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						- var isSymbol = require('./isSymbol');
 - 
 - /** Used as references for various `Number` constants. */
 - var INFINITY = 1 / 0;
 - 
 - /**
 -  * Converts `value` to a string key if it's not a string or symbol.
 -  *
 -  * @private
 -  * @param {*} value The value to inspect.
 -  * @returns {string|symbol} Returns the key.
 -  */
 - function toKey(value) {
 -   if (typeof value == 'string' || isSymbol(value)) {
 -     return value;
 -   }
 -   var result = (value + '');
 -   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 - }
 - 
 - module.exports = toKey;
 
 
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