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glebcha/getType.js

Created April 21, 2020 07:59
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Check common js types
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getType.js
const modifier = type => item => Object.prototype.toString.call(item) === `[object ${type}]`;
const checkTypes = ['String', 'Function', 'Number', 'Boolean', 'Object', 'Symbol'];
const is = checkTypes.reduce((checkers, type) => ({ ...checkers, [type]: modifier(type) }), {});
is.Function(null)
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