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You have already activated X, but your Gemfile requires Y
...
Using bundle exec is the right way to do this.
Basically what's happening is that you've updated rake to 0.9.2 which now conflicts with the version specified in your Gemfile. Previously the latest version of rake you had matched the version in your Gemfile, so you didn't get any warning wh...
Why is Swift compile time so slow?
... does recompile all your files each time, but the great thing now, is that Apple added real-time compilation feedback over the files it compiles, so Xcode 6 GM now shows which Swift files are being compiled and the status of compilation in real time as you can see in this screenshot:
So this come...
The new syntax “= default” in C++11
...structor suppresses the default constructor.
The destructor default is inappropriate to polymorphic classes, requiring an explicit definition.
Once a default is suppressed, there is no means to resurrect it.
Default implementations are often more efficient than manually specified implementatio...
Real world example about how to use property feature in python?
....lookup("a")
return self._a
a = property(get_a)
This was in a web app where any given page view might only need one particular attribute of this kind, but the underlying objects themselves might have several such attributes - initialising them all on construction would be wasteful, and prop...
400 BAD request HTTP error code meaning?
... such as a 406 (Not Acceptable) or 405 method not allowed. However, 400 is appropriate because "The request could not be understood by the server due to malformed syntax. The client SHOULD NOT repeat the request without modifications."
– Andrew Scott Evans
Oct ...
Background task, progress dialog, orientation change - is there any 100% working solution?
...nCreate().
Here is a sample project demonstrating the technique.
Another approach is to ditch the AsyncTask and move your work into an IntentService. This is particularly useful if the work to be done may be long and should go on regardless of what the user does in terms of activities (e.g., downl...
Action bar navigation modes are deprecated in Android L
...ocumentation for the Toolbar widget:
A standard toolbar for use within application content.
A Toolbar is a generalization of action bars for use within
application layouts. While an action bar is traditionally part of an
Activity's opaque window decor controlled by the framework, a Tool...
Bulk insert with SQLAlchemy ORM
...e in performance on the server side resulting in about 10x more inserts/s. Apparently is bulk-loading using \copy (or COPY on the server) using a packing in communicating from client-to-server a LOT better than using SQL via SQLAlchemy. More info: Large bulk insert performance difference PostgreSQL ...
Can you nest html forms?
...ask another, why not? Why does HTML not allow for nesting forms? To me, it appears to be a limitation that we would be better off without. There are many examples where using nested forms would be easier to program (i.e. using an upload photo form with a profile edit form).
– R...
Is it secure to store passwords as environment variables (rather than as plain text) in config files
I work on a few apps in rails, django (and a little bit of php), and one of the things that I started doing in some of them is storing database and other passwords as environment variables rather than plain text in certain config files (or in settings.py, for django apps).
...