C++ (Cpp) MAP::clear Examples

Programming Language: C++ (Cpp)

Class/Type: MAP

Method/Function: clear

Examples at hotexamples.com: 2

The clear() function in C++ map library is used to remove all the elements from the map container.

Example 1:

#include 
#include 
using namespace std;

int main() {
    map employees;
    employees.insert({1, "John"});
    employees.insert({2, "Mary"});
    employees.insert({3, "Tommy"});
    cout << "The number of employees is: " << employees.size() << endl;
    employees.clear();
    cout << "The number of employees after clearing is: " << employees.size() << endl;
    return 0;
}

Output:

The number of employees is: 3
The number of employees after clearing is: 0

In this example, we declare a map object with key-value pairs denoting employee ID and name. After adding employees to the map, we use the clear() function to remove all the elements from the map. The size() function is used to verify that all elements have been removed.

Package Library: C++ Standard Library

Example 2:

#include 
#include 
using namespace std;

int main() {
    map numbers;
    numbers[1] = 10;
    numbers[2] = 20;
    cout << "The sum of the numbers is: " << numbers[1] + numbers[2] << endl;
    numbers.clear();
    cout << "The sum of the numbers after clearing is: " << numbers[1] + numbers[2] << endl;
    return 0;
}

Output:

The sum of the numbers is: 30
The sum of the numbers after clearing is: 0

In this example, we declare a map object with key-value pairs denoting numbers. After adding numbers to the map, we use the clear() function to remove all the elements from the map. We then try to sum the values of the numbers and get 0 as the result since there are no elements in the map. Package Library: C++ Standard Library

C++ (Cpp) MAP::clear - 2 examples found. These are the top rated real world C++ (Cpp) examples of MAP::clear extracted from open source projects. You can rate examples to help us improve the quality of examples.

Frequently Used Methods

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end(30)

begin(25)

find(22)

insert(14)

GetZRegionMax(13)

GetXRegionMax(11)

getEmbedding(8)

RegionUserRemove(8)

size(8)

RegionUserAdd(6)

current_size(5)

next(5)

phi1(4)

getNbDarts(3)

storage(3)

erase(3)

GetMapSize(3)

lower_bound(2)

isOrbitEmbedded(2)

insertIndividualPoint(2)

setSize(2)

stat(2)

switchFree(2)

unbind(2)

clear(2)

IsRoomCheck(2)

context(2)

removeAttribute(1)

bind_modify_key(1)

bind_create_key(1)

newFace(1)

askDartBuffer(1)

openMap(1)

add_face(1)

phi2(1)

phi3(1)

rbegin(1)

recover_key(1)

remove(1)

dimension(1)

removeThreadId(1)

isInside(1)

rend(1)

saveMapBin(1)

add_dynamic_circle(1)

sewFaces(1)

addEmptyThreadId(1)

solve(1)

solve_smooth(1)

solved(1)

Example #1

Show file

File: CPointsMap_unittest.cpp Project: gamman/MRPT

void load_demo_9pts_map(MAP &pts)
{
	pts.clear();
	for (size_t i=0;i<demo9_N;i++)
		pts.insertPoint(demo9_xs[i],demo9_ys[i],demo9_zs[i]);
}

Example #2

Show file

File: rbtree.cpp Project: hellcoderz/ADS

 ///making hashtable null to be used for next iteration
 void make_root_null() {
     for ( int i = 0; i < s; i++ ) {
         hashmap.clear();
     }
 }