Hi. I have a question/issue regarding multilevel objects and using

Question

Hi. I have a question/issue regarding multilevel objects and using

them with a for loop.

My test code:

const cars = {};
cars[0] = "V2";
cars[1] = {};
cars[1]["p"] = "1.0";
cars[2] = {};
cars[2]["p"] = "1.1";
console.log(JSON.stringify(cars, null, 2));
console.log(cars[1]["p"]);

let text = "";
for (let i = 1; i < cars.length - 1; i++) {
text += cars[i]["p"] + "<br>";
}

the console log shows the correct object and outputs as well the value of "p" from the 2nd element

but the for loop doesnt output anything at all. the for loop did work with a simple non multi level object

what do i miss here/did i do wrong ?

0

30.03.2022

3 ответов

18 просмотров

Darvesh 🍀

https://en.wikipedia.org/wiki/Off-by-one_error

0

30.03.2022

Hitmare Chelien Автор вопроса

Sina
for (let i = 0; i < cars.length; i++) { text += ...

doesnt work either i started with 1 since i don't need the 1st element of the object in this part

0

30.03.2022

Sina · Accepted Answer

Sina

for (let i = 0; i < cars.length; i++) { text += cars[i]["p"] + "<br>"; } Index starts from 0 so i should starts from 0 Also the length starts from one so it's either < length or <= length - 1 not < length - 1 We have cars.length = 2 So cars.length - 1 = 1 i starts from 1. so this equation is false: i < cars.length - 1

0

30.03.2022

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