symbols

问题 In TortoiseMerge document, the equal sign means : A change has been undone by reverting to the original content of the line. The panel shows the differences between Mines or Theirs and base, my questions are : If something is removed, then minus sign can be used. If something is added, then add sign can be used. Why is the equal sign needed? What does the description "the original content of the line" mean? 回答1: Mike's answer is correct. To elaborate a bit, this is an artifact of the way

问题 I have started to take a look at Symbols in JavaScript, and have started to use them in my Objects to help with name clashes, but I can still overwrite properties when using them? I'm having a really hard time to understand what the point of Symbols are in JavaScript. They are spoken about a lot and people say they are brilliant because they don't cause naming conflicts in Objects, but I can't see how? // Create your object let obj = {}; // Create your Symbol let address = Symbol("the address

问题 I'd like to provide a library that provides template code. But I would also like to keep the most possible the ownership of this code (generated code) when I can guess the usage of different usual types of my template. Here is an example of what I am trying to do: lib1.h #include <iostream> template<int N> void print_me() { std::cout << "I am function number " << N << std::endl; } lib1.cpp #include "lib1.h" /* Force symbols to be defined here. */ template void print_me<0>(); template void

问题 There is something I can't understand about Common lisp. Assume I'm writing a macro similar to this: (defmacro test-macro () (let ((result (gensym))) `(let ((,result 1)) (print (incf ,result))))) Than I can do > (test-macro) 2 2 Now I want to see how it expands > (macroexpand-1 '(test-macro)) (LET ((#:G4315 1)) (PRINT (INCF #:G4315))) ; T Ok. There are unique symbols generated with gensym that were printed as uninterned. So as far as I know the uninterned symbols are the symbols for which the

问题 I'm trying to build a program against wxWidgets, and I get a linker error. I'd like to really understand what it means. The error is: /usr/lib/libwx_baseu-2.8.so: undefined reference to `std::ctype<char>::_M_widen_init() const@GLIBCXX_3.4.11' What I don't understand is why the error is at libwx_baseu-2.8.so . I thought that .so files had all its symbols resolved, contrary to .o files that still need linking. When I ldd the .so , I get can resolve all its linked libraries, so there is no

问题 I'm trying to build a program against wxWidgets, and I get a linker error. I'd like to really understand what it means. The error is: /usr/lib/libwx_baseu-2.8.so: undefined reference to `std::ctype<char>::_M_widen_init() const@GLIBCXX_3.4.11' What I don't understand is why the error is at libwx_baseu-2.8.so . I thought that .so files had all its symbols resolved, contrary to .o files that still need linking. When I ldd the .so , I get can resolve all its linked libraries, so there is no

问题 I want to insert the symbol +- (\pm) between x and y in table created in matlab x = (1:1:5)'; y = x*5/100; table = [x y] So, that the output is 1.0000 +/- 0.0500 2.0000 +/- 0.1000 3.0000 +/- 0.1500 4.0000 +/- 0.2000 5.0000 +/- 0.2500 If we can also write the minus exactly below plus. 回答1: You can use unicode characters in MATLAB. The following works: >> fprintf('%f ± %f\n', table.') 1.000000 ± 0.050000 2.000000 ± 0.100000 3.000000 ± 0.150000 4.000000 ± 0.200000 5.000000 ± 0.250000 Note that

问题 I want to insert the symbol +- (\pm) between x and y in table created in matlab x = (1:1:5)'; y = x*5/100; table = [x y] So, that the output is 1.0000 +/- 0.0500 2.0000 +/- 0.1000 3.0000 +/- 0.1500 4.0000 +/- 0.2000 5.0000 +/- 0.2500 If we can also write the minus exactly below plus. 回答1: You can use unicode characters in MATLAB. The following works: >> fprintf('%f ± %f\n', table.') 1.000000 ± 0.050000 2.000000 ± 0.100000 3.000000 ± 0.150000 4.000000 ± 0.200000 5.000000 ± 0.250000 Note that

问题 How to get the currency symbol for a given currency string ("GBP", "USD" etc)? The best I've come up with seems ridiculously long winded, is there another way or am I better off with a lookup table? const userLocale = "EN-gb"; const userCurrency = "GBP"; const withValueEl = document.querySelector(".withValue"); const withoutValueEl = document.querySelector(".withoutValue"); const valueWithCurrency = Number(0).toLocaleString(userLocale, { style: "currency", currency: userCurrency,

问题 I don't know what I did... But that's the only file that have like a Pin Icon . What does it mean, and how can I remove it? Thanks! 回答1: That java file class has a Pin because that class is a final class May be you have declared that class as a final class :) To learn more about: Android studio symbols 回答2: what is that ? It is because you have declared that class as final class due to that it is showing that pin icon. How to remove pin icon ? If you remove final keyword than that icon will