--- (1) ---
false
true

--- (2) ---
normalObj is: [object Object]
Cannot convert object to primitive value
TypeError: Cannot convert object to primitive value
    at Object.<anonymous> (E:\Angular\JS\Basic\Object.js:28:37)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at Module.load (node:internal/modules/cjs/loader:1119:32)
    at Module._load (node:internal/modules/cjs/loader:960:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47
{}
nullProtoObj.valueOf is not a function
TypeError: nullProtoObj.valueOf is not a function
    at Object.<anonymous> (E:\Angular\JS\Basic\Object.js:35:18)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at Module.load (node:internal/modules/cjs/loader:1119:32)
    at Module._load (node:internal/modules/cjs/loader:960:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47
false
nullProtoObj.hasOwnProperty is not a function
TypeError: nullProtoObj.hasOwnProperty is not a function
    at Object.<anonymous> (E:\Angular\JS\Basic\Object.js:42:18)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at Module.load (node:internal/modules/cjs/loader:1119:32)
    at Module._load (node:internal/modules/cjs/loader:960:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47
[Function: Object]
undefined
[object Object]
nullProtoObj is: [object Object]

--- (3) ---
true
[Function: toString]

--- (4) ---
false
undefined

--- (5) ---

--- (6) ---

--- (7) ---

--- (8) ---

--- (9) ---
key:1value:one
key:2value:two

--- (10) ---
{
    abc: "hello",
    bca: "allo",
    cab: "dd:cc",
    d: [
        "hello",
        "llo",
        "dd:cc"
    ],
    e: {
        abc: "hello",
        bca: "allo",
        cab: "dd:cc"
    }
}

--- (11 ) ---
false
true
false
true

--- (12 ) ---
j1 {}
j2 {
  abc: 'hello',
  bca: 'allo',
  cab: 'dd:cc',
  d: [ 'hello', 'llo', 'dd:cc' ],
  e: { abc: 'hello', bca: 'allo', cab: 'dd:cc' },
  sum: undefined
}
j3 {
  abc: 'hello',
  bca: 'allo',
  cab: 'dd:cc',
  d: [ 'hello', 'llo', 'dd:cc' ],
  e: { abc: 'hello', bca: 'allo', cab: 'dd:cc' },
  sum: undefined
}
j4 {
  value: undefined,
  writable: false,
  enumerable: true,
  configurable: true
}
j5 [ 'abc', 'bca', 'cab', 'd', 'e', 'sum', 'property1', 'property2' ]
j6 [Object: null prototype] { authenticated: true }
j7 [ 'abc', 'bca', 'cab', 'd', 'e', 'sum' ]

--- (13 ) ---
{
  abc: 'hello',
  bca: 'allo',
  cab: 'dd:cc',
  d: [ 'hello', 'llo', 'dd:cc' ],
  e: { abc: 'hello', bca: 'allo', cab: 'dd:cc' },
  sum: undefined
}
false
{
  abc: 'hello',
  bca: 'allo',
  cab: 'dd:cc',
  d: [ 'hello', 'llo', 'dd:cc' ],
  e: { abc: 'hello', bca: 'allo', cab: 'dd:cc' },
  sum: undefined
}
true
{
  abc: 'hello',
  bca: 'allo',
  cab: 'dd:cc',
  d: [ 'hello', 'llo', 'dd:cc' ],
  e: { abc: 'hello', bca: 'allo', cab: 'dd:cc' },
  sum: undefined
}
true