whiletrue

How is Smalltalk's whileTrue message implemented behind the scenes?

I am trying to teach myself Smalltalk. A tutorial has this example of a while loop: |i| i:=5. [i >0] whileTrue:[ Transcript show: ((i*2) asString) ; cr. i:=i-1. ]. As I understand it, whileTrue is a message sent to a BlockClosure, telling the receiving BlockClosure to run the BlockClosure given as the argument as long as the re...

Is there a decent wait function in C++?

One of the first things I learned in C++ was that #include<iostream> int main() { std::cout<<"Hello, World!\n"; return 0; } would simply appear and disappear extremely quickly without pause. To prevent this, I had to go to notepad, and save helloworld.exe pause ase helloworld.bat This go tedious when I needed to create ...