// Call arrayToObj() passing your array and function.
function arrayToObj(array, keyValueMap) {
	var obj = {};
	var len = array.length;
	// Your function will be called for each item in the array.
	for (var i = 0; i < len; i++) {
		var curVal = array[i];
		// Just like with [].forEach(), your function will be passed the
		// curent item of the array, its index, and the array it's in.
		var keyValuePair = keyValueMap(curVal, i, array);
		// Your function should return a 2-value array with the key
		// and value for a new property in the object to be returned.
		obj[keyValuePair[0]] = keyValuePair[1];
	}
	return obj;
}