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(Not) Everything in JavaScript is an Object

Daniel Li on June 26, 2017

This was originally published on The Brewing Press For those who just wants the answers, feel free to jump to the 'Summary' at the end. There a...

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Juan Pablo de la Torre • Jul 1 '22

Well, actually:

/* This is a zero -> */ 0 /* it could be any number */
// The following defines a function into 0's prototype
.__proto__.pow = function (exponent) {
   return Math.pow(this, exponent)
}

2..pow(5)     // 32
4.5.pow(3)    // 91.125
1.1e2.pow(2)  // 12100
0b100.pow(.5) // 2 > square root
0x1b.pow(1/3) // 3 > cubic root

All of that is valid JS (including the comments between 0 and that period).

3612 Muñoz • Feb 14

🤯

Sophie The Lionhart • Jun 27 '17 • Edited

Great article.

Remember kiddos,

String("string") == "string";

but

String("string") !== "string";

David Smith • Jul 9 '17 • Edited

String("string") == "string";
true
String("string") === "string";
true
String("string") != "string";
false
String("string") !== "string";
false

Sophie The Lionhart • Jul 10 '17

Hrmmm..... I had done basically the same thing in my console when I made my comment, but I had a different result that day. I honestly expected your to be the case but I got what I typed before. I must have had a typo or something. MB

David Smith • Jul 10 '17 • Edited

I think you forgot the new keyword:

y = "string"
"string"
x = new String("string")
String {0: "s", 1: "t", 2: "r", 3: "i", 4: "n", 5: "g", length: 6, [[PrimitiveValue]]: "string"}
x === y
false
String("string") === "string"
true
new String("string") === "string"
false
typeof(x)
"object"
typeof(y)
"string"

Sophie The Lionhart • Jul 10 '17

That's most likely it. You're far more knowledgeable than me in this area it seems. Thanks for adding the clarity for future readers and teaching me something!