2.1.2.3 count_list

Description

Count a string list ,then construct a string vector and an appearance frequency vector for all duplicate occurences

Syntax

int count_list( const vector<string> & vsList, vector<string> & vsUnique, vector<uint> & vnCounts, bool bCaseSensitive = false )

bool count_list( const vector<string> & vsList, vector<int> & vnIndices, bool bCaseSensitive = false )

Parameters

vsList

[input] string list to be counted

vsUnique

[output] unique strings in the given list

vnCounts

[output] frequency count of each unique string

bCaseSensitive

[input] true if string comparison is case sensitive

vsList

[input] string list to be counted

vnIndices

[output] corresponding array to hold indices of the counting

bCaseSensitive

[input] true if string comparison is case sensitive

Return

total number of multiple occurences. 0 if input strings are already all unique

true if there is at least one duplicates in the given list. false if input strings are all unique

Examples

EX1

void count_list_ex1()
{
    vector<string> vsList = {"Boston", "New York", "DC", "New York", "Tempa",
                         "boston","New York"};
    vector<string> vsUnique;
    vector<uint> vnCounts;
    
    int nCount = count_list(vsList, vsUnique, vnCounts, true);	//case sensitive 
    out_int("nCount = ",nCount);	//nCount equals to 2
    
    if(nCount > 0)
    {
        printf("Duplicate string found\n");
        for(int ii = 0; ii < vsUnique.GetSize(); ii++)
        {
            if(vnCounts[ii] > 1)
                printf("%s: %d\n", vsUnique[ii], vnCounts[ii]);
                //New York: 3
        }
    }
}

EX2

void count_list_ex2()
{
    vector<string> vsList = {"Boston", "New York", "Boston", "DC", 
                             "New York", "Tempa","New York"};
    vector<int> vnIndices;

    if(count_list(vsList, vnIndices))
    {
        printf("Duplicate string found\n");
        for(int ii = 0; ii < vnIndices.GetSize(); ii++)
        {
            printf("%s: %d\n", vsList[ii], vnIndices[ii]); 
           //Output indices for all duplicate occurences
        }
    }
}

Remark

See Also

Header to Include

origin.h

Reference