Note that you must define the variable x somewhere or the browser will complain.
Sign up or log in Sign up using Google. Take booleans, for example. But the Boolean function can also be used as a constructor with the new keyword:.
In that case assigning true or 1 or '1' to the unitialized variable always returns true when asked. Opera Android Full support Yes.
Boolean value As a normal function, it converts value to a primitive boolean see Converting to Boolean: The function countOccurrences counts how often regex matches inside str:. You can also pass the non boolean variable into the new Boolean and it will make IsLoggedIn boolean. As in mathematics, the bit that's between the brackets is evaluated first.
ECMAScript 1 avoided that cost by making objects always truthy. Like this:.
Instead it returns an object.