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Integrate ZXing in Android Studio
...tor.ONE_D_CODE_TYPES);
integrator.setPrompt("Scan a barcode");
integrator.setCameraId(0); // Use a specific camera of the device
integrator.setBeepEnabled(false);
integrator.setBarcodeImageEnabled(true);
integrator.initiateScan();
They have a sample-project and are providing several integration e...
What is the difference between \r and \n?
...er machines used just a "\r". (Commodore, Apple II, Mac OS prior to OS X, etc..)
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I need to pop up and trash away a “middle” commit in my master branch. How can I do it?
...ow you a list of all the commits back to that point. You can pick, squash, etc. In this case remove the line for the commit you want to erase and save the file. Rebase will finish its work.
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Why is my git repository so big?
... instead of just branchname). So I went a step further and executed some sketchy surgery--I deleted the .git/objects directory from the original, and put in the one from the clone. That did the trick, leaving all of the original branches, refs, etc intact, and everything seems to work (crossing fing...
Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...has transactional DDL for most database objects (certainly tables, indices etc but not databases, users). However practically any DDL will get an ACCESS EXCLUSIVE lock on the target object, making it completely inaccessible until the DDL transaction finishes. Also, not all situations are quite handl...
Depend on a branch or tag using a git URL in a package.json?
....json. If I changed the token or any letter in the repo name or user name, etc. - I'd get an error. So I knew I had the right token and repo name.
I finally realized it's because the name of the dependency I had in my package.json didn't match the name in the package.json of the repo I was trying t...
Difference between Destroy and Delete
...t determines what it should do for dependencies, runs through validations, etc.
When you invoke delete or delete_all on an object, ActiveRecord merely tries to run the DELETE FROM tablename WHERE conditions query against the db, performing no other ActiveRecord-level tasks.
...
“From View Controller” disappears using UIViewControllerContextTransitioning
...r *)viewControllerForKey:(NSString *)key;
So instead of adjusting frames etc of toViewController.view, use the return value of [transitionContext viewForKey:UITransitionContextToViewKey].
If your app needs to support iOS7 and/or Xcode 5, then you can use a simple category method on UIViewControll...
How to align checkboxes and their labels consistently cross-browsers
...
Sometimes vertical-align needs two inline (span, label, input, etc...) elements next to each other to work properly. The following checkboxes are properly vertically centered in IE, Safari, FF, and Chrome, even if the text size is very small or large.
They all float next to each other o...
How to implement the factory method pattern in C++ correctly
...dwich spam();
// Move constructor.
sandwich(sandwich &&);
// etc.
};
Then you can construct objects on the stack:
sandwich mine{sandwich::ham()};
As subobjects of other things:
auto lunch = std::make_pair(sandwich::spam(), apple{});
Or dynamically allocated:
auto ptr = std::ma...