1 | var baseAssignValue = require('./_baseAssignValue'),
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2 | eq = require('./eq');
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3 |
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4 | /** Used for built-in method references. */
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5 | var objectProto = Object.prototype;
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6 |
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7 | /** Used to check objects for own properties. */
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8 | var hasOwnProperty = objectProto.hasOwnProperty;
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9 |
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10 | /**
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11 | * Assigns `value` to `key` of `object` if the existing value is not equivalent
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12 | * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
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13 | * for equality comparisons.
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14 | *
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15 | * @private
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16 | * @param {Object} object The object to modify.
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17 | * @param {string} key The key of the property to assign.
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18 | * @param {*} value The value to assign.
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19 | */
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20 | function assignValue(object, key, value) {
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21 | var objValue = object[key];
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22 | if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
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23 | (value === undefined && !(key in object))) {
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24 | baseAssignValue(object, key, value);
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25 | }
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26 | }
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27 |
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28 | module.exports = assignValue;
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