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Foreign key constraints: When to use ON UPDATE and ON DELETE
... interesting thing to do with that on an update, but I may be wrong.
And now on the ON DELETE side:
ON DELETE RESTRICT : the default : if you try to delete a company_id Id in table COMPANY the engine will reject the operation if one USER at least links on this company, can save your life.
ON DEL...
Performant Entity Serialization: BSON vs MessagePack (vs JSON)
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MessagePack now has a BINARY data type so the argument of 1-1 de-serialization compatibility to JSON is not entirely true anymore.
– zimbatm
Aug 19 '15 at 13:14
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How to get the difference between two arrays of objects in JavaScript
... @ScottSauyet: It's taken a while for me to find this answer again, but now it's quite a bit better :D
– Cerbrus
Jul 12 '17 at 14:45
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Can I record/play macros in Visual Studio 2012/2013/2015/2017/2019?
...ncluding macro record/replay, macro projects and the Macros IDE. While we know that macros have been valuable for those who use them, unfortunately our usage data shows that less than 1% of Visual Studio developers take advantage of this feature. Therefore, we’ve found ourselves investing more dee...
When should Flask.g be used?
...terns, as linked by Markus, explains some of the changes to g in 0.10:
g now lives in the application context.
Every request pushes a new application context, wiping the old one, so g can still be used to set flags per-request without change to code.
The application context is popped after teardow...
Read/write to Windows registry using Java
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I know this question is old, but it is the first search result on google to "java read/write to registry". Recently I found this amazing piece of code which:
Can read/write to ANY part of the registry.
DOES NOT USE JNI.
DOES...
What is an undefined reference/unresolved external symbol error and how do I fix it?
...ompiled a bunch of implementation files into object files or libraries and now you want to get them to work together.
Say you defined symbol a in a.cpp. Now, b.cpp declared that symbol and used it. Before linking, it simply assumes that that symbol was defined somewhere, but it doesn't yet care wher...
What is The Rule of Three?
...s in this style and get into trouble:
"I pushed a person into a vector and now I get crazy memory errors!"
Remember that by default, copying an object means copying its members,
but copying the name member merely copies a pointer, not the character array it points to!
This has several unpleasant eff...
What is the difference between YAML and JSON?
...k YAML will be a more robust and viable data serialization format.
Right now, AJAX and other web technologies tend to use JSON. YAML is currently being used more for offline data processes. For example, it is included by default in the C-based OpenCV computer vision package, whereas JSON is not.
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Does Parallel.ForEach limit the number of active threads?
...sure enough the 8000+ threads disappeared. I have tested it multiple times now with the same result.
– Jake Drew
Jun 24 '16 at 6:40
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