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/**
* Gets the index at which the first occurrence of `NaN` is found in `array`.
*
* @private
* @param {Array} array The array to search.
* @param {number} fromIndex The index to search from.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {number} Returns the index of the matched `NaN`, else `-1`.
*/
function indexOfNaN(array, fromIndex, fromRight) {
var length = array.length,
index = fromIndex + (fromRight ? 0 : -1);
while ((fromRight ? index-- : ++index < length)) {
var other = array[index];
if (other !== other) {
return index;
}
}
return -1;
}
module.exports = indexOfNaN;
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