vector<string> letterCombinations(string digits) {
vector<string> res;
if(digits.size() == 0) return res;
string tmpres(digits.size(), ' ');
dfs(digits, 0, tmpres, res);
return res;
}
/**
* Multiplication operator, left-multilpies a BezierPatch by en ordinary vector (a parameter vector).
* This can be used to left-multiply a BezierPatch by a parameter vector.
* \param bezierpatch - The BezierPatch that should be multimplied.
* \param vector - The vector (a parameter vector) that is left-multiplied by the bezier patch.
* \return The product bezierpatch * vector which is of type BezierRow.
*/
BezierRow operator*(glm::vec4 const& vector, BezierPatch const& bezierpatch)
{
BezierRow result;
for (int j = 1; j <= 4; ++j) {
glm::vec3 tmpres(0.0f);
for (int i = 1; i <= 4; ++i) {
tmpres += vector[i - 1] * bezierpatch[i][j];
}
result[j] = tmpres;
}
return result;
}
void FileReferenceImpl::Pread(void *buffer, size_t size, off64_t offset) {
// run when pool.mutex is NOT locked
SignalingFileReservation tmpres(GetReservation());
if (!tmpres) {
throw khSimpleException("FileReferenceImpl::Pread: NULL tmpres");
}
if (!khPreadAll(tmpres->Fd(), buffer, size, offset)) {
throw khSimpleErrnoException()
<< "Unable to read " << size << " bytes from offset "
<< offset << " in " << fname;
}
}
std::vector<int> Lotto(int qty, int ch)
{
int buff[qty];
for (int i = 1, limit = qty+1; i < limit; i++ )
buff[i-1] = i;
std::vector<int> tmpvec (buff, buff + qty);
std::vector<int> tmpres(ch);
std::random_shuffle(tmpvec.begin(), tmpvec.end());
std::copy(tmpvec.begin(), tmpvec.begin()+ch, tmpres.begin());
return tmpres;
}
/**
* Multiplication operator, left-multiplies a BezierPatch by an ordinary matrix (a basis matrix).
* This can be used to left-multiply a BezierPatch by a basis matrix.
* \param bezierpatch - The BezierPatch that should be multimplied.
* \param matrix - The matrix (a basis matrix) that is left-multiplied by the bezier patch.
* \return The product matrix * bezierpatch which is of type BezierPatch.
*/
BezierPatch operator*(glm::mat4x4 const& matrix, BezierPatch const& bezierpatch)
{
BezierPatch result;
for (int i = 1; i <= 4; ++i) {
for (int j = 1; j <= 4; ++j) {
glm::vec4 row(glm::row(matrix, i - 1));
glm::vec3 tmpres(0.0f);
for (int k = 1; k <= 4; ++k) {
tmpres += row[k - 1] * bezierpatch[k][j];
}
result[i][j] = tmpres;
}
}
return result;
}
vector<string> letterCombinations(string digits) {
vector<string> result;
string tmpres(digits.size(), ' ');
dfs(digits, 0, tmpres, result);
return result;
}
