False == 0 // outputs true true == 1 // outputs

Question

JavaScript

Mohan Barman

False == 0 // outputs true true == 1 // outputs

true

//So, why not

null == 0 // outputs false ?
+null == 0 // But this outputs true

0

02.01.2020

6 ответов

14 просмотров

ＭＵＴＨＵ・ＫＵＭＡＲ「メーカー」 🔺

https://thedevs.network/blog/type-coercion-in-javascript-and-why-everyone-gets-it-wrong

0

02.01.2020

Mohan Barman Автор вопроса

.

0

02.01.2020

Simen

Because someone a long time ago thought it would be a good idea, mainly related to if (something). In hindsight, it was a terrible idea. It is quirky, unintuitive, and error prone. It can't be changed because of backward compatibility. Use === instead

0

02.01.2020

Thomas

Don't use +null, or +someVar, use Number(someVar)

0

02.01.2020

Banana

Because null is an object so it gets coerced to a string by == and 'null' !== '0'.

0

03.01.2020

Thomas · Accepted Answer

Thomas

because don't use ==

0

02.01.2020

Похожие чаты

False == 0 // outputs true true == 1 // outputs

6 ответов

Похожие вопросы