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How to check that an element is in a std::set?
How do you check that an element is in a set?
10 Answers
10
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Java reflection - impact of setAccessible(true)
I'm using some annotations to dynamically set values of fields in classes. Since I want to do this regardless of whether it's public, protected, or private, I am a calling setAccessible(true) on the Field object every time before calling the set() method. My question is what kind of impact does ...
Remove duplicated rows using dplyr
...tinct function for this purpose.
Original answer below:
library(dplyr)
set.seed(123)
df <- data.frame(
x = sample(0:1, 10, replace = T),
y = sample(0:1, 10, replace = T),
z = 1:10
)
One approach would be to group, and then only keep the first row:
df %>% group_by(x, y) %>% filt...
How does one change the language of the command line interface of Git?
...n without changing the language for other programs and couldn’t find the settings.
How to do it?
8 Answers
...
How do I draw a grid onto a plot in Python?
...ge(0, 1, 0.05)
y = numpy.power(x, 2)
fig = plt.figure()
ax = fig.gca()
ax.set_xticks(numpy.arange(0, 1, 0.1))
ax.set_yticks(numpy.arange(0, 1., 0.1))
plt.scatter(x, y)
plt.grid()
plt.show()
ax.xaxis.grid and ax.yaxis.grid can control grid lines properties.
...
Aliases in Windows command prompt
... one may find useful.
@echo off
:: Temporary system path at cmd startup
set PATH=%PATH%;"C:\Program Files\Sublime Text 2\"
:: Add to path by command
DOSKEY add_python26=set PATH=%PATH%;"C:\Python26\"
DOSKEY add_python33=set PATH=%PATH%;"C:\Python33\"
:: Commands
DOSKEY ls=dir /B
DOSKEY sublim...
How to add an Access-Control-Allow-Origin header
...(ttf|otf|eot|woff|woff2)$">
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin "*"
</IfModule>
</FilesMatch>
also in your remote CSS file, the font-face declaration needs the full absolute URL of the font-file (not needed in local CSS files):
e.g.
@font...
UTF-8: General? Bin? Unicode?
..., but less correct.
Here is the difference:
For any Unicode character set, operations performed using the _general_ci collation are faster than those for the _unicode_ci collation. For example, comparisons for the utf8_general_ci collation are faster, but slightly less correct, than comparison...
Why doesn't Dijkstra's algorithm work for negative weight edges?
...stra's algorithm, once a vertex is marked as "closed" (and out of the open set) - the algorithm found the shortest path to it, and will never have to develop this node again - it assumes the path developed to this path is the shortest.
But with negative weights - it might not be true. For example:
...
NerdTree - Reveal file in tree
...
Is there a way to set it to do this whenever the NERDTree is created within that tab?
– Mr Mikkél
Jun 21 '13 at 20:08
1
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