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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...《App Inventor 2 MQTT拓展入门（保姆级教程）》
最新版拓展下载：
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MQTT（Message Queuing Telemetry Transport：消息队列遥测传输）
MQTT 发明于 1999 年，为物联网设计的轻量级协议，基于TCP协议实现。
M...
SQL JOIN and different types of JOINs
... from both tables. For implementation see INNER-JOIN.
Natural-Join: It is enhanced version of Equi-Join, in which SELECT
operation omits duplicate column. For implementation see INNER-JOIN
Non-Equi-Join: It is reverse of Equi-join where joining condition is uses other than equal operator(=) e.g, !=...
Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
...ed. Common bullet-proof solution does not seem to be feasible.
Stage 2: Enhanced compression, final conclusion
As was already mentioned in the previous section, any suitable compression technique can be used. So let's get rid of LZMA in favor of simpler and better (if possible) approach. There ...
Why should I use a pointer rather than the object itself?
...resource using the new operator is an anti-pattern" I think you could even enhance that to having a raw pointer own something is an anti-pattern. Not only the creation, but passing raw pointers as arguments or return values implying ownership transfer IMHO is deprecated since unique_ptr/move semanti...
C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ p
...etired) stores before writing the results to the caches. This optimization enhances performance but violates SC. The write buffer hides the latency of servicing a store miss. Because stores are common, being able to avoid stalling on most of them is an important benefit. For a single-core processor,...
Cross-browser testing: All major browsers on ONE machine
... extremely useful toolbar for web development. Saves much time.
Console2 - Enhances the built-in Console (Ctrl Shift> J).
Preferences: Tools > Options (Windows), Edit > Preferences (Linux)
General: Homepage
Security: Uncheck all settings, except for "Warn me when sites try to install add...
How does a hash table work?
...ning a letter from A to Z, you in theory have just segmented your data and enhanced the filing and retrieval process.
Hope this helps,
Jeach!
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Database development mistakes made by application developers [closed]
...arge data sets "close to the data".
I recently had to help maintain and enhance a large Delphi desktop application of which 70% of the business logic and rules were implemented in 1400 SQL Server stored procedures (the remainder in UI event handlers). This was a nightmare, primarily due to the d...
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展 · App Inventor 2 中文网
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最新版拓展下载：
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低功耗蓝牙，也称为蓝牙LE 或简称 BLE，是一种类似于经典蓝牙的新通信协议，不同之处在于它旨在消耗更少的功耗和成本，同时保持同...
Git and Mercurial - Compare and Contrast
...s saved at the commit time; in Mercurial this information is saved in the "enhanced diff" form in filelog (file revlog) metadata. The consequence of this is that you have to use hg rename / hg mv... or you need to remember to run hg addremove to do similarity based rename detection.
Git is unique a...