function

问题 was the idea of nested functions considered to be useless during the time of developing older c++ standard, because its usage is basically covered by another concept like object-oriented programming; or it wasn't implemented just as a matter of simplification? 回答1: Nested functions - to be useful - need the stack frame of the containing function as context. Look at this: class Foo() { void Tripulate() { int i=0; void Dip() { // ... } int x = 12; for(i=1; i<=3; ++i) { int z= 33; Dip(); // ...

问题 was the idea of nested functions considered to be useless during the time of developing older c++ standard, because its usage is basically covered by another concept like object-oriented programming; or it wasn't implemented just as a matter of simplification? 回答1: Nested functions - to be useful - need the stack frame of the containing function as context. Look at this: class Foo() { void Tripulate() { int i=0; void Dip() { // ... } int x = 12; for(i=1; i<=3; ++i) { int z= 33; Dip(); // ...

问题 was the idea of nested functions considered to be useless during the time of developing older c++ standard, because its usage is basically covered by another concept like object-oriented programming; or it wasn't implemented just as a matter of simplification? 回答1: Nested functions - to be useful - need the stack frame of the containing function as context. Look at this: class Foo() { void Tripulate() { int i=0; void Dip() { // ... } int x = 12; for(i=1; i<=3; ++i) { int z= 33; Dip(); // ...

问题 In python, it is possible to define a function taking an arbitrary number of positional arguments like so: def f(*args): print(args) f(1, 2, 3) # (1, 2, 3) When called as f(a, b, c) , all positional arguments are put together into a tuple . This behavior is described in python 2 and 3 documentation, but I haven't found a PEP to it. PEP 3132, introducing extended iterable unpacking ( first, *middle, last = seqence ) states under "Acceptance" that Make the starred target a tuple instead of a

问题 From my understanding, the atan2() function exists in programming languages because atan() itself cannot always determine the correct theta since the output is restricted to -pi/2 to pi/2. If this is the case, then the same problem applies to both asin() and acos() , both of whom also have restricted ranges, so then why are there no asin2() and acos2() functions? 回答1: First off, note that the syntaxes of the two arctan functions are atan(y/x) and atan2(y, x) . This distinction is important,

问题 I have a Python function that is not behaving the way I expect: def xyz(x=1, y=2): print(str(x), str(y)) When I pass in an argument for the second parameter (y), I do not get the output I expect. xyz(, 5) I was hoping the output would be something like: 1 5 But instead, Python produces an error. 回答1: if you have more than one argument with a default value in a function, you should be more specific when you're calling them. for example: def xyz(z, x=1, y=2): # z doesn't have a default value

问题 I have a Python function that is not behaving the way I expect: def xyz(x=1, y=2): print(str(x), str(y)) When I pass in an argument for the second parameter (y), I do not get the output I expect. xyz(, 5) I was hoping the output would be something like: 1 5 But instead, Python produces an error. 回答1: if you have more than one argument with a default value in a function, you should be more specific when you're calling them. for example: def xyz(z, x=1, y=2): # z doesn't have a default value

问题 So here is the question for the problem. Write a function named checkForPlagiarism that takes two arguments: an array of all of the responses for a given person a string of text that represents an external source For each essay question in the listed responses, check whether or not the response value contains the given string. If it does, return true; otherwise, return false. The function is supposed to check the response in the argument with the responses in the responses array. Can't seem

问题 So here is the question for the problem. Write a function named checkForPlagiarism that takes two arguments: an array of all of the responses for a given person a string of text that represents an external source For each essay question in the listed responses, check whether or not the response value contains the given string. If it does, return true; otherwise, return false. The function is supposed to check the response in the argument with the responses in the responses array. Can't seem

问题 So here is the question for the problem. Write a function named checkForPlagiarism that takes two arguments: an array of all of the responses for a given person a string of text that represents an external source For each essay question in the listed responses, check whether or not the response value contains the given string. If it does, return true; otherwise, return false. The function is supposed to check the response in the argument with the responses in the responses array. Can't seem