javascript if array key exists
var person={"name":"Billy","age":20}
person.hasOwnProperty("name"); // true
person.hasOwnProperty("sex"); // falsejavascript if array key exists
var person={"name":"Billy","age":20}
person.hasOwnProperty("name"); // true
person.hasOwnProperty("sex"); // falsecheck if a key exists in an object javascript
"key" in obj // true, regardless of the actual valueCopyright © 2021 Codeinu
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