mapcmp.cpp

#include <iostream>
#include <iomanip>
#include <map>
#include <string>
#include <sequtils.h>
#include <iterator>

using namespace std;

class RuntimeStringCmp
{
public :
  enum cmp_mode { normal, nocase };
private :
  const cmp_mode mode;

  static bool nocase_compare(char c1, char c2) {
    return toupper(c1) < toupper(c2);
  }

public:
  RuntimeStringCmp(cmp_mode m=normal): mode(m) { }

  bool operator() (const string& s1, const string& s2) {
    if (mode == normal) {
      return s1 < s2;
    } else {
      return lexicographical_compare(s1.begin(), s1.end(),
				     s2.begin(), s2.end(),
				     nocase_compare);
    }
  }
};

typedef map<string, string, RuntimeStringCmp> StringStringMap;

void fillAndPrint(StringStringMap& col);

int main(int argc, char *argv[])
{
  StringStringMap col;
  fillAndPrint(col);  

  RuntimeStringCmp comp(RuntimeStringCmp::nocase);
  StringStringMap col2(comp);
  fillAndPrint(col2);

  return 0;
}

void fillAndPrint(StringStringMap& coll)
{
  //fill insert elements in random order
  coll["Deutschland"] = "Germany";
  coll["deutsch"] = "German";
  coll["Haken"] = "snag";
  coll["arbeiten"] = "work";
  coll["Hund"] = "dog";
  coll["gehen"] = "go";
  coll["Unternehmen"] = "enterprise";
  coll["unternehmen"] = "undertake";
  coll["gehen"] = "walk";
  coll["Bestatter"] = "undertaker";
  //print elements

  StringStringMap::iterator pos;
  cout.setf(ios::left, ios::adjustfield);
  for (pos=coll.begin(); pos!=coll.end(); ++pos) {
    cout << setw(15) << pos->first.c_str() << " "
	 << pos->second << endl;
  }
  cout << endl;
}