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Checking images for similarity with OpenCV
...size/orientation )
// Compare two images by getting the L2 error (square-root of sum of squared error).
double getSimilarity( const Mat A, const Mat B ) {
if ( A.rows > 0 && A.rows == B.rows && A.cols > 0 && A.cols == B.cols ) {
// Calculate the L2 relative error ...
How to change the session timeout in PHP?
...p_value session.save_path "folderA/sessionsA".
So create a folder to your root server, not into the public_html and not to be publicity accessed from outside. For my cpanel/server worked fine the folder permissions 0700. Give a try...
php code =
Generate a random point within a circle (uniformly)
...p to r = 0. Also, u = 1 shoudl map to r = R. Also, it goes by the square root function, which makes sense and matches the link.
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When to use the different log levels
...ow only warnings and errors may give quick insight into early hints at the root cause of a subsequent error. Warnings should be used sparingly so that they don't become meaningless. For example, loss of network access should be a warning or even an error in a server application, but might be just ...
Why should hash functions use a prime number modulus?
...s again a polynomial of the same degree N (or less). It has no more than N roots (this is here the nature of math shows itself, since this claim is only true for a polynomial over a field => prime number). So if N is much less than P, you are likely not to have a collision. After that, experiment...
How can I use Autolayout to set constraints on my UIScrollview?
...croll.
Add a Scroll View
Add a UIScrollView and pin all four sides to the root view of the view controller.
Add a Content View
Add a UIView as a subview to the scroll view. This is key. Don't try to add lots of subviews to the scroll view. Just add a single UIView. This will be your content view f...
Avoiding if statement inside a for loop?
... In that case, keep in mind that premature optimization is the root of all evil. When programming, always focus on code readability and make sure others understand what you are trying to do. Only consider micro-optimizations and various hacks after profiling your program and identifying ...
Running a Haskell program on the Android OS
...icially run native executables on android. You could probably do it with a rooted phone, thus I assume this means you can not distribute native executables on the app store even when the NDK gcc port can generate native executables just fine. This also probably kills the option for using LLVM unless...
Why call git branch --unset-upstream to fixup?
...ut that this very well might concern the _deploy directory rather than the root of your website.
PS: It might be worth to use a shell such as zsh with a git plugin to not be bitten by this thing in the future. It will immediately show that _deploy concerns a different repository.
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In a storyboard, how do I make a custom cell for use with multiple controllers?
...entifier:
To use it, put a UITableViewCell in a nib. It has to be the only root
object in the nib.
You can register the nib after loading your tableView, then when you
call dequeueReusableCellWithIdentifier: with the cell identifier, it
will pull it from the nib, just like if you had used a Storyboa...