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Why does Pycharm's inspector complain about “d = {}”?
...ing code to your dictionary declaration?
I think pycharm will trigger the error if you have something like:
dic = {}
dic['aaa'] = 5
as you could have written
dic = {'aaa': 5}
BTW: The fact that the error goes away if you use the function doesn't necessarily mean that pycharm believes dict() i...
Why does C++11's lambda require “mutable” keyword for capture-by-value, by default?
... // OK
unnamed2 u2(n); u2(); // OK
//unnamed3 u3(n); u3(); // Error
std::cout << n << "\n"; // "10"
}
So you could think of lambdas as generating a class with operator() that defaults to const unless you say that it is mutable.
You can also think of all the variables...
What is the difference between i++ and ++i?
...ested in my previous articles on the subject:
https://ericlippert.com/2008/05/23/precedence-vs-associativity-vs-order/
and
https://ericlippert.com/2007/08/14/c-and-the-pit-of-despair/
and an interesting case where C makes it hard to reason about correctness:
https://docs.microsoft.com/archive/blogs/...
How do I set up email confirmation with Devise?
...evise no longer provides migration helpers, and so t.confirmable raises an error. Instead, copy the block labeled "Confirmable" from their migration guide.
3. Generate the devise views, with either of the following commands,so you can override the devise mailer views:
rails generate devise:views #...
Why does ++[[]][+[]]+[+[]] return the string “10”?
... sure how this is possible. ++[[]][0] returns indeed 1, but ++[] throws an error. This is remarkable because it looks like ++[[]][0] does boil down to ++[]. Do you perhaps have any idea why ++[] throws an error whereas ++[[]][0] does not?
– pimvdb
Sep 9 '11 at ...
Trying to fix line-endings with git filter-branch, but having no luck
... while read file; do fromdos $file; done
I'm not totally sure about your error messages. I successfully tested this method. What program is producing each? What files/directories do you not have permissions for? However, here's a stab at guessing what your it might be:
One easy way to get a 'file...
What is null in Java?
...ow borderline subjective. Some people say that null causes many programmer errors that could've been avoided. Some say that in a language that catches NullPointerException like Java, it's good to use it because you will fail-fast on programmer errors. Some people avoid null by using Null object patt...
How do you give iframe 100% height [duplicate]
...d on Chrome 30. Haven't tested on other browsers though. I came across the error on Firefox because the page I was testing had very little content... It could be it's my meager markup or the CSS reset altering the output, but if I experienced this error I guess the accepted answer doesn't work in ev...
Web deployment task build failed
... TFS. When I tried to manually import the website I got a more informative error: "not able to log on the user \WDeployConfigWriter".
Turns out that when you install web deploy it sets up two local accounts WDeployConfigWriter and WDeployAdmin. The passwords on these accounts are set to expire. So ...
What are forward declarations in C++?
...o a Car, but Car.h can't be included here as it would result in a compiler error. If Car.h was included, that would then try to include Wheel.h which would include Car.h which would include Wheel.h and this would go on forever, so instead the compiler raises an error. The solution is to forward decl...