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OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
... OpenCV is pretty much the same for all platforms (Win/Linux/Mac/iPhone/...). The difference is that some don't supported the GPU module of OpenCV. Have you built OpenCV for iOS already? Were you able to test it? I think these are the questions you need to answer before trying anything more a...
Long press gesture on UICollectionViewCell
...path");
} else {
// get the cell at indexPath (the one you long pressed)
UICollectionViewCell* cell =
[self.collectionView cellForItemAtIndexPath:indexPath];
// do stuff with the cell
}
}
Swift
class Some {
@objc func handleLongPress(gestur...
How to check if an object is an array?
...ing. If it's a string, then I want to convert it to an array with just the one item so I can loop over it without fear of an error.
...
How to get past the login page with Wget?
...Based on the manual page:
# Log in to the server. This only needs to be done once.
wget --save-cookies cookies.txt \
--keep-session-cookies \
--post-data 'user=foo&password=bar' \
--delete-after \
http://server.com/auth.php
# Now grab the page or pages we care about.
wget ...
Running a cron every 30 seconds
... not go down to sub-minute resolutions, you will need to find another way.
One possibility, though it's a bit of a kludge(a), is to have two jobs, one offset by 30 seconds:
# Need these to run on 30-sec boundaries, keep commands in sync.
* * * * * /path/to/executable param1 param2
* * *...
Windows API Code Pack: Where is it? [closed]
...
I can't answer the question of why, nor do I wish to speculate (maybe someone else closer to the issue can tell us what happened), but thankfully it's not completely gone. It looks like the binaries have been reuploaded to NuGet by other developers, although note that none of the packages are offic...
Is it possible to change icons in Visual Studio 2012?
... there any way to replace VS2012 solution explorer's icons with VS2010 ones? At least 'folder' icon :(
4 Answers
...
In Python, what is the difference between “.append()” and “+= []”?
..., 's = []').timeit()
0.44208112500000141
In general case append will add one item to the list, while += will copy all elements of right-hand-side list into the left-hand-side list.
Update: perf analysis
Comparing bytecodes we can assume that append version wastes cycles in LOAD_ATTR + CALL_FUNCT...
Add regression line equation and R^2 on graph
...
Here is one solution
# GET EQUATION AND R-SQUARED AS STRING
# SOURCE: https://groups.google.com/forum/#!topic/ggplot2/1TgH-kG5XMA
lm_eqn <- function(df){
m <- lm(y ~ x, df);
eq <- substitute(italic(y) == a + b %.% ...
TDD vs. Unit testing [closed]
...was not creating any unit tests before. This feels like a nice stepping stone to full TDD.
– Walter
Nov 16 '09 at 17:01
...