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Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
...00000000040ED948]:
# tracemem[00000000040ED948 -> 00000000040ED830]: .Call copy $<-.data.table $<-
.Internal(inspect(DT))
# @0000000003B7E2A0 19 VECSXP g0c7 [OBJ,NAM(2),TR,ATT] (len=2, tl=100)
# @00000000040C2288 14 REALSXP g0c2 [NAM(2)] (len=2, tl=0) 1,2
# @00000000040C2250 14 REALS...
Is it good practice to make the constructor throw an exception? [duplicate]
...c to the problem you are reporting, and 3) it is reasonable to expect the caller to deal with a checked exception for this2.
However explicitly declaring or throwing java.lang.Exception is almost always bad practice.
You should pick an exception class that matches the exceptional condition that h...
How do I strip all spaces out of a string in PHP? [duplicate]
How can I strip / remove all spaces of a string in PHP?
4 Answers
4
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Why don't structs support inheritance?
...without any knowledge that a derived type is being used.)
So, if this actually happened, we'd have memory corruption issues. Specifically, within Square(), values[1].A*=2 would actually be modifying values[0].B!
Try to debug THAT!
...
EditText, clear focus on touch outside
...ss I could set up OnTouchListener 's on the other views in layout and manually clear the EditText 's focus. But seems too hackish...
...
Is it possible to write data to file using only JavaScript?
... file using JavaScript.
I don't want to print it on console.
I want to Actually Write data to abc.txt .
I read many answered question but every where they are printing on console.
at some place they have given code but its not working.
So please can any one help me How to actually write data to Fil...
How do I ZIP a file in C#, using no 3rd-party APIs?
...file extension to associate the download file with our desktop app. One small problem we ran into was that its not possible to just use a third-party tool like 7-zip to create the zip files because the client side code can't open it -- ZipPackage adds a hidden file describing the content type of ea...
Understanding garbage collection in .NET
... tinker with the source code. Note how the extra braces have no effect at all. And note how setting the variable to null makes no difference at all. It will always print "1". It now works the way you hope and expected it would work.
Which does leave with the task of explaining why it works so d...
bootstrap modal removes scroll bar
...
Thx. Additionally, if modal popup needs to scroll and the parent needs to remain still .modal-body { max-height: calc(100vh - 210px); overflow-y: auto; } .modal-open { overflow: hidden; overflow-y: scroll; padding-ri...
How do I print out the contents of an object in Rails for easy debugging?
...
I generally first try .inspect, if that doesn't give me what I want, I'll switch to .to_yaml.
class User
attr_accessor :name, :age
end
user = User.new
user.name = "John Smith"
user.age = 30
puts user.inspect
#=> #<User:0x...