control-flow

Possible Duplicate: Why is this code giving an “Unreachable Statement” error? This seems very easy question, I found this question in one book. If anyone help me to figure out why I'm getting error. do { System.out.print("inside do"); } while (false); while (false) { // error System.out.print("inside while"); } System.out.print("outside"); I thought, and according to me, output should be inside dooutside . But, it is showing Compiler Error : Unreachable Statement . Then, I tried to figure out, why, it is showing Compilation error : Unreachable Statement* . So, I change the above code like this

There is an interesting post over here about this, in relation to cross-application flow of control. Well, recently, I've come across an interesting problem. Generating the nth value in a potentially (practically) endless recursive sequence. This particular algorithm WILL be in atleast 10-15 stack references deep at the point that it succeeds. My first thought was to throw a SuccessException that looked something like this (C#): class SuccessException : Exception { public string Value { get; set; } public SuccessException(string value) : base() { Value = value; } } Then do something like this:

According to the F# spec (see §6.5.7 ), simple for loops are bounded by integer ( int aka int32 aka System.Int32 ) limits start and stop , e.g. for i = start to stop do // do sth. I wonder why the iteration bounds for this type of for loop are required to be int32 . Why not allow uint32 ? int64 ? bigint ? I'm aware that sequence iteration expressions ( for ... in ... ) can iterate over arbitrary sequences; that however requires allocating an iterator and calling MoveNext and Current and what not and can thus be considerably less efficient than a plain loop could be (increment counter, compare,

I am trying to solve a quiz using R, but my code does not work properly. I tried debugging, but it seems that the ifelse statement fails to work at certain numbers that seem pretty random. Here is the quiz: http://puzzles.nigelcoldwell.co.uk/six.htm switches <- rep("off", 100) for(i in 1:100){ k <- c(seq(i, 100, i)) ifelse(switches[k] == "off", switches[k] <- "on", switches[k] <- "off") } When I run this code, I get "on" for 14, 22, 26, 30, 34, etc in which I should have got "off." Is there a mistake in the way I applied ifelse statement to a vector with vectorized index? The ifelse syntax

I am trying to find way to break / exit from FOR loop, if there are any error occured. Below is content of batch file. @echo on set myfile=D:\sample.txt FOR /F "tokens=1,2 delims=," %%i in (%myfile%) do call :process "%%i" :process set recfile=%1% echo %recfile% echo "Step in Test1" echo %errorlevel% pause; exit /B 0 If %errorlevel% NEQ 0 goto :fail1 :fail1 echo "Step in fail1" pause; exit /B 9993 :EOF Sample.txt has multiple records. If there are any error occured then I am expecting to exit the batch file rather then checking the complete sample.txt file. e.g. on statement echo %recfile%, If