remove property from object JS
var person = {"first_name": "Billy","last_name": "Johnson"};
delete person.last_name; //delete last_name property var person = {
name: "Harry",
age: 16,
gender: "Male"
};
// Deleting a property completely
delete person.age;
alert(person.age); // Outputs: undefined
console.log(person); // Prints: {name: "Harry", gender: "Male"}var string = "Hello World";
var substring = "Hello";
if (string.indexOf(substring) != -1) {
//Code here
}
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