arguments

问题 I came across some Fortran 90 code where 68 arguments are passed to a function. Upon searching the web I only found something about a limit of passing 256 bytes for some CUDA Fortran related stuff (http://www.pgroup.com/userforum/viewtopic.php?t=2235&sid=f241ca3fd406ef89d0ba08a361acd962). So I wonder: is there a limit to the number of arguments that may be passed to a function for Intel/Visual/GNU fortran compilers? 回答1: I came across this discussion of the Fortran 90 standards: http://www

问题 Lets say there's a function func() which takes two arguments, a and b . Is there some kind of technique in Python to pass a single list mylist which has both values to the function instead? def myfunc(a, b): return a+b myfunc([1, 2]) If one was completely sure that he was always calling the same function and knew how many arguments it takes, one could do something like this: mylist = [1, 2] a, b = mylist myfunc(a, b) But what if you have lists you need to feed to certain functions, and each

问题 Is there a way to retain the name of a destructured function argument? I.e., the name of the root object? In ES5, I might do this (using inheritance as a metaphor to make the point): // ES5: var setupParentClass5 = function(options) { textEditor.setup(options.rows, options.columns); }; var setupChildClass5 = function(options) { rangeSlider.setup(options.minVal, options.maxVal); setupParentClass5(options); // <= we pass the options object UP }; I'm using the same options object to hold

问题 Is there a way to retain the name of a destructured function argument? I.e., the name of the root object? In ES5, I might do this (using inheritance as a metaphor to make the point): // ES5: var setupParentClass5 = function(options) { textEditor.setup(options.rows, options.columns); }; var setupChildClass5 = function(options) { rangeSlider.setup(options.minVal, options.maxVal); setupParentClass5(options); // <= we pass the options object UP }; I'm using the same options object to hold

问题 My guess is the answer to this question is no, but it would be awesome if there was a way. To clarify, assume I have the following macro: #define MY_VARIADIC_MACRO(X...) // Does some stuff here in the macro definition What I would like to do is somehow perform stringification on all the variables of X before passing it to a variadic function; the keyword here is before. I realize there's no way to really access the individual arguments from within the macro definition, but is there a way to

问题 My guess is the answer to this question is no, but it would be awesome if there was a way. To clarify, assume I have the following macro: #define MY_VARIADIC_MACRO(X...) // Does some stuff here in the macro definition What I would like to do is somehow perform stringification on all the variables of X before passing it to a variadic function; the keyword here is before. I realize there's no way to really access the individual arguments from within the macro definition, but is there a way to

问题 This question already has answers here : Is Python's order of evaluation of function arguments and operands deterministic (+ where is it documented)? (2 answers) Closed 2 years ago . Is it safe to assume that function arguments are evaluated from left to right in Python? Reference states that it happens that way but perhaps there is some way to change this order which may break my code. What I want to do is to add time stamp for function call: l = [] l.append(f(), time.time()) I understand

问题 This is the code ` region<-"ARLINGTON" data<-read.csv("city_markets.csv") for(i in 1:length(data[[1]])){ if(grep(region,as.character(data[[3]][i]),ignore.case=TRUE)==1){ for(j in 1:length(data)){ write(data[[j]][i],"analyzed.txt",append=TRUE) } } } ` now what i'm trying to do here is I'm accessing the csv's column(3rd one) and comparing it with the region specified! i keep getting the error Error in if (grep(region, as.character(data[[3]][i]), ignore.case = TRUE) == : argument is of length

问题 As also explained in the answers of this question, Clojure determines the number of parameters of an anonymous function (defined through #() ), by the maximal parameter index referenced in the body (e.g. if the maximal referenced parameter is %4 , then that anonymous function has 4 parameters). Question: is there some syntax to tell the Clojure compiler that an anonymous function expects one parameter, even not referencing that parameter? Or, in this case, the only "clean way"* is to use the

问题 I have been reading about this theme. I have readed a lot of possible solutions, so please, dont mark my question as duplicated, only need a puntual solution of this problem. I have a function which calculate time of execution of some code. This code will be sent as argument (will be a function). This is the function which calculate the time: double executionTime( /* HERE I WANNA PASS THE FUNCTION TO CALCULATE EXECTIME*/ ) { LARGE_INTEGER frequency; LARGE_INTEGER start; LARGE_INTEGER end;