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问题 How do I break out a loop? var largest=0 for(i<-999 to 1 by -1) { for (j<-i to 1 by -1) { val product=i*j if (largest>product) // I want to break out here else if(product.toString.equals(product.toString.reverse)) largest=largest max product } } How do I turn nested for loops into tail recursion? From Scala Talk at FOSDEM 2009 http://www.slideshare.net/Odersky/fosdem-2009-1013261 on the 22nd page: Break and continue Scala does not have them. Why? They are a bit imperative; better use many

问题 Given the following code (that doesn\'t work): while True: #snip: print out current state while True: ok = get_input(\"Is this ok? (y/n)\") if ok.lower() == \"y\": break 2 #this doesn\'t work :( if ok.lower() == \"n\": break #do more processing with menus and stuff Is there a way to make this work? Or do I have do one check to break out of the input loop, then another, more limited, check in the outside loop to break out all together if the user is satisfied? 回答1: My first instinct would be

问题 This question already has an answer here: What's the best way to break from nested loops in JavaScript? 15 answers I tried this: for(i = 0; i < 5; i++){ for(j = i + 1; j < 5; j++){ break(2); } alert(1); } only to get: SyntaxError : missing ; before statement So, how would I break a nested loop in JavaScript? 回答1: You should be able to break to a label, like so: function foo () { dance: for(var k = 0; k < 4; k++){ for(var m = 0; m < 4; m++){ if(m == 2){ break dance; } } } } 回答2: You need to

问题 After doing some reseach on how to break through a secondary loop while (true) { // Main Loop for (int I = 0; I < 15; I++) { // Secondary loop // Do Something break; // Break main loop? } } most people recommended to call the \'goto\' function Looking as the following example: while (true) { // Main Loop for (int I = 0; I < 15; I++) { // Secondary Loop // Do Something goto ContinueOn; // Breaks the main loop } } ContinueOn: However; I have often heard that the \'goto\' statement is bad

问题 I am reading serial data and writing to a csv file using a while loop. I want the user to be able to kill the while loop once they feel they have collected enough data. while True: #do a bunch of serial stuff #if the user presses the \'esc\' or \'return\' key: break I have done something like this using opencv, but it doesn\'t seem to be working in this application (and i really don\'t want to import opencv just for this function anyway)... # Listen for ESC or ENTER key c = cv.WaitKey(7) %

问题 I have a situation where there can be long words like \'hellowordsometext\' or integer like \'1234567891122\' without any space in between. check this js please. http://jsfiddle.net/rzq5e/6/ how is it possible to break it in to next line after it reach the div width. what happens now is, it spans out out along with th div <div>Solutionforentprise</div> 回答1: What you need is word-wrap: break-word; , this property will force the non spaced string to break inside the div Demo div { width: 20px;

问题 What\'s the best way to break from nested loops in Javascript? //Write the links to the page. for (var x = 0; x < Args.length; x++) { for (var Heading in Navigation.Headings) { for (var Item in Navigation.Headings[Heading]) { if (Args[x] == Navigation.Headings[Heading][Item].Name) { document.write(\"<a href=\\\"\" + Navigation.Headings[Heading][Item].URL + \"\\\">\" + Navigation.Headings[Heading][Item].Name + \"</a> : \"); break; // <---HERE, I need to break out of two loops. } } } } 回答1:

问题 Is it possible to use the break function to exit several nested for loops? If so, how would you go about doing this? Can you also control how many loops the break exits? 回答1: AFAIK, C++ doesn't support naming loops, like Java and other languages do. You can use a goto, or create a flag value that you use. At the end of each loop check the flag value. If it is set to true, then you can break out of that iteration. 回答2: No, don't spoil it with a break . This is the last remaining stronghold for

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . Is it a bad practice to use break statement inside a for loop ? Say, I am searching for an value in an array. Compare inside a for

问题 Why doesn\'t the compiler automatically put break statements after each code block in the switch? Is it for historical reasons? When would you want multiple code blocks to execute? 回答1: Sometimes it is helpful to have multiple cases associated with the same code block, such as case 'A': case 'B': case 'C': doSomething(); break; case 'D': case 'E': doSomethingElse(); break; etc. Just an example. In my experience, usually it is bad style to "fall through" and have multiple blocks of code