| Global object builtin properties |
| delete NaN : false |
| NaN : NaN |
| delete Infinity : false |
| Infinity : Infinity |
| delete undefined : false |
| undefined : undefined |
| NaN= "hello"; : hello |
| NaN : NaN |
| Infinity= "hello"; : hello |
| Infinity : Infinity |
| undefined= "hello"; : hello |
| undefined : undefined |
| Math Object builtin properties |
| Math.PI = overwrite : hello |
| Math.PI : 3.141592653589793 |
| Math.E = overwrite : hello |
| Math.E : 2.718281828459045 |
| Math.LN10 = overwrite : hello |
| Math.LN10 : 2.302585092994046 |
| Math.LN2 = overwrite : hello |
| Math.LN2 : 0.6931471805599453 |
| Math.LOG2E = overwrite : hello |
| Math.LOG2E : 1.4426950408889634 |
| Math.LOG10E = overwrite : hello |
| Math.LOG10E : 0.4342944819032518 |
| Math.SQRT1_2 = overwrite : hello |
| Math.SQRT1_2 : 0.7071067811865476 |
| Math.SQRT2 = overwrite : hello |
| Math.SQRT2 : 1.4142135623730951 |
| delete Math.PI : false |
| Math.PI : 3.141592653589793 |
| delete Math.E : false |
| Math.E : 2.718281828459045 |
| delete Math.LN10 : false |
| Math.LN10 : 2.302585092994046 |
| delete Math.LN2 : false |
| Math.LN2 : 0.6931471805599453 |
| delete Math.LOG2E : false |
| Math.LOG2E : 1.4426950408889634 |
| delete Math.LOG10E : false |
| Math.LOG10E : 0.4342944819032518 |
| delete Math.SQRT1_2 : false |
| Math.SQRT1_2 : 0.7071067811865476 |
| delete Math.SQRT2 : false |
| Math.SQRT2 : 1.4142135623730951 |
| Number Object builtin properties |
| Number.MAX_VALUE = overwrite : hello |
| Number.MAX_VALUE : 1.7976931348623157e+308 |
| Number.MIN_VALUE = overwrite : hello |
| Number.MIN_VALUE : 5e-324 |
| Number.NaN = overwrite : hello |
| Number.NaN : NaN |
| Number.NEGATIVE_INFINITY = overwrite : hello |
| Number.NEGATIVE_INFINITY : -Infinity |
| Number.POSITIVE_INFINITY = overwrite : hello |
| Number.POSITIVE_INFINITY : Infinity |
| delete Number.MAX_VALUE : false |
| Number.MAX_VALUE : 1.7976931348623157e+308 |
| delete Number.MIN_VALUE : false |
| Number.MIN_VALUE : 5e-324 |
| delete Number.NaN : false |
| Number.NaN : NaN |
| delete Number.NEGATIVE_INFINITY : false |
| Number.NEGATIVE_INFINITY : -Infinity |
| delete Number.POSITIVE_INFINITY : false |
| Number.POSITIVE_INFINITY : Infinity |
| delete Number.undefined : true |
| Number.undefined : undefined |
| delete Number.undefined : true |
| Number.undefined : undefined |
| delete Number.undefined : true |
| Number.undefined : undefined |
