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Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
I'm having a little trouble understanding the pass-by-reference properties of data.table . Some operations seem to 'break' the reference, and I'd like to understand exactly what's happening.
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How do detect Android Tablets in general. Useragent?
I have looked everywhere. We are using a Motorola Zoom to try our tablet site testing.
The issue is that the Android Useragent is a general Useragent and there is no difference between tablet Android and mobile Android. I don't want to just target a specific device like the Xoom Useragent since And...
In C#, What is a monad?
There is a lot of talk about monads these days. I have read a few articles / blog posts, but I can't go far enough with their examples to fully grasp the concept. The reason is that monads are a functional language concept, and thus the examples are in languages I haven't worked with (since I haven'...
How do you merge two Git repositories?
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A single branch of another repository can be easily placed under a subdirectory retaining its history. For example:
git subtree add --prefix=rails git://github.com/rails/rails.git master
This will appear as a single commit where al...
What is the difference between a definition and a declaration?
The meaning of both eludes me.
23 Answers
23
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Is there a method to generate a UUID with go language
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u[8] = (u[8] | 0x80) & 0xBF // what's the purpose ?
u[6] = (u[6] | 0x40) & 0x4F // what's the purpose ?
These lines clamp the values of byte 6 and 8 to a specific range. rand.Read returns random bytes in the range 0-255, which are not all valid...
String comparison in Python: is vs. == [duplicate]
...the loop condition was while line is not '' . Running through it in the debugger, it turned out that line was in fact '' . When I changed it to !='' rather than is not '' , it worked fine.
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Best practice for partial updates in a RESTful service
...STful service for a customer management system and I am trying to find the best practice for updating records partially. For example, I want the caller to be able to read the full record with a GET request. But for updating it only certain operations on the record are allowed, like change the status...
'any' vs 'Object'
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Object is more restrictive than any. For example:
let a: any;
let b: Object;
a.nomethod(); // Transpiles just fine
b.nomethod(); // Error: Property 'nomethod' does not exist on type 'Object'.
The Object class does not hav...
TypeLoadException says 'no implementation', but it is implemented
I've got a very weird bug on our test machine. The error is:
38 Answers
38
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