Object Functions¶
Note
For functions related to creating and updating records in the database, please see the record functions documentation.
object\clear( )¶
The object\clear() function removes the value associated with a KEY from an OBJECT. This function returns a pointer to the OBJECT, although retaining the reference to the object is optional.
Example:
$object = object\create();
object\set($object, 'firstName', 'Albert');
object\set($object, 'lastName', 'Einstein');
object\clear($object, 'lastName');
output\printLine($object); // Outputs: {"firstName":"Albert"}
object\cloneDeep( )¶
The object\cloneDeep() function generates a deep copy of an OBJECT. This function returns a pointer to the new object, but maintaining the reference to the original object is not necessary.
Example:
$object = object\create();
object\set($object, 'firstName', 'Albert');
object\set($object, 'lastName', 'Einstein');
$results = object\create();
object\set($results, 'Science', 'A');
object\set($results, 'Maths', 'A+');
object\set($results, 'English', 'B');
object\set($object, 'results', $results);
$object2 = object\cloneDeep($object);
$object3 = $object;
object\clear($object, 'lastName');
output\printLine($object);
// Outputs: {"firstName":"Albert","results":{"Science":"A","Maths":"A+","English":"B"}}
output\printLine($object2);
// Outputs: {"firstName":"Albert","lastName":"Einstein","results":{"Science":"A","Maths":"A+","English":"B"}}
output\printLine($object3);
// Outputs: {"firstName":"Albert","results":{"Science":"A","Maths":"A+","English":"B"}}
object\create( )¶
The object\create() function creates a new, empty object (a key-value map) and returns it. Objects can be made hierarchical by creating additional objects and assigning them to keys.
Examples:
$object = object\create();
object\set($object, 'firstName', 'Albert');
object\set($object, 'lastName', 'Einstein');
output\printLine($object); // Outputs: {"firstName":"Albert","lastName":"Einstein"}
$object = object\create();
object\set($object, 'firstName', 'Albert');
object\set($object, 'lastName', 'Einstein');
$results = object\create();
object\set($results, 'Science', 'A');
object\set($results, 'Maths', 'A+');
object\set($results, 'English', 'B');
object\set($object, 'results', $results);
output\printLine($object);
// Outputs: {"firstName":"Albert","lastName":"Einstein","results":{"Science":"A","Maths":"A+","English":"B"}}
Example 4 demonstrates the creation of a more complex object structure, including its corresponding JSON representation.
// Define student 1 - Albert Einstein
$student1 = object\create();
object\set($student1, 'id', '0001');
object\set($student1, 'firstName', 'Albert');
object\set($student1, 'lastName', 'Einstein');
// Define student 1 results
$student1Results = object\create();
object\set($student1Results, 'Science', 'A');
object\set($student1Results, 'Maths', 'A+');
object\set($student1Results, 'English', 'B');
object\set($student1Results, 'Physics', 'A+');
// Add results to student 1 object
object\set($student1, 'results', $student1Results);
// Define student 2 - Issac Newton
$student2 = object\create();
object\set($student2, 'id', '0002');
object\set($student2, 'firstName', 'Issac');
object\set($student2, 'lastName', 'Newton');
// Define student 2 results
$student2Results = object\create();
object\set($student2Results, 'Science', 'A+');
object\set($student2Results, 'Maths', 'A+');
object\set($student2Results, 'English', 'C');
object\set($student2Results, 'Chemistry', 'C');
// Add results to student 2 object
object\set($student2, 'results', $student2Results);
// Define student 3 - Max Plank
$student3 = object\create();
object\set($student3, 'id', '0003');
object\set($student3, 'firstName', 'Max');
object\set($student3, 'lastName', 'Plank');
// Define student 3 results
$student3Results = object\create();
object\set($student3Results, 'Science', 'A');
object\set($student3Results, 'Maths', 'B');
object\set($student3Results, 'English', 'C');
// Add results to student 3 object
object\set($student3, 'results', $student3Results);
// Define student 4 - Charles Darwin
$student4 = object\create();
object\set($student4, 'id', '0004');
object\set($student4, 'firstName', 'Charles');
object\set($student4, 'lastName', 'Darwin');
// Define student 4 results
$student4Results = object\create();
object\set($student4Results, 'Science', 'B');
object\set($student4Results, 'Maths', 'C');
object\set($student4Results, 'English', 'B');
// Add results to student 4 object
object\set($student4, 'results', $student4Results);
// Define student 5 - Marie Curie
$student5 = object\create();
object\set($student5, 'id', '0005');
object\set($student5, 'firstName', 'Marie');
object\set($student5, 'lastName', 'Curie');
// Define student 5 results
$student5Results = object\create();
object\set($student5Results, 'Science', 'B');
object\set($student5Results, 'Maths', 'C');
object\set($student5Results, 'English', 'B');
// Add results to student 5 object
object\set($student5, 'results', $student5Results);
// Define student 6 - Nikola Tesla
$student6 = object\create();
object\set($student6, 'id', '0006');
object\set($student6, 'firstName', 'Nikola');
object\set($student6, 'lastName', 'Tesla');
// Define student 6 results
$student6Results = object\create();
object\set($student6Results, 'Science', 'B');
object\set($student6Results, 'Maths', 'B+');
object\set($student6Results, 'English', 'C');
object\set($student6Results, 'Physics', 'A+');
// Add results to student 6 object
object\set($student6, 'results', $student6Results);
// Create an array of student objects
$listOfStudents = array\push($listOfStudents, $student1, $student2, $student3, $student4, $student5, $student6);
// Create a students object and add the array of students to the object
$students = object\create();
object\set($students, 'students', $listOfStudents);
output\printLine($students);
{
"students": [
{
"id": "0001",
"firstName": "Albert",
"lastName": "Einstein",
"results": {
"Science": "A",
"Maths": "A+",
"English": "B",
"Physics": "A+"
}
},
{
"id": "0002",
"firstName": "Issac",
"lastName": "Newton",
"results": {
"Science": "A+",
"Maths": "A+",
"English": "C",
"Chemistry": "C"
}
},
{
"id": "0003",
"firstName": "Max",
"lastName": "Plank",
"results": {
"Science": "A",
"Maths": "B",
"English": "C"
}
},
{
"id": "0004",
"firstName": "Charles",
"lastName": "Darwin",
"results": {
"Science": "B",
"Maths": "C",
"English": "B"
}
},
{
"id": "0005",
"firstName": "Marie",
"lastName": "Curie",
"results": {
"Science": "B",
"Maths": "C",
"English": "B"
}
},
{
"id": "0006",
"firstName": "Nikola",
"lastName": "Tesla",
"results": {
"Science": "B",
"Maths": "B+",
"English": "C",
"Physics": "A+"
}
}
]
}
object\get( )¶
The object\get() function obtains the value associated with a specified KEY from an OBJECT. If the KEY does not exist, the function returns NULL.
Examples:
$object = object\create();
object\set($object, 'firstName', 'Albert');
object\set($object, 'lastName', 'Einstein');
$firstName = object\get($object, 'firstName');
output\printLine($firstName); // Outputs: "Albert"
object\has( )¶
The object\has() function checks whether a KEY is associated with a value in an OBJECT, returning a boolean to indicate the presence of the KEY.
Example:
$object = object\create();
object\set($object, 'firstName', 'Albert');
object\set($object, 'lastName', 'Einstein');
output\printLine( object\has($object, 'firstName') ); // Outputs true
output\printLine( object\has($object, 'middleName') ); // Outputs false
object\set( )¶
The object\set() function assigns a VALUE to a KEY in an OBJECT. If the KEY does not exist, it is created and assigned the VALUE. This function returns a pointer to the OBJECT, but maintaining the reference to the object is optional.
Examples:
$object = object\create();
object\set($object, 'firstName', 'Albert');
object\set($object, 'lastName', 'Einstein');
output\printLine($object); // Outputs: {"firstName":"Albert","lastName":"Einstein"}
See Also¶
- Array Functions
- Datetime Functions
- Entity Functions
- Env Functions
- Ext Functions
- JSON Functions
- Language Functions
- Number Functions
- Object Functions
- Output Functions
- Password Functions
- Record Functions
- String Functions
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