break

问题 Very simple example code (only for demonstration, no use at all): repeat { while (1 > 0) { for (i in seq(1, 100)) { break # usually tied to a condition } break } break } print("finished") I want to break out from multiple loops without using break in each loop separately. According to a similar question regarding python, wrapping my loops into a function seems to be a possible solution, i.e. using return() to break out of every loop in the function: nestedLoop <- function() { repeat { while

问题 Consider the following code just as an example : This one works i = 0 flag = false while i < 10 flag = true if flag i+=1 else break end end But when turn If part into ternary operator like this i = 0 flag = false while i < 10 flag = true if flag ? i+=1 : break end I get this errors: ternary.rb:5: void value expression ternary.rb:6: syntax error, unexpected end-of-input, expecting keyword_end I know this code lacks of logic, but the current example is the best what I came up with to show you

问题 I have a recursive function like below. public function findnodeintree($cats,$cat_id) { foreach($cats as $node) { if((int)$node['id'] == $cat_id) { echo "finded"; $finded = $node; break; } else { if(is_array($node) && array_key_exists('children', $node)){ $this->findnodeintree($node['children'],$cat_id); } } } return $finded; } For Example $node =$this->findnodeintree($category_Array, 169); It gaves me "founded" A PHP Error was encountered Severity: Notice Message: Undefined variable: finded

问题 I want to break a loop in a situation like this: import Data.Maybe (fromJust, isJust, Maybe(Just)) tryCombination :: Int -> Int -> Maybe String tryCombination x y | x * y == 20 = Just "Okay" | otherwise = Nothing result :: [String] result = map (fromJust) $ filter (isJust) [tryCombination x y | x <- [1..5], y <- [1..5]] main = putStrLn $ unlines $result Imagine, that "tryCombination" is a lot more complicated like in this example. And it's consuming a lot of cpu power. And it's not a

问题 I am trying to find and replace line breaks in text using javascript. The following works. It replaces the character a with the character z. var text = "aasdfasdf"; text= text.replace(/a/g,"z"); alert(text); The following based on other posts on this and other message boards does not. Basically the javascript does not fire: var text = "aasdfasdf"; text= text.replace(/\n/g,"z"); alert(text); ...Here is one of many posts that suggests it should work. JavaScript: How to add line breaks to an

问题 I want to run the keep command in a do-file in Stata 12: keep a1 a2 a3 a4 a5 b1 b2 b3 b4 b5 c1 c2 c3 c4 What I want is to do the following: keep {a1 a2 a3 a4 a5 b1 b2 b3 b4 b5 c1 c2 c3 c4} I know the {} brackets don't do the trick but I'm looking for the command that does it. Using #delimiter ; does not work either. I want to do this because subgroups of variables have a relation among themselves (which I intended to signal above by using a , b and c ) and I want to have that clear in my code

问题 When to use break, and continue in C language? Can I use them both with loop, and without loop? If a condition in a loop is enough to instruct whether to continue or not continue then what are the needs use them? Is it a good practice to use them? Thanks in advance. 回答1: Break,as the name suggests will break the execution of current loop once and for all while Continue will skip the execution of following statements and start new iteration. It is known that loop may have it's termination

问题 Suppose I have a piece of Perl code like: foreach my $x (@x) { foreach my $y (@z) { foreach my $z (@z) { if (something()) { # I want to break free! } # do stuff } # do stuff } # do stuff } If something() is true, I would like to break ('last') all the loops. how can I do that? I thought of two options, both of which I don't like: Using something GOTO Adding a boolean variable which will mark something() is true, check this var in each of the loops before they resume and last() if it's true.

问题 When this variable becomes a certain amount i want the loop to stop, but i keep getting the error, "Uncaught SyntaxError: Illegal break statement". function loop() { if (isPlaying) { jet1.draw(); drawAllEnemies(); requestAnimFrame(loop); if (game==1) { break; } } } 回答1: break is to break out of a loop like for, while, switch etc which you don't have here, you need to use return to break the execution flow of the current function and return to the caller. function loop() { if (isPlaying) {

问题 I'm trying to search a word from the text that I extract from the pdf file which is OCR'd format. This pdf file has multiple pages, so for each page, I'm searching that word, if that word is found then write the filename , status (Present or Not Present), Page on which it is found and what words it has found to a dataframe . But the dataframe is giving the status "Present" for all files, I just want like this file_name Status Page words test1.pdf "Present" test1_2,test1_4 gym,school test2.pdf