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How to Detect if I'm Compiling Code with a particular Visual Studio version?
...an be found here. Starting recently, Visual Studio will start updating its ranges monotonically, meaning you should check ranges, rather than exact compiler values.
cl.exe /? will give a hint of the used version, e.g.:
c:\program files (x86)\microsoft visual studio 11.0\vc\bin>cl /?
Microsoft (...
Test for equality among all elements of a single vector
... compares the min and the max, after dividing by the mean:
# Determine if range of vector is FP 0.
zero_range <- function(x, tol = .Machine$double.eps ^ 0.5) {
if (length(x) == 1) return(TRUE)
x <- range(x) / mean(x)
isTRUE(all.equal(x[1], x[2], tolerance = tol))
}
If you were using t...
Iterating through a range of dates in Python
...only one iteration:
for single_date in (start_date + timedelta(n) for n in range(day_count)):
print ...
And no list gets stored, only one generator is iterated over. Also the "if" in the generator seems to be unnecessary.
After all, a linear sequence should only require one iterator, not two.
U...
What is the most efficient string concatenation method in python?
...the timeit module. That can tell you which is fastest, instead of random strangers on the internet making guesses.
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What is the best way to concatenate two vectors?
...ation. The boost::join function
http://www.boost.org/doc/libs/1_43_0/libs/range/doc/html/range/reference/utilities/join.html
will give you this.
std::vector<int> v0;
v0.push_back(1);
v0.push_back(2);
v0.push_back(3);
std::vector<int> v1;
v1.push_back(4);
v1.push_back(5);
v1.push_back...
Contains method for a slice
...untime? I haven't found such issues in Go repo on github. That's sad and strange.
– Igor Petrov
May 23 '17 at 6:06
1
...
Does Java SE 8 have Pairs or Tuples?
..., false}
};
System.out.println(
IntStream.range(0, directed_acyclic_graph.length)
.parallel()
.mapToObj(i -> {
long count = IntStream.range(0, directed_acyclic_graph[i].length)
...
Which Boost features overlap with C++11?
...
Replaceable by C++11 language features or libraries
Foreach → range-based for
Functional/Forward → Perfect forwarding (with rvalue references, variadic templates and std::forward)
In Place Factory, Typed In Place Factory → Perfect forwarding (at least for the documented use cases)
L...
Why does int i = 1024 * 1024 * 1024 * 1024 compile without error?
...compile-error since the right hand side still is an int-literal and out of range.
So operations with int-values (and that's including assignments) may overflow without a compile-error (and without a runtime-error as well), but the compiler just can't handle those too-large literals.
...
What is the most efficient way to loop through dataframes with pandas? [duplicate]
...hich one of the three is the least time consuming.
t = pd.DataFrame({'a': range(0, 10000), 'b': range(10000, 20000)})
B = []
C = []
A = time.time()
for i,r in t.iterrows():
C.append((r['a'], r['b']))
B.append(time.time()-A)
C = []
A = time.time()
for ir in t.itertuples():
C.append((ir[1], ...