programming-examples/Check if an object contains specified property.js at 599b63599ba0df3a018fab54770721cca32ef15b - programming-examples - michuIT: Everything is code

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     function hasKey(obj, key) {
         return obj != null && hasOwnProperty.call(obj, key);
       }
     console.log(hasKey({red: "#FF0000", green: "#00FF00", white: "#FFFFFF"}, "green"));