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@Gus Just so you know, I read your comment waaaay back in 2012. Over the course of the 7 years since then, I've always said humorously in my mind "Bang bang! you're boolean!" when inverting a boolean, and I've always remembered how as a result. I decided to look up your comment today and let you know :-) –
27 nov. 2020 · (bang-bang) was what I needed to force eval of the content of the variable; however, I did not get the expected output in my new column. Only the !!as.name gave me the output I was expecting, and I do not fully understand why. Could someone explain why in this case using only !! isn't appropriate and what is happening in !!as.name?
4 nov. 2021 · Its a bang-bang operator used to force early evaluation of part of an expression before it gets fully evaluated. So, its forcing to evaluate that part of the expression before the rest. With more input, I could provide a more detailed answer. answered Nov 4, 2021 at 17:51. Spartacus Rocha.
18 nov. 2020 · I'd like to make a simple function that takes a data frame and user supplied names for two columns in that data frame. The purpose would be to allow this to work easily with dplyr pipes. It will pr...
16 févr. 2017 · AFAIK came from the C# land. With nullable types, C# got its bang too (pun, of course, intended). Yup, the Sir Tony's invention wroke a serious havoc on the world of procedural programming, and we still cleaning the fallout. Being the sweetest person, he still apologizes for it. Curiously, his major contribs to CS are in automatic reasoning ...
The bang bang (!!) command is a shortcut to repeat the previous command you entered in your terminal. This command is very useful when you forget that you need admin rights to make a certain action, and lets you repeat it with super-user rights just by typing. sudo !! instead of typing arrow-up, scrolling to the beginning of the line, adding ...
20 janv. 2018 · Kotlin's double-bang operator is an excellent sample for fans of NullPointerException (NPE). The not-null assertion operator !! converts any value to a non-null type and throws an exception if the value is null. val nonNull = str!!.length. If you write str!!, it'll return a non-null value of str (str is a String? here) or throw an NPE if str is ...
1. In the last paragraph of my question I made the erroneous assumption that one could only prepend an IIFE with a semi-colon. However I realized afterward that I could just as easily prepend a bang function with one. 2. In this case either a bang function OR an IIFE could be used to define a module. 3.
29. Try this: echo 'Text text text!'. or. echo "Text text text"'!'. or. echo -e "Text text text\x21". I'd hesitate to recommend echo -e to someone who's mentioned that they have a reason for using double-quotes, since that suggests that they have some sort of variable they're interpolating or whatnot.
28 août 2015 · I'm trying to correct a bat file that uses bang characters where I would have expected some form of quote: something like. set some_var=!some_var:"=\"! and then later. some command !some_var! It looks like the first is prompting for input with echo disabled, like prompting for a password, and the second referencing the variable.
