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sed error: “invalid reference \1 on `s' command's RHS”
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If the -r/--regexp-extended option is not provided, then the capturing parentheses must be escaped.
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How to initialize an array's length in JavaScript?
...cts in the array is user-defined, so I was letting the user pick a number, then initializing the array with that many slots. Then I run a for loop that iterates over the length of the array and fills it. I guess there would be other ways to do this in JavaScript, so the real answer to "Why do I wa...
What is __pycache__?
...mon, as it's the reference implementation) and you don't want that folder, then you can suppress it by starting the interpreter with the -B flag, for example
python -B foo.py
Another option, as noted by tcaswell, is to set the environment variable PYTHONDONTWRITEBYTECODE to any value (according to ...
Why all the Active Record hate? [closed]
...ovide ANY VALUE, except some syntactic sugar for the programmer (which may then use an "object syntax" to access some data, that exists in a relational database). The effort to create some comfort for the programmers should (IMHO...) better be invested in low level database access tools, e.g. some v...
Why can a function modify some arguments as perceived by the caller, but not others?
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OTOH, if you do x += [4] then x is mutated, just like what happens with x.append(4), so the caller will see the change.
– PM 2Ring
Jan 9 '17 at 8:00
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What is the difference between Spring's GA, RC and M2 releases?
...s about the bugs that may still persist.
Usually, its Milestone release, then RC releases and then a GA release.
In an Open Source project, you usually would have a public plan for releases, which can actually give you good ideas about the project's release plans. Like, what quality criteria dete...
Is it possible to adjust x,y position for titleLabel of UIButton?
.../storyboard), setting the "edge" property to title, adjusting it's insets, then setting "edge" property to image, and adjusting accordingly.
It's usually better than coding it , since it's easier to maintain and highly visual.
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How do I remove the Devise route to sign up?
...o this in your model
# typical devise setup in User.rb
devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable
change it to:
devise :database_authenticatable, :recoverable, :rememberable, :trackable, :validatable
notice that the symbol :registerab...
Spring 3 MVC accessing HttpRequest from controller
I would like to handle request and session attributes myself rather then leave it to spring @SessionAttributes , for login of cookies handling for example.
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How do you build a Singleton in Dart?
...that Dart lets you start out (dart out?) using an ordinary constructor and then, if needed, change it to a factory method without changing all the callers.
– Jerry101
May 8 '14 at 22:36
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