All Questions
Tagged with loops coding-style
14 questions
1
vote
1
answer
200
views
Should I separate special cases from for loop deliberately, or let a for loop handles special cases naturally?
Suppose I need to find the last selected index of options according to last selected contents, eg: options : A,B,C,D,E ,last selected option: C, so the last selected index is 2.
There is a special ...
- 2,659
-5
votes
1
answer
1k
views
How do I manage multiple nested for-loops without using multiple variables?
If I have code that looks like this:
int i;
void functionA (){
for (i=0; i<10; i++){
functionB();
}
}
void functionB (){
for (i=0; i<20; i++){
doSomething();
}
}
...
- 107
4
votes
2
answers
511
views
How to avoid duplication in a for loop when "initialization step" is identical to "update step"?
I often find a situation where I need to write duplicate codes in a for loop, where the "init step" to identical to the "update step":
// duplicate `next()`
for (let x = next(); p(x); x = next()) {
...
- 266
4
votes
5
answers
747
views
Is copy and paste the head of for-loop (e.g.:for(let i=0;i<something.length;i++)) violating DRY principle?
For example, in my project, I often found some head of for-loop appears many times, eg:
for(let i=0;i<SharedData.students.length;i++){
SharedData.students[i].something=.....
}
if(isReset){
...
- 5,722
2
votes
2
answers
181
views
Should special case be inside or outside the for loop here?
For example, suppose I have 2 arrays:
let arr1=[5,2,1];
let arr2=["abcde","ab","a"];
my work is simple : to check if length of strings in arr2 are larger than corresponding element with same index ...
- 5,722
3
votes
2
answers
126
views
Should I move tasks which is just for a specific element only out of for loop?
For example, I have a for loop, which element 0 has additional function to run compared with other elements, my question is, should the additional function be:
1.place inside for loop
for(int i=0;i&...
- 5,722
17
votes
6
answers
8k
views
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
48
votes
16
answers
16k
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(...
- 5,722
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
4
votes
2
answers
703
views
Common loop variable names for indexes in 4D and above
I am curious if there are common loop index variables (of single character or not) for dealing with 4 dimensions and above?
I was helping another student working through CS50x who was just learning ...
22
votes
8
answers
5k
views
At what point is it taboo to have loops within loops?
Just curious. The most I have ever had was a for loop within a for loop, because after reading this from Linus Torvalds:
Tabs are 8 characters, and thus indentations are also 8 characters.
There ...
- 3,613
1
vote
1
answer
1k
views
How to name variables without plural in a for-each loop? [closed]
How do you name loop variables when the list item is named after something without a plural? For instance (in python): [x for x in sheep]. x is not a great name, but sheep have/has no plural that ...
- 1,033
2
votes
3
answers
521
views
The recommended Way to exit a Loop
Occasionally - but recurringly - I face the following loop pattern problem:
CodeSnippet1
DO WHILE LoopCondition //LoopCondition depends on some pre-calculation from CodeSnippet1
CodeSnippet2 ...
- 123
8
votes
5
answers
55k
views
How to structure a loop that repeats until success and handles failures
I am a self-taught programmer. I started programming about 1.5 years ago. Now I have started to have programming classes in school. We have had programming classes for 1/2 year and will have another 1/...
- 1,007