for(;;) { } functionally means while (true) { } It will probably break the loop/ return from loop based on some condition inside the loop body. The reason that for(;;) loops forever is because for has three parts, each of which is optional. The first part initializes the loop; the second decides whether or not … Read more
I prefer the for loop because it also sets the scope of the iterator to just the for loop.
Well, if “exam” in “example”: print “yes!” Is this an improvement? No. You could even add more statements to the body of the if-clause by separating them with a semicolon. I recommend against that though.
My question is how does a for each loop work for an empty list ForEach also works in the same way. If the length is zero then loop is never executed. The only difference between them is use ForEach loop when you want to iterate all the items of the list or array whereas in … Read more
In theory, it is called each time, since a for loop: for(initialization; condition; increment) body; is expanded to something like { initialization; while(condition) { body; increment; } } (notice the curly braces, because initialization is already in an inner scope) In practice, if the compiler understands that a piece of your condition is invariant through … Read more
Use the second parameter forEach accepts instead, which will be the current index you’re iterating over: n = [1,2,3,5,7,8,9,11,12,13,14,16,17,18,20,21,22]; n.forEach((element, index) => { console.log(element, index); }); If you have two separate arrays to begin with, in each iteration, access the [index] property of the other array: var n = [1, 2, 3, 5, 7, 8, … Read more
Take a close look here: for (int i=3, (*p)=0 ; i>=0; i–) In the first part of the for you’re defining a new pointer variable named p which shadows the p defined earlier and initializing it to NULL. You then dereference the NULL pointer in the loop which causes the segfault. You can’t have both … Read more
There is an advantage to using std::for_each instead of an old school for loop (or even the newfangled C++0x range-for loop): you can look at the first word of the statement and you know exactly what the statement does. When you see the for_each, you know that the operation in the lambda is performed exactly … Read more
Try this syntax of for loop in Kotlin is: for (item in collection) { // body of loop } body for (item: Int in ints) { // body of loop } SAMPLE CODE for (i in 0..5) { println(i) // 0,1,2,3,4,5 –> upto 5 } OR for (i in 0 until 5) { println(i) // … Read more