_countHolders.js
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_countHolders.js
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			/**
			* Gets the number of `placeholder` occurrences in `array`.
			*
			* @private
			* @param {Array} array The array to inspect.
			* @param {*} placeholder The placeholder to search for.
			* @returns {number} Returns the placeholder count.
			*/
			function countHolders(array, placeholder) {
			var length = array.length,
			result = 0;

			while (length--) {
			if (array[length] === placeholder) {
			++result;
			}
			}
			return result;
			}

			module.exports = countHolders;