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helpers.hpp
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helpers.hpp
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/*
* Filename: to_string.hpp
*
* Description: definition of a string convertion
*
* Version: 1.0
* Created: 02/14/2008 06:55:12 PM
*
* Author: Jan Funke, TU Dresden
*/
#include <cassert>
#include <vector>
#include <string>
#include <sstream>
#include <iostream>
#include <iomanip>
namespace util {
template<class T>
inline std::string to_string(const T& value) {
std::ostringstream streamOut;
streamOut << value;
return streamOut.str();
}
template<class T>
inline std::string to_string_with_leading_zeros(const T& value, unsigned num_zeros) {
std::ostringstream streamOut;
streamOut << std::setw(num_zeros) << std::setfill('0') << value;
return streamOut.str();
}
template<class T>
inline T from_string(const std::string& string) {
std::istringstream streamIn(string);
T value;
streamIn >> value;
return value;
}
} // namespace util
template<class T, class U>
std::vector<T> operator+(std::vector<T> lhs, std::vector<U> rhs) {
assert(lhs.size() == rhs.size());
std::vector<T> result;
for (int i = 0; i < lhs.size(); i++)
result.push_back(lhs[i] + (T)rhs[i]);
return result;
}
//
//template<class T, class U>
//std::vector<T> operator+(std::vector<T>& lhs, std::vector<U>& rhs) {
//
// assert(lhs.size() == rhs.size());
// std::vector<T> result;
// for (int i = 0; i < lhs.size(); i++)
// result.push_back(lhs[i] + rhs[i]);
// return result;
//}
template<class T, class U>
std::vector<T>& operator+=(std::vector<T>& lhs, std::vector<U>& rhs) {
assert(lhs.size() == rhs.size());
for (int i = 0; i < lhs.size(); i++)
lhs[i] += rhs[i];
return lhs;
}
template<class T, class U>
std::vector<T> operator-(std::vector<T> lhs, std::vector<U> rhs) {
assert(lhs.size() == rhs.size());
std::vector<T> result;
for (int i = 0; i < lhs.size(); i++)
result.push_back(lhs[i] - rhs[i]);
return result;
}
template<class T, class U>
std::vector<T>& operator-=(std::vector<T>& lhs, std::vector<U>& rhs) {
assert(lhs.size() == rhs.size());
for (int i = 0; i < lhs.size(); i++)
lhs[i] -= rhs[i];
return lhs;
}
template<class T>
T operator*(std::vector<T>& lhs, std::vector<T>& rhs) {
assert(lhs.size() == rhs.size());
T result = 0.0;
for (int i = 0; i < lhs.size(); i++)
result += lhs[i] * rhs[i];
return result;
}
template<class T, class U>
std::vector<T> operator*(std::vector<T> lhs, U rhs) {
for (int i = 0; i < lhs.size(); i++)
lhs[i] *= rhs;
return lhs;
}
template<class T, class U>
std::vector<T> operator*(std::vector<T>& lhs, U rhs) {
for (int i = 0; i < lhs.size(); i++)
lhs[i] *= rhs;
return lhs;
}
template<class T, class U>
std::vector<T>& operator*=(std::vector<T>& lhs, U rhs) {
for (int i = 0; i < lhs.size(); i++)
lhs[i] *= rhs;
return lhs;
}
template<class T, class U>
std::vector<T> operator/(std::vector<T>& lhs, U& rhs) {
std::vector<T> result;
for (int i = 0; i < lhs.size(); i++)
result.push_back(lhs[i] / rhs);
return result;
}
template<class T, class U>
std::vector<T> operator/(std::vector<T>& lhs, U rhs) {
std::vector<T> result;
for (int i = 0; i < lhs.size(); i++)
result.push_back(lhs[i] / rhs);
return result;
}
template<class T, class U>
std::vector<T>& operator/=(std::vector<T>& lhs, U& rhs) {
for (int i = 0; i < lhs.size(); i++)
lhs[i] /= rhs;
return lhs;
}
template<class T, class U>
std::vector<T>& operator/=(std::vector<T>& lhs, U rhs) {
for (int i = 0; i < lhs.size(); i++)
lhs[i] /= rhs;
return lhs;
}
template<class T>
std::ostream& operator<<(std::ostream& os, std::vector<T> vector) {
os << "[";
for (unsigned int i = 0; i < vector.size(); i++) {
os << vector[i];
if (i != vector.size() - 1)
os << ", ";
}
os << "]";
return os;
}