| 1 | /**
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| 2 | * Checks if `value` is suitable for use as unique object key.
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| 3 | *
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| 4 | * @private
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| 5 | * @param {*} value The value to check.
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| 6 | * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
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| 7 | */
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| 8 | function isKeyable(value) {
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| 9 | var type = typeof value;
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| 10 | return type == 'number' || type == 'boolean' ||
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| 11 | (type == 'string' && value != '__proto__') || value == null;
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| 12 | }
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| 13 |
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| 14 | export default isKeyable;
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