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Unique combination of all elements from two (or more) vectors
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is someone with more rep than me able to accept this answer?
– Josh
Aug 26 '19 at 20:29
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Which is more efficient: Multiple MySQL tables or one large table?
...s to different people for different part of the data collection, it may be more convenient to split them. (Of course, you can look at defining views and giving authorization on them appropriately).
(c) For moving data to different places, especially during development, it may make sense to use tab...
How to JSON serialize sets?
...ng dict.fromkeys(s) then you lose the ability to recover dictionaries).
A more sophisticated solution is to build-out a custom type that can coexist with other native JSON types. This lets you store nested structures that include lists, sets, dicts, decimals, datetime objects, etc.:
from json imp...
What does .SD stand for in data.table in R
.... There's no significance to the initial ".", except that it makes it even more unlikely that there will be a clash with a user-defined column name.
If this is your data.table:
DT = data.table(x=rep(c("a","b","c"),each=2), y=c(1,3), v=1:6)
setkey(DT, y)
DT
# x y v
# 1: a 1 1
# 2: b 1 3
# 3: c 1...
What exactly is a C pointer if not a memory address?
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What is the purpose of class methods?
...me time? Which way of calling class methods of an object is "better", or "more idiomatic": obj.cls_mthd(...) or type(obj).cls_mthd(...)?
– Alexey
Feb 27 '18 at 12:43
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Using margin:auto to vertically-align a div
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112
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Mock framework vs MS Fakes frameworks
... it appears the other answers have resolved some of that, but here is some more information regarding how they are the same and how they are different. NMock is also similar to RhinoMocks and Moq, so I'm grouping them in with NMock.
There are 3 major differences I see right off between NMock/Rhino...
Should I put input elements inside a label element?
...s valid. I like to use either the first or second example, as it gives you more style control.
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Understanding the meaning of the term and the concept - RAII (Resource Acquisition is Initialization
...rce, one constructor. UTSTTC is just one application of that, RAII is much more.
Resource Management sucks. Here, resource is anything that needs cleanup after use. Studies of projects across many platforms show the majority of bugs are related to resource management - and it's particularly bad on ...