Questions tagged [loops]
A **loop** is a sequence of statements which is specified once but which may be carried out several times in succession.
154
questions
17
votes
6
answers
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Foreach-loop with break/return vs. while-loop with explicit invariant and post-condition
This is the most popular way (it seems to me) of checking if a value is in an array:
for (int x : array)
{
if (x == value)
return true;
}
return false;
However, in a book I’ve ...
- 289
0
votes
3
answers
300
views
Start and exit actions in while loops
Sometimes I find it useful to have loops that do an action at the beginning and/or the end of a while loop.
The best way I can think of for representing this in C++ would be:
if(condition) {
// ...
- 105
13
votes
7
answers
12k
views
Best practice to "continue" from inside a nested loop?
Here is a simplified sample. Basically, it does checks on a string from a string list. If the check passes, it will remove that string (filterStringOut(i);), and it is no longer ...
- 3,613
48
votes
16
answers
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views
Inside a for-loop, should I move the break condition into the condition field if possible? [closed]
Sometimes I need for loops which needs a break like this:
for(int i=0;i<array.length;i++){
//some other code
if(condition){
break;
}
}
I feel uncomfortable with writing
if(...
- 5,712
-1
votes
2
answers
720
views
How do i create a logic for dynamic product list page like below using php and bootstrap?
The big image is catalog or ad blocks that comes from catalog table. And small images are the actual products block that comes from product table.
There may be more products and more catalog. ...
- 7
3
votes
2
answers
542
views
While and do-while loop in the white box method of loop testing
I'm trying to understand how this method works and everywhere I check it I find there's something faulty or maybe it's that I'm not understanding something from the method.
Here there's an ...
- 383
-5
votes
2
answers
229
views
Term for refactoring looping logic for an event loop
Constrained by a main loop outside of my control (eg: UI event loop, game loop, etc...), I have a slow (relative to the main loop's expectations) algorithm involving a loop. Thus, I have to ...
- 9
1
vote
2
answers
2k
views
How to return boolean result from comparison loops to maintain better readability?
Let's consider I have an std::string instance filled with textual data and an std::set<std::string> instance with keywords. I would like to know whether the text stored inside the std::string ...
- 247
2
votes
1
answer
5k
views
Does i in for loops means iteration or index? [duplicate]
Does i in for loops means iteration or index?
How could I know the original meaning? Some programmers say it's iteration, some say it's index.
It seems to me more of an index we start from --- we go ...
1
vote
1
answer
3k
views
What is the benefits of a foreach-loop vs a body-less for-loop
In C# you can use a for-loop without declaring the body, what is the benefit of using this in production-code versus using a foreach loop?
Example
My Examples below use reflection to get the ...
- 143
5
votes
6
answers
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views
How to apply SRP in a loop where two things need to be done?
Is there a way to apply the Single Responsibility Principle to a function where two things need to occur in a loop in order to not need to iterate twice?
For example, suppose I have a function like ...
- 242
6
votes
7
answers
9k
views
While loop without evaluating data twice
I often come across the following pattern.
while(GetValue(i) != null)
{
DoSomethingWith(GetValue(i++));
}
Here GetValue is executed twice. It would be much nicer to use a pattern where we can ...
- 654
0
votes
2
answers
320
views
Permutations for time in JSON
Let's say that I have a JSON file like at example below.
How would I go about finding all possible values of item combination time sums that exist between let's say 00:03:04 to 00:25:55 without ...
- 43
13
votes
2
answers
17k
views
What exactly happens when a thread awaits a task inside a while loop?
After dealing with C#'s async/await pattern for a while now, I suddenly came to realization that I don't really know how to explain what happens in the following code:
async void MyThread()
{
...
- 309
7
votes
1
answer
357
views
Automatic Realtime Cycle Detection of function calls
I am running into a wall mentally when trying to think of a way to solve this problem. At my work we process customer data through some complex reasoning logic. Sometimes this logic will cause ...
- 367