variadic-functions

问题 I'm struggling to pass a List of Strings into a method requiring the parameter " String... ". Can anybody help me out? // How to put names into dummyMethod? List<String> names = getNames(); public void dummyMethod(String... parameter) { mInnerList.addAll(Arrays.asList(parameter)); } 回答1: You'll have to convert the List<String> to a String array in order to use it in the 'varargs' parameter of dummyMethod . You can use toArray with an extra array as parameter. Otherwise, the method returns an

问题 I'm struggling to pass a List of Strings into a method requiring the parameter " String... ". Can anybody help me out? // How to put names into dummyMethod? List<String> names = getNames(); public void dummyMethod(String... parameter) { mInnerList.addAll(Arrays.asList(parameter)); } 回答1: You'll have to convert the List<String> to a String array in order to use it in the 'varargs' parameter of dummyMethod . You can use toArray with an extra array as parameter. Otherwise, the method returns an

问题 I have compiled this function: void print_ints(int len, ...){ va_list args; va_start(args, len); for(int i =0; i<len ; i++) { int val = va_arg(args,int); printf("i:%i\tval:%i\n",i,val); } va_end(args); } into this assembly: print_ints: pushq %rbp # movq %rsp, %rbp #, subq $224, %rsp #, movl %edi, -212(%rbp) # len, len movq %rsi, -168(%rbp) #, movq %rdx, -160(%rbp) #, movq %rcx, -152(%rbp) #, movq %r8, -144(%rbp) #, movq %r9, -136(%rbp) #, testb %al, %al # je .L7 #, movaps %xmm0, -128(%rbp) #,

问题 I have compiled this function: void print_ints(int len, ...){ va_list args; va_start(args, len); for(int i =0; i<len ; i++) { int val = va_arg(args,int); printf("i:%i\tval:%i\n",i,val); } va_end(args); } into this assembly: print_ints: pushq %rbp # movq %rsp, %rbp #, subq $224, %rsp #, movl %edi, -212(%rbp) # len, len movq %rsi, -168(%rbp) #, movq %rdx, -160(%rbp) #, movq %rcx, -152(%rbp) #, movq %r8, -144(%rbp) #, movq %r9, -136(%rbp) #, testb %al, %al # je .L7 #, movaps %xmm0, -128(%rbp) #,

问题 This question already has answers here : Variable number of arguments in VB (3 answers) Closed 5 years ago . assumed I have a DLL that exports functions with variable arguments list like this: int myfunc(int arg1,...) Here "..." is a undefined number of additional arguments. Can such functions be called out of a Visual Basic application or is VB locked to functions with fixed arguments? I'm just asking to avoid a design problem that would lock-out VB programmers... Thanks! 回答1: In VBA,

问题 This question already has answers here : Variable number of arguments in VB (3 answers) Closed 5 years ago . assumed I have a DLL that exports functions with variable arguments list like this: int myfunc(int arg1,...) Here "..." is a undefined number of additional arguments. Can such functions be called out of a Visual Basic application or is VB locked to functions with fixed arguments? I'm just asking to avoid a design problem that would lock-out VB programmers... Thanks! 回答1: In VBA,

问题 See the code below: // 1st method private static void method(Object o){ System.out.println("object method"); } // 2nd method private static void method(Object... o){ System.out.println("object vararg method"); } public static void main(String [] ar){ method(null); // 1st call Integer value=null; method(value); // 2nd call } I expected 1st call and 2nd call both should invoke 1st method , thought null will prefer to match Object than Object... vararg. But I am wrong. 1st call invoked 2nd

问题 See the code below: // 1st method private static void method(Object o){ System.out.println("object method"); } // 2nd method private static void method(Object... o){ System.out.println("object vararg method"); } public static void main(String [] ar){ method(null); // 1st call Integer value=null; method(value); // 2nd call } I expected 1st call and 2nd call both should invoke 1st method , thought null will prefer to match Object than Object... vararg. But I am wrong. 1st call invoked 2nd

问题 Now I am working on some problems about passing the function as parameter in a function with vararg parameter with generic parameter. The below code works for one function as parameter into other function like that funA(funB(parameter):return1):return2 but when i make function like that funA(vararg funB(parameter):return1):return2 it doesn't works. I have tried somethings like Array or KFunction1 ViewModel fun callMultipleAPI( vararg observable: Observable<Any>):LiveData<Boolean>{ .....

问题 Is it possible to format std::string passing a set of arguments? Currently I am formatting the string this way: string helloString = "Hello %s and %s"; vector<string> tokens; //initialized vector of strings const char* helloStringArr = helloString.c_str(); char output[1000]; sprintf_s(output, 1000, helloStringArr, tokens.at(0).c_str(), tokens.at(1).c_str()); But the size of the vector is determined at runtime. Is there any similar function to sprintf_s which takes a collection of arguments