+ 5

Need algorithm advices

I don't have the code with me but I started to write an algorithm to do something quite simple. I'm afraid to fall and trap myself in a "if" nested structure when I will continue. Here is the thing: From an API, my script will receive strings with this kind look "12, 127, 298". What I want to do is: If number are not following each other I have to keep it "12 - 127 - 298" but if I got "12, 13, 14, 127, 298" it should become "12 to 14 - 127 - 298". I never know how many numbers I'm going to receive...

5th Apr 2017, 4:35 PM
Geoffrey L
Geoffrey L - avatar
7 Answers
+ 16
I wrote a js script for u maybe it will help //your array(from api) var arr = [12, 13, 14, 15, 130, 190, 191, 192, 273, 402]; //result array after formatting var result = []; var i = 0; //idk why i named it calc... function calc(){ //check if the next element is equals to this element +1 if(arr[i] + 1 == arr[i+1]){ var from = arr[i]; //increase i as long as the numbers increse by 1 do{ i++; }while(arr[i] + 1 == arr[i+1]); result.push(from + " to " + arr[i]); i++; }else{ //if the numbers don't increase by 1 just add a new element result.push(arr[i]); i++; } //stop calling when you reach the end if(i < arr.length){ calc(); } } calc(); alert(result); feel free to ask if something is not clear I know it could be better, I just wrote it very fast on my phone so...
5th Apr 2017, 5:42 PM
Kamil
Kamil - avatar
+ 12
@Geoffrey Lavenez Wow it's Great! Glad I could help you 😁
7th Apr 2017, 5:56 AM
Kamil
Kamil - avatar
+ 5
For sure my problem is not about how to split or convert string to number, it's really about how to group them in the most easy way without build a mastermind.
5th Apr 2017, 4:36 PM
Geoffrey L
Geoffrey L - avatar
+ 5
Oh yeah finally made it with your help Kamil! Here is the result: https://code.sololearn.com/WBo7W7g9EPRm
6th Apr 2017, 9:42 AM
Geoffrey L
Geoffrey L - avatar
+ 5
Wouhouh I just update it and I don't see any more bug :3
14th Apr 2017, 8:35 AM
Geoffrey L
Geoffrey L - avatar
+ 4
Thanks Kamil! I will tell you tomorrow, I don't want to test with my phone =)
5th Apr 2017, 8:52 PM
Geoffrey L
Geoffrey L - avatar
+ 4
Thanks! I still need to correct a small bug but the main is there.
7th Apr 2017, 5:57 AM
Geoffrey L
Geoffrey L - avatar