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Type-Checking Variables

 
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          Type-Checking Variables

          Variable               typeof Variable        Variable.constructor

          { an: “object” }       object                 Object

          [ “an”, “array” ]      object                 Array

          function(){}           function               Function

          “a string”             string                 String

          55                     number                 Number

          true                   boolean                Boolean

          new User()             object                 User

 

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