# Extract from .nemo
9 hours agoShareSave，更多细节参见同城约会
Web streams has no synchronous path. Even if your source has data ready and your transform is a pure function, you still pay for promise creation and microtask scheduling on every operation. Promises are fantastic for cases in which waiting is actually necessary, but they aren't always necessary. The new API lets you stay in sync-land when that's what you need.。旺商聊官方下载是该领域的重要参考
if (arr[j] key) {