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'use strict';
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var isObject = require('is-extendable');
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module.exports = function extend(o/*, objects*/) {
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  if (!isObject(o)) { o = {}; }
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  var len = arguments.length;
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  for (var i = 1; i < len; i++) {
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    var obj = arguments[i];
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    if (isObject(obj)) {
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      assign(o, obj);
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    }
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  }
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  return o;
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};
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function assign(a, b) {
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  for (var key in b) {
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    if (hasOwn(b, key)) {
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      a[key] = b[key];
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    }
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  }
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}
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/**
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 * Returns true if the given `key` is an own property of `obj`.
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 */
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function hasOwn(obj, key) {
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  return Object.prototype.hasOwnProperty.call(obj, key);
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}
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