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Why do some C# lambda expressions compile to static methods?
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This is most likely because there are no closures, for example:
int age = 25;
Action<strin...
What does “O(1) access time” mean?
I have seen this term "O(1) access time" used to mean "quickly" but I don't understand what it means. The other term that I see with it in the same context is "O(n) access time". Could someone please explain in a simple way what these terms mean?
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Is there a valid reason for enforcing a maximum width of 80 characters in a code file, this day and
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What exactly is a C pointer if not a memory address?
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The C standard does not define what a pointer is internally and how it works internally. This ...
Android Studio Stuck at Gradle Download on create new project
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How to add a new row to an empty numpy array
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Then be sure to append along axis 0:
arr = np.append(arr, np.array([[1,2,3]]), axis=0)
arr = np.append(arr, np.array([[4,5,6]]), axis=0)
But, @jonrsharpe is right. In fact, if you're going to be appending in a loop, it would be much faster to append to a list as in your first example, then ...
Does pandas iterrows have performance issues?
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Generally, iterrows should only be used in very, very specific cases. This is the general orde...
Rotating x axis labels in R for barplot
...xaxt="n")
labs <- paste(names(table(mtcars$cyl)), "cylinders")
text(cex=1, x=x-.25, y=-1.25, labs, xpd=TRUE, srt=45)
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AWK: Access captured group from line pattern
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That was a stroll down memory lane...
I replaced awk by perl a long time ago.
Apparently the...