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List comprehension rebinds names even after scope of comprehension. Is this right?
Comprehensions are having some unexpected interactions with scoping. Is this the expected behavior?
6 Answers
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Perl flags -pe, -pi, -p, -w, -d, -i, -t?
I have seen lots of ways of running Perl code or scripts, with different flags. However, when I try to google for what each flag means, I mainly get results to generic Perl sites and no specific information regarding the flags or their use is found there.
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Why does Git tell me “No such remote 'origin'” when I try to push to origin?
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Two problems:
1 - You never told Git to start tracking any file
You write that you ran
git init
git commit -m "first commit"
and that, at that stage, you got
nothing added to commit but untracked files present (use "git add" to track).
Git is telling you that you never...
What is the difference between required and ng-required?
...tion functions. ng-required allows you to set the required attribute depending on a boolean test (for instance, only require field B - say, a student number - if the field A has a certain value - if you selected "student" as a choice)
As an example, <input required> and <input ng-required=...
Can jQuery get all CSS styles associated with an element?
Is there a way in jQuery to get all CSS from an existing element and apply it to another without listing them all?
5 Answer...
How to use > in an xargs command?
I want to find a bash command that will let me grep every file in a directory and write the output of that grep to a separate file. My guess would have been to do something like this
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Django CharField vs TextField
What is the difference between CharField() and TextField() in Django? The documentation says that CharField() should be used for smaller strings and TextField() should be used for larger strings. Okay, but where is the line drawn between "small" and "large"? What's going on under the ho...
TypeError: method() takes 1 positional argument but 2 were given
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In Python, this:
my_object.method("foo")
...is syntactic sugar, which the interpreter translates behind the scenes into:
MyClass.method(my_object, "foo")
...which, as you can see, does indeed have two arguments - it's j...
A field initializer cannot reference the nonstatic field, method, or property
I have a class and when I try to use it in another class I receive the error below.
4 Answers
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Understanding dispatch_async
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The main reason you use the default queue over the main queue is to run tasks in the background.
For instance, if I am downloading a file from the internet and I want to update the user on the progress of the download, I will run...