 'Hello World',
  roles: ['editor', 'contributor']
};

const name = extract(user, x => x.name, 'Bob');
// => "Bob"

const greeting = extract(user, x => x.greet, 'HI!');
// => "Hello World"

const email = extract(user, x => x.email);
// => null

const isAdmin = extract(user, x => x.roles.includes('admin'), false);
// => false

const isEditor = extract(user, x => x.roles.includes('editor'), false);
// => true

const formattedPhone = extract(user, x => `${x.phone.number} (${x.phone.type})`, 'No Phone Number');
// => "123-456-7890 (home)"

Lib Dat!

extract-dat is part of lib-dat, a suite of tools that all...

• Have ZERO dependencies.
• Do one task well.
• Make it easier to work with data.