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JavaScript's functional programming helper library.

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var _tagTester = require('./_tagTester.js');
var _setup = require('./_setup.js');

var isFunction = _tagTester('Function');

// Optimize `isFunction` if appropriate. Work around some `typeof` bugs in old
// v8, IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
var nodelist = _setup.root.document && _setup.root.document.childNodes;
if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
  isFunction = function(obj) {
    return typeof obj == 'function' || false;
  };
}

var isFunction$1 = isFunction;

module.exports = isFunction$1;