var a = {a: 1};
var b = {a: 1};
a.prototype === b.prototype
true
a === b
false
a + b
[object Object][object Object] String
a - b
NaN Not a number
Equality [] === []
false
Equality [] === new Array()
false
Equality [] === {}
false
Equality {} === {}
false
Equality {} === new Object()
false
Array Addition [1,2] + [1,3]
1,21,3
Array Subtraction [1,2] - [1,3]
NaN
Not a number
Array + Object Addition [] + {}
[object Object]
String
Object + Object Addition {} + {}
[object Object][object Object]
String
Subtraction [] - []
0
Number
Subtraction [] - {}
NaN
Not a number
Subtraction {} - {}
NaN
Not a number