The chunk vector ceases to exist at the end of the for loop body. It’s still referenced by some thread. That’s called a dangling reference, and it’s not good. The error that you see may however be related to Result. Its definition isn’t provided (at the time of writing this answer) so it’s difficult to say. Remember that as the one … Read more
There is a sorting algorithm in the standard library, in the header <algorithm>. It sorts inplace, so if you do the following, your original word will become sorted. If you don’t want to lose the original, make a copy first.
All of the following examples use Swift 4 Strings got a pretty big overhaul in Swift 4. When you get some substring from a String now, you get a Substring type back rather than a String. Why is this? Strings are value types in Swift. That means if you use one String to make a new one, then … Read more
Modern C++ makes this super simple. C++20 C++20 introduces std::format, which allows you to do exactly that. It uses replacement fields similar to those in python: Code from cppreference.com, CC BY-SA and GFDL Check out the compiler support page to see if it’s available in your standard library implementation. As of 2021-11-28, full support is only available in Visual Studio 2019 16.10, which … Read more
A: The std::string class has a constructor that takes a char const*, so you simply create an instance to do your conversion. B: Instances of std::string have a c_str() member function that returns a char const* that you can use to convert back to char const*.
Break-down: 8 says that you want to show 8 digits 0 that you want to prefix with 0‘s instead of just blank spaces x that you want to print in lower-case hexadecimal. Quick example (thanks to Grijesh Chauhan): Output: Also see http://www.cplusplus.com/reference/cstdio/printf/ for reference.
Use the substring() function with an argument of 1 to get the substring from position 1 (after the first character) to the end of the string (leaving the second argument out defaults to the full length of the string).
Input one number at a time, and check whether the following character is ,. If so, discard it.
The easiest way to for-each every char in a String is to use toCharArray(): This gives you the conciseness of for-each construct, but unfortunately String (which is immutable) must perform a defensive copy to generate the char[] (which is mutable), so there is some cost penalty. From the documentation: [toCharArray() returns] a newly allocated character array whose length is the length of this string and whose contents are … Read more
\n is used for Unix systems (including Linux, and OSX). \r\n is mainly used on Windows. \r is used on really old Macs. PHP_EOL constant is used instead of these characters for portability between platforms.