You can write: while IFS= read -r line do echo “$line” done <<< “$the_list” See ยง3.6.7 “Here Strings” in the Bash Reference Manual. (I’ve also taken the liberty of adding some double-quotes, and adding -r and IFS= to read, to avoid too much mucking around with the contents of your variables.)
This can be reliably reproduced (or not reproduced, depending on what you want) with openjdk version “1.8.0_222” (used in my analysis), OpenJDK 12.0.1 (according to Oleksandr Pyrohov) and OpenJDK 13 (according to Carlos Heuberger). I ran the code with -XX:+PrintCompilation enough times to get both behaviours and here are the differences. Buggy implementation (displays output): … Read more
You can try wrapping that code in a try/except block, because keyboard interrupts are just exceptions: try: while True: IDs2=UpdatePoints(value,IDs2) time.sleep(10) except KeyboardInterrupt: print(‘interrupted!’) Then you can exit the loop with CTRL-C.
Please note that all valid statements of the language do not have to serve a purpose. They are valid per the grammar of the language. One can build many similar “useless” statements, such as if (1);. I see such statements as the conjunction of a conditional (if, while, etc.) and the empty statement ; (which … Read more
Is it the correct way to use while loops with asynchronous conditions? Yes. async functions simply suspend their execution on every await until the respective promises fulfills, and any control structures continue to work as before.
String#each_line str.each_line do |line| #do something with line end
You can use the MediaPlayer class and add a Completion listener to be activated when the sound finishes playing MediaPlayer mp = MediaPlayer.create(this,Uri.parse(“android.resource://emad.app/raw/seven_chimes”)); mp.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { performOnEnd(); } }); mp.start();
but on the other hand it creates a completely useless list of integers just to loop over them. Isn’t it a waste of memory, especially as far as big numbers of iterations are concerned? That is what xrange(n) is for. It avoids creating a list of numbers, and instead just provides an iterator object. In … Read more
An example in JavaScript Here’s an example using JavaScript. Currently, most browsers do not support tail call optimisation and therefore the following snippet will fail const repeat = n => f => x => n === 0 ? x : repeat (n – 1) (f) (f(x)) console.log(repeat(1e3) (x => x + 1) (0)) // 1000 … Read more
set /a countfiles-=%countfiles% This will set countfiles to 0. I think you want to decrease it by 1, so use this instead: set /a countfiles-=1 I’m not sure if the for loop will work, better try something like this: :loop cscript /nologo c:\deletefile.vbs %BACKUPDIR% set /a countfiles-=1 if %countfiles% GTR 21 goto loop