How to use 2 Replace Function at same time in c# win. form

Question

1.00/5 (1 vote)

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Today i have a unique requirement which i am going to explain with an example

My String

string s = "aaaabcc";

Now i want to use 2 replace functions at same time. so, answer would be like this:-
OUTPUT

ccccbaa

Till now i don't know how to start as when i write

string s = "aaaabcc";
s = s.Replace("a","c").Replace("c","a");

the answer goes wrong cause last replace function removes the newly added char.
Can anyone help me here any piece of code snippet would be helpful

Thanks in advance

Posted 31-Oct-14 0:40am

agent_kruger

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Mehdi Gholam · Accepted Answer · 2014-10-31T01:06:00

Solution 1

Since you are replacing the same chars then you should use a temp char:

C#

string s = "aaaabcc";
s = s.Replace("a","x");
s = s.Replace("c","a");
s = s.Replace("x","c");

Edit:
Use the following code:

C#

string s = "aaaabcc";
StringBuilder sb = new StringBuilder();
foreach(var c in s)
{
    if(c == 'a')
        sb.Append('c');
    else if(c == 'c')
        sb.Append('a');
    else
        sb.Append(c);
}
string outs = sb.ToString();

Posted 31-Oct-14 1:06am

Mehdi Gholam

Updated 31-Oct-14 2:11am

v2

Comments

agent_kruger 31-Oct-14 7:10am

cant sir because every char in the char map has already been taken

Mehdi Gholam 31-Oct-14 7:19am

Use a punctuation character like | ~ ! etc.

agent_kruger 31-Oct-14 7:59am

sir as i have said that every char in the char space chart is being used in the software that is why i cannot use this method

agent_kruger 31-Oct-14 7:16am

sir, any other idea about this question?

Mehdi Gholam 31-Oct-14 8:12am

See the update.

agent_kruger 31-Oct-14 9:12am

seems kind of perfect but problem is that size of my actual string is 1,000,000 length of string and using loop or iteration is just a bad idea. But still great +5 vote and see if you can help me any further

Mehdi Gholam 31-Oct-14 9:18am

The above code will be faster that Replace() given your limitations.

PIEBALDconsult 1-Nov-14 2:12am

Something has to loop, and the fewest iterations the better, Replace is probably the worst technique for this task.

agent_kruger 1-Nov-14 2:50am

sir, i want to ask is there any way to use your 1st version of answer here but the problem is that in my string all "65535" char has been taken.