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base64 encoded images in email signatures
... to include some images (company logo's etc) in email signatures. I've had all sorts of issues using the embedded images produced by the email system in question (they get sent as attachments generally) and as linked images (requiring permission to display them in the email received).
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使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...hyay, D., & Sen, J. (2011). Internet of things: Applications and challenges in technology and standardization. Wireless Personal Communications, 58(1), 4969.
[2] Wolber, D., Abelson, H., Spertus, E., & Looney, L. (2011). App Inventor. ” O’Reilly Media, Inc.”.
[3] Macke...
Why C# fails to compare two object types with each other but VB doesn't?
..., as things like Option Compare can affect how text is compared.
Fundamentally the operators don't work the same way and aren't intended to work the same way.
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What is “Argument-Dependent Lookup” (aka ADL, or “Koenig Lookup”)?
... good explanations on what argument dependent lookup is? Many people also call it Koenig Lookup as well.
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App Launcher 应用启动器扩展：用于启动其他应用程序的强大工具，支持独立...
... getNameList 或 getPackageList 函数中列出所有文件，需要 QUERY_ALL_PACKAGES 权限
动机
App Inventor允许使用ActivityStarter组件启动其他活动。不幸的是，启动已安装的应用程序非常麻烦。根据说明，必须下载要启动...
Difference between timestamps with/without time zone in PostgreSQL
...rpreted.
The effects of time zones on these data types is covered specifically in the docs. The difference arises from what the system can reasonably know about the value:
With a time zone as part of the value, the value can be rendered as a local time in the client.
Without a time zone as part o...
What is the meaning of “non temporal” memory accesses in x86
...e needed again in favor of data which will not be used soon. This is especially true for large data structures, like matrices, which are filled and then used later. Before the last element of the matrix is filled the sheer size evicts the first elements, making caching of the writes ineffective.
Fo...
What is the best way to use a HashMap in C++?
...p the elements are sorted by the key, insert and access is in O(log n). Usually the standard library internally uses red black trees for ordered maps. But this is just an implementation detail. In an unordered map insert and access is in O(1). It is just another name for a hashtable.
An example wit...
What does auto&& tell us?
...value or rvalue expression and I will preserve its constness. This is typically used for forwarding (usually with T&&). The reason this works is because a "universal reference", auto&& or T&&, will bind to anything.
You might say, well why not just use a const auto& beca...
Why do we copy then move?
...rvalues, the above would not compile.
Won't a copy be expensive, especially given something like std::string?
If you pass an rvalue, that will be moved into str, and that will eventually be moved into data. No copying will be performed. If you pass an lvalue, on the other hand, that lvalue wil...