1  var eq = require('./eq');
 2  
 3  /**
 4   * Gets the index at which the `key` is found in `array` of key-value pairs.
 5   *
 6   * @private
 7   * @param {Array} array The array to inspect.
 8   * @param {*} key The key to search for.
 9   * @returns {number} Returns the index of the matched value, else `-1`.
10   */
11  function assocIndexOf(array, key) {
12    var length = array.length;
13    while (length--) {
14      if (eq(array[length][0], key)) {
15        return length;
16      }
17    }
18    return -1;
19  }
20  
21  module.exports = assocIndexOf;