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Use different parameter data types in same function? (C++)


Use different parameter data types in same function? (C++)

By : لزهر جلمي
Date : November 14 2020, 04:48 PM
I wish did fix the issue. just create functions with the same name but with different parameters, this is called function overload, for example:
code :
void print(char *message) { printf("%s", message); }
void print(int val) { printf("%d", val); }
void print(char ch) { printf("%c", ch); }
print("Hello World!");
print(10);
print('P');


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How to cover all possible data types when declaring a function parameter?

How to cover all possible data types when declaring a function parameter?


By : Vijila Chellappan
Date : March 29 2020, 07:55 AM
will help you C++ is a statically typed language. What type a variable is of will be fixed at compile-time and cannot be changed at run-time. What users enter, however, will only be known at run-time, and cannot be known at compile-time. Therefore your question makes no sense.
code :
int i;
std::cin >> i;
if(!std::cin)
  throw "Stupid user blew it!"; // or some real error handling
std::string input;
std::cin >> input;                   // either read up to any whitespace, or 
std::getline(std::cin, input);       // newline, or 
std::getline(std::cin, input, '\t'); // tab, or whatever you want
std::istringstream iss(input);
int i;
iss >> i;
if(!iss)
std::istringstream iss(input);
int i;
iss >> i >> std::ws; // you can chain input
if(!iss.eof())
  throw invalid_input(input);
bool convert_to_int(const std::string& str, int& result)
{
  std::istringstream iss(input);
  iss >> result >> std::ws;
  return iss.eof();
}
template< typename T >
bool convert_from_string(const std::string& str, T& result
{
  std::istringstream iss(input);
  iss >> result >> std::ws;
  return iss.eof();
}
int i;
do {
    read string input
    convert to int i
while(!conversion succeeded);
Function Types as Parameter Types, how change UI element value in this function?

Function Types as Parameter Types, how change UI element value in this function?


By : BBC
Date : March 29 2020, 07:55 AM
this one helps. The data task callback where you parse the JSON is on a background thread. You can't update UI on a background thread. Dispatch to the main thread:
code :
dispatch_async(dispatch_get_main_queue()) {
    doItFunc(results)
}
Advantage of function types as parameter types in swift?

Advantage of function types as parameter types in swift?


By : jinghuaboy
Date : March 29 2020, 07:55 AM
like below fixes the issue If you look at Swift's standard library you will see that many methods do that like map which is defined on Array.
map takes a function which transforms the elements of the array to a new array with a new type.
code :
func map(_ array: [Int], _ transform: Int -> Int) -> [Int] {
    var result = [Int]()
    for element in array {
        result.append(transform(element))
    }
    return result
}

// map can be used with other functions
// and also closures which are functions
// without a name and can be created "on the fly"
func addByOne(i: Int) -> Int {
    return i + 1
}
func square(i: Int) -> Int {
    return i * i
}
map([1,2,3], addByOne) // [2,3,4]
map([1,2,3], square) // [1,4,9]
// and so on...

// with closures
map([1,2,3]) { $0 + 1 } // [2,3,4]
map([1,2,3]) { $0 * $0 } // [1,4,9]
Testing function parameter data types in Jest

Testing function parameter data types in Jest


By : Nisha Priya
Date : March 29 2020, 07:55 AM
I wish this help you I have the following function: , Something like this?:
code :
it('should throw if argument "elementId" is not string or number', () => {
    [{}, true].forEach(elementId => {
        expect(() => {
            getRotation(elementId);
        }).toThrow();
    })
});
Should I use interfaces types for the function along with the parameter and return types?

Should I use interfaces types for the function along with the parameter and return types?


By : peter
Date : March 29 2020, 07:55 AM
wish help you to fix your issue They are redundant because the definition of PositionCallback specifies the types, so TypeScript is guaranteed to infer them for the right-hand side of the assignment.
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