string concatenation with all possibilities

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1.00/5 (2 votes)

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Hi All,

C#

string pattren = " INC | TRUST | COMPANY | 401K ";
string[] ArrPattern = pattren.Split('|');

Above the string array i need to concatenate all the posibilities like below output.

ex:
INC PLAN COMPANY 401K
INC PLAN COMPANY empty
INC PLAN empty 401k
INC PLAN empty empty
INC empty COMPANY 401k
INC empty empty 401k
INC empty empty empty
empty PLAN COMPANY 401k
...
...
...

Like these 16 combination.

Please share your ideas its very urgent for me.

Regards,
Ram

Posted 13-May-13 3:26am

sethupathiram

Updated 13-May-13 3:35am

RaisKazi

v2

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Simon_Whale 13-May-13 9:53am

please dont cross post it is considered rude

http://www.codeproject.com/Messages/4563297/string-concatenation-with-all-possibilities.aspx

2 solutions

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Eugene Efimov · Answer 1 · 2013-05-13T03:32:00

Solution 1

I am not sure, but take a look at this thread about permutations.

Posted 13-May-13 3:32am

Eugene Efimov

lukeer · Answer 2 · 2013-05-13T03:39:00

At first glance, it looks simple to me.

1) Compute number of possible combinations

C#

int combinations = 2 << ArrPattern.Length;

2) Use a loop to combinations to get all combinations
3) Within the loop, let the individual binary digits decide whether you use an actual word or an empty string.

C#

for ( int i = 0; i < combinations; i++)
{
    StringBuilder singleVariant = new StringBuilder();
    for( int stringIndex = 0; stringIndex < ArrPattern.Length; stringIndex++)
    {
        if( (stringIndex & i) != 0)
        {
            singleVariant.Append(ArrPattern[stringIndex]);
        }
        else
        {
            singleVariant.Append(string.empty);
        }
    }
}

4) Add error handling, space stuffing, bug fixing, input, output, etc