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lines changed Original file line number Diff line number Diff line change @@ -22,15 +22,15 @@ cities.unshift('New York');
2222console . log ( 'shift: ' + cities . shift ( ) ) ;
2323console . log ( 'pop: ' + cities . pop ( ) ) ;
2424
25- console . log ( { i } , typeof ( i ) ) ;
26- console . log ( { s } , typeof ( s ) ) ;
27- console . log ( { b } , typeof ( b ) ) ;
28- console . log ( { f } , typeof ( f ) ) ;
25+ console . log ( { i } , typeof i ) ;
26+ console . log ( { s } , typeof s ) ;
27+ console . log ( { b } , typeof b ) ;
28+ console . log ( { f } , typeof f ) ;
2929
30- console . log ( { person } , typeof ( person ) ) ;
30+ console . log ( { person } , typeof person ) ;
3131console . log ( { isArray : Array . isArray ( person ) } ) ;
3232
33- console . log ( { cities } , typeof ( cities ) ) ;
33+ console . log ( { cities } , typeof cities ) ;
3434console . log ( { isArray : Array . isArray ( cities ) } ) ;
3535
3636console . log ( { instanceofArray : cities instanceof Array } ) ;
Original file line number Diff line number Diff line change 22
33// undefined
44let emptyScalar ;
5- console . log ( { emptyScalar } , typeof ( emptyScalar ) ) ;
5+ console . log ( { emptyScalar } , typeof emptyScalar ) ;
66
77// null
88const emptyObject = null ;
9- console . log ( { emptyObject } , typeof ( emptyObject ) ) ;
9+ console . log ( { emptyObject } , typeof emptyObject ) ;
1010
1111// NaN
1212let count = NaN ;
13- console . log ( { count } , typeof ( count ) ) ;
13+ console . log ( { count } , typeof count ) ;
1414
1515count = undefined + 1 ;
1616console . dir ( { count } ) ;
1717
18- console . log ( Infinity , - Infinity , typeof ( Infinity ) ) ;
18+ console . log ( Infinity , - Infinity , typeof Infinity ) ;
1919
2020const s = (
2121 emptyObject === null ?
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