| /** |
| * 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; |