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uint8_t can't be printed with cout
...a to unsigned int to output the numeric value, since ostream& operator<<(ostream&, unsigned char) tries to output the visible character value.
uint8_t aa=5;
cout << "value is " << unsigned(aa) << endl;
...
How to style the with only CSS?
How can I style <option> s of a <select> element with cross-browser compatibility? I know many JavaScript ways which customize the dropdown to convert into <li> , which I'm not asking about.
...
How do I cancel form submission in submit button onclick event?
...
You are better off doing...
<form onsubmit="return isValidForm()" />
If isValidForm() returns false, then your form doesn't submit.
You should also probably move your event handler from inline.
document.getElementById('my-form').onsubmit = func...
Validate that a string is a positive integer
...document.getElementById(id);
}
function test(str, expect) {
var result = isNormalInteger(str);
console.log(
str + ": " +
(result ? "Yes" : "No") +
(expect === undefined ? "" : !!expect === !!result ? " <= OK" : " <= ERROR ***")
);
}
gid("btn").addE...
How to read json file into java with simple JSON library
...
Reading from JsonFile
public static ArrayList<Employee> readFromJsonFile(String fileName){
ArrayList<Employee> result = new ArrayList<Employee>();
try{
String text = new String(Files.readAllBytes(Paths.get(fileName)), Standa...
How to concatenate a std::string and an int?
I thought this would be really simple but it's presenting some difficulties. If I have
23 Answers
...
How to find the most recent file in a directory using .NET, and without looping?
...
Shouldn't this use FirstOrDefault() instead of First()? The latter will cause an InvalidOperationException if the directory is empty.
– Tobias J
May 26 '15 at 22:26
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Why is `std::move` named `std::move`?
...erence, and then shows how to write a more efficient std::swap:
template <class T>
void
swap(T& a, T& b)
{
T tmp(static_cast<T&&>(a));
a = static_cast<T&&>(b);
b = static_cast<T&&>(tmp);
}
One has to recall that at this point in ...
What does the question mark in Java generics' type parameter mean?
...cards.
If you declare a method whose signature expect you to pass in List<HasWord>, then the only thing you can pass in is a List<HasWord>.
However, if said signature was List<? extends HasWord> then you could pass in a List<ChildOfHasWord> instead.
Note that there is a su...
How to drop columns by name in a data frame
...hould use either indexing or the subset function. For example :
R> df <- data.frame(x=1:5, y=2:6, z=3:7, u=4:8)
R> df
x y z u
1 1 2 3 4
2 2 3 4 5
3 3 4 5 6
4 4 5 6 7
5 5 6 7 8
Then you can use the which function and the - operator in column indexation :
R> df[ , -which(names(df) %i...