例如

_.findKey = function(obj, predicate, context) { predicate = cb(predicate, context); var keys = _.keys(obj), key; for (var i = 0, length = keys.length; i < length; i++) { key = keys[i]; if (predicate(obj[key], key, obj)) return key; } };

这里的predicate该怎么翻译呢？

网上翻译是

不是很太懂