In Testing Side Effects Without the Side Effects, we explored a JavaScript Effect System where business logic doesn’t execute actions directly. Instead, it returns a description of what it intends to do in the form of a simple Command object. For example:
Range queries ask "what's inside this box?" But sometimes the question is "what's nearest to this location?" This is the nearest neighbor problem, and you don't know how big your search radius should be. The nearest point might be right next to you or far away.
，这一点在旺商聊官方下载中也有详细论述
Ac we nought free ne sindon, for-thy-the we never ne mighton from Wulfsfleet yewitan, nefne we thone Hlaford finden and hine ofslain. Se Hlaford hath thisne stede mid searocraftum yebounden, that none ne may hine forletan. We sindon here so fuglas on nete, so fishes on weir.。业内人士推荐同城约会作为进阶阅读
address this issue.