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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...
When writing a directive in AngularJS, how do I decide if I need no new scope, a new child scope, or
...e other directives or interpolated attributes here. The tooltip is just an enhancement. But the tooltip also needs to set some things on the scope to use with a sub-directive and/or template and obviously to manage its own state, so it would be quite bad indeed to use the parent scope. We are either...
Where do you store your salt strings?
...e it
separately from the data because the basic security of your system is enhanced.
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Can unit testing be successfully added into an existing production project? If so, how and is it wor
...en we went back and started adding unit tests when we fixed bugs, or added enhancements, or needed to understand some code. Regression tests in no way remove the need for unit tests; they're just a first-level safety net, so that you get some level of test coverage quickly. Then you can start refact...
How to use knockout.js with ASP.NET MVC ViewModels?
...ditional computed properties after server mapping you will need to further enhance your viewmodels on the client side.
For example:
var viewModel = ko.mapping.fromJS(model);
viewModel.capitalizedName = ko.computed(function() {...}, viewModel);
So everytime you map from raw JSON you would need t...
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...