tostring

What's the purpose of boost::to_string (found in boost/exception/to_string.hpp ) and how does it differ from boost::lexical_cast<std::string> and std::to_string ? std::to_string , available since C++11, works on fundamental numeric types specifically. It also has a std::to_wstring variant. It is designed to produce the same results that sprintf would. You may choose this form to avoid dependencies on external libraries/headers. The throw-on-failure function boost::lexical_cast<std::string> and its non-throwing cousin boost::conversion::try_lexical_convert work on any type that can be inserted

int a = 10000000; a.ToString(); How do I make the output? 10,000,000 Try N0 for no decimal part: string formatted = a.ToString("N0"); // 10,000,000 You can also do String.Format: int x = 100000; string y = string.Empty; y = string.Format("{0:#,##0.##}", x); //Will output: 100,000 If you have decimal, the same code will output 2 decimal places: double x = 100000.2333; string y = string.Empty; y = string.Format("{0:#,##0.##}", x); //Will output: 100,000.23 To make comma instead of decimal use this: double x = 100000.2333; string y = string.Empty; y = string.Format(System.Globalization

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Can anyone explain this: public class Test : List <int> { public override string ToString () { return "My ToString" ; } } If I instantiate this and add it to a ListBox control on a Windows Form , it displays "Collection" rather than "My ToString". Test test = new Test (); listBox1 . Items . Add ( test ); I thought the add to Items would just call my class's ToString() . The following works as expected of course MessageBox . Show ( test . ToString ()); 回答1: For that to work you have to disable formatting: listBox1 .

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Basically, what I'm trying to do, is get the item ID, and set a price from a ini, basically like: itemid:price but, i cannot simply do item.getId().toString(). I'm trying to get item What can I do to make it a string? public static void getBuyPrice(Item item) { try { String itemId = item.getId().toString(); BufferedReader br = new BufferedReader(new FileReader(new File( "./data/prices.ini"))); String line; while ((line = br.readLine()) != null) { if (line.equals(itemId)) { String[] split = line.split(":"); item.getDefinitions().setValue

Is anyone aware of a library that uses the the techniques (annotations and classworking) described in this article for automatically generating the standard Object methods toString(), equals() and hashcode() for standard java classes? Yes, project Lombok does this. See http://projectlombok.org . It not only supports javac, but also Eclipse. So the methods are not in the source code, but are displayed in the outline view. I certainly haven't seen this and I'm not really sure what value would be gained from it. I find that automatic toString generation is not usually what you want when scouring

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have also tried shielding the '/' symbol in the formatting string, but it didn't quite work. My final goal is to get the date with the '/' symbols as separators. I guess I can use DateTime.ToString(“dd/MM/yyyy”).Replace('.', '/') , but that feels a bit excessive. 回答1: The / character in date/time format strings stands for "whatever the date separator of the format provider is". Since you do not supply a format provider Thread.CurrentCulture is used, and in your case the current culture uses . as the date separator. If you want to