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How to delete migration files in Rails 3
...s not the last one), I just perform a new rake db:migrate again.
If your application is already on production or staging, it's safer to just write another migration that destroys your table or columns.
Another great reference for migrations is: http://guides.rubyonrails.org/migrations.html
...
What is the overhead of creating a new HttpClient per call in a WebAPI client?
...e ability to add HttpMessageHandlers into the request/response pipeline to apply cross cutting concerns. These could be for logging, auditing, throttling, redirect handling, offline handling, capturing metrics. All sorts of different things. If a new HttpClient is created on each request, then al...
How to turn on front flash light programmatically in Android?
...
If so then Turn Off/On
If not then you can do whatever, according to your app
needs.
For Checking availability of flash in the device:
You can use the following:
context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
which will return true if a flash is available...
Strip spaces/tabs/newlines - python
... If sep is not specified or is None, a different splitting algorithm is
applied: runs of consecutive whitespace are regarded as a single
separator, and the result will contain no empty strings at the start
or end if the string has leading or trailing whitespace.
Demo:
>>> myString...
What does MVW stand for?
...ts apis by making it easier to create a mental model
that represents the application that is being built with the
framework. It can also help to establish terminology that is used by
developers.
Having said, I'd rather see developers build kick-ass apps that are
well-designed and follow...
What is the best place for storing uploaded images, SQL database or disk file system? [closed]
I'm writing an application that allows users to upload images onto the server. I expect about 20 images per day all jpeg and probably not edited/resized. (This is another question, how to resize the images on the server side before storing. Maybe someone can please drop a .NET resource for that in t...
C# - How to get Program Files (x86) on Windows 64 bit
... that the ProgramFiles(x86) environment variable is only available if your application is running 64-bit.
If your application is running 32-bit, you can just use the ProgramFiles environment variable whose value will actually be "Program Files (x86)".
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How can I find and run the keytool
...2\bin and next 2) keytool -list -v -keystore "C:\AndroidProjects\Project1\app\myapp.keystore"
– Andrew Grow
May 4 '18 at 9:59
2
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Running multiple AsyncTasks at the same time — not possible?
...COMB, it is planned to change this back to a single thread to avoid common application errors caused by parallel execution. If you truly want parallel execution, you can use the executeOnExecutor(Executor, Params...) version of this method with THREAD_POOL_EXECUTOR; however, see commentary there for...
When should you NOT use a Rules Engine? [closed]
...g., on the order of thousands of rules in a single rule set). This often happens when the rules engine is a singleton sitting in the center of the enterprise in the hope that keeping rules DRY will make them accessible to many apps that require them. I would defy anyone to tell me that a Rete rule...