I am creating the map as follows:
var employeeMap = new Object();
addElement(employeeMap , 1, "ABC");
addElement(employeeMap , 2, "ABCD");
alert(getElement(employeeMap,1)); // ABC
function addElement(map,key,value){
map[key] = value;
return map;
}
function getElement(map,key){
return map[key];
}
How to delete a key-value pair from the map ? Is setting the map[key] = null the only option ?
Thanks, Shikha
To actually remove the key/value pair, use delete: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/delete
So you could create a function to remove elements:
function deleteElement(map, key)) {
if (map.hasOwnProperty(key) {
delete map[key];
}
}
And call it like:
deleteElement(employeeMap, 2);
UPDATE:
But as I'm reading, delete returns true if it's successful, and false only if it cannot be deleted (for several reasons). So i guess the real version would be what the other answer has:
function deleteElement(map, key)) {
return (delete map[key]);
}
hasOwnProperty test since delete won't remove properties from the prototype chain.
Use delete:
delete employeeMap[1]
To follow the pattern of your functions:
function deleteElement(map,key){
return delete map[key];
}
deleteElement(employeeMap, 1);
