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Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...ouldn't assume that blindly). So what does feature? Running GProf on your ostringstream code compiled with GCC gives the following breakdown:
44.23% in std::basic_streambuf<char>::xsputn(char const*, int)
34.62% in std::ostream::write(char const*, int)
12.50% in main
6.73% in std::ostream::s...
Find the nth occurrence of substring in a string
...tive approach would be the usual way, I think.
Here's an alternative with string-splitting, which can often be useful for finding-related processes:
def findnth(haystack, needle, n):
parts= haystack.split(needle, n+1)
if len(parts)<=n+1:
return -1
return len(haystack)-len(pa...
How to parse a string to an int in C++?
What's the C++ way of parsing a string (given as char *) into an int? Robust and clear error handling is a plus (instead of returning zero ).
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Number of occurrences of a character in a string [duplicate]
...ber of occurrences of a certain character such as & in the following string.
6 Answers
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std::cin input with spaces?
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It doesn't "fail"; it just stops reading. It sees a lexical token as a "string".
Use std::getline:
int main()
{
std::string name, title;
std::cout << "Enter your name: ";
std::getline(std::cin, name);
std::cout << "Enter your favourite movie: ";
std::getline(std::ci...
Getting the first character of a string with $str[0]
I want to get the first letter of a string and I've noticed that $str[0] works great. I am just not sure whether this is 'good practice', as that notation is generally used with arrays. This feature doesn't seem to be very well documented so I'm turning to you guys to tell me if it's all right –...
How to import CSV file data into a PostgreSQL table?
...col1': sqlalchemy.types.NUMERIC,
'col2': sqlalchemy.types.String}) #Datatypes should be [sqlalchemy types][1]
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How to convert a String into an ArrayList?
In my String, I can have an arbitrary number of words which are comma separated. I wanted each word added into an ArrayList. E.g.:
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How can I strip all punctuation from a string in JavaScript using regex?
If I have a string with any type of non-alphanumeric character in it:
13 Answers
13
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How do I print to the debug output window in a Win32 app?
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You can use OutputDebugString. OutputDebugString is a macro that depending on your build options either maps to OutputDebugStringA(char const*) or OutputDebugStringW(wchar_t const*). In the later case you will have to supply a wide character string...