c# 2 lines with same first charcters how can i delete second one??

sandrine10 said:

the numbers are random ids(as 20897655 ) seems difficult to use what u suggest but in the other hand we can use regex pattern to find the string before the last slash as the url is the same before that.
Any idea?

Click to expand...

Isn't regex a bit overkill?

Click to expand...

var list = getItemsIntoList()
var listDomainsHandled = new  List<string>();
var listResults = new List<string>();
foreach(var line in list){
   var dom  = GetDomain(line);
   if(!listDomainsHandled .Contains(dom)){
        listResults.Add(line);
    }

}

rootjazz said:

why on earth would you use a regex?


Not overkill, more wrong.


What EXACTLY are you trying to do?


Do you want to delete second line because it also starts with a "u" or because there are "url1" or because they will be URLs?

So what you really want is a way to take a list of URLs and end up with a list of URLs where the domain only exists once?



Get your lines into a list
loop list
get domain of line,
if not processed before,
add to a results list
log domain

Code:

var list = getItemsIntoList()
var listDomainsHandled = new  List<string>();
var listResults = new List<string>();
foreach(var line in list){
   var dom  = GetDomain(line);
   if(!listDomainsHandled .Contains(dom)){
        listResults.Add(line);
    }

}

Click to expand...

sandrine10 said:

Hey Guys,

as mentionned in the title,in c# if 2 lines have same first characters how can i delete second one?!
lines like this:

url1/page1/title1/number1
url1/page1/title1/number2

wanna keep the first link and delete the second one,any idea?

Click to expand...

list() //an array that contains all that lines;
var curentline //the 'i' element;
var nextline // the 'i+1' element
for (i=0; i < (list.count - 1); i++){
    curentline = list(i);
    if (i+1 <= list.count-1){
        nextline = list(i+1);
        fisrtchar1 = curentline(0); //get the fisr char of the curent line, you may need to convert string to array
        fisrtchar2 = nextline(0); //get the fisr char of the next line, you may need to convert string to array
        if (fisrtchar1 == fisrtchar2){
            //remove the element list(i+1), this may effect the loop, so it better just to store the element info and remove it latter
        }
    }else{
        nextline = empty;
    }
}