To subscribe to this RSS feed, copy and paste this URL into your RSS reader. will zero all characters Not really. This answer is also lacking any detail. Was Aristarchus the first to propose heliocentrism? How do I replace all occurrences of a string in JavaScript? You can use e.g. To learn more, see our tips on writing great answers. While technically correct I can categorically say I have never seen this method used. What is the difference between #include and #include "filename"? @Lion Liu: Actually I think PHP has exactly as much to offer. We're now at C++14. use, @Kieren Johnstone, if one has no postfix name, why wouldn't use, Yes. How do I iterate over the words of a string? Boolean algebra of the lattice of subspaces of a vector space? Extracting arguments from a list of function calls. std::string.length, or if you like C better, strlen function. Null Versus Empty Strings | C For Dummies Blog Since C-style strings are always terminated with the null character (\0), you can check whether the string is empty by writing. Microsoft makes no warranties, express or implied, with respect to the information provided here. The cursor just jumps down to the next line instead of submitting nothing. Extracting arguments from a list of function calls. which would be completely overkill for such a simple scenario like this. Languages human or computer or otherwise might have different definitions of empty strings and within those same languages, additional context may further change the meaning. Is there a specific case where you're not sure what is the most appropriate? Its declared, allocated 5 elements, but never assigned any values. These days, arguments on topics such as this that are not focused on readability and semantics and focus on absurd micro-optimizations are weak, at best. In application code, this field is most commonly used in assignments to initialize a string variable to an empty string. If the input isn't ASCII, the logic would be (1) encoding-dependent and (2) much more complicated. If you want to zero the entire contents of the string, you can do it this way: memset (buffer,0,strlen (buffer)); but this will only work for zeroing up to the first NULL character. You can't rely on it. Generating points along line with specifying the origin of point generation in QGIS. Passing negative parameters to a wolframscript. Not the answer you're looking for? C arrays: This is because '\0' in C is an integer with value 0, which is a valid null pointer constant. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Where can I find a clear diagram of the SPECK algorithm? If we had a video livestream of a clock being sent to Mars, what would we see? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. https://www.programiz.com/c-programming/c-strings Not the answer you're looking for? Why the obscure but specific description of Jane Doe II in the original complaint for Westenbroek v. Kappa Kappa Gamma Fraternity? What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? Microsoft makes no warranties, express or implied, with respect to the information provided here. How to check whether a string contains a substring in JavaScript? Why are players required to record the moves in World Championship Classical games? Loading a null is arguably marginally cheaper, but could cause null-reference exceptions if you aren't careful about checking the value. Why does Acts not mention the deaths of Peter and Paul? Why refined oil is cheaper than cold press oil? In this demo, i will show you how to create a instagram login page using html and css. C++ Strings - How can I implement this 'IsEmptyOrSpace(string)' method for wstring's? There's a function empty() ready for you in std::string: There are no gotchas. geeksforgeeks.org/why-strcpy-and-strncpy-are-not-safe-to-use, How a top-ranked engineering school reimagined CS curriculum (Ep. most non-ASCII characters are represented in UTF-8 these days, and, @Ben: Your argument, if correct, would apply to most of the C++ standard library's character handling :-( Dealing with UTF-8 and other variable length encodings is much more difficult, because the standard library has a fixed size assumption.