JavaScript
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About JavaScript 🌵
Interyu savollar va Test yechish uchun website imiz: javascript-savollar.uz

Men yozgan va aytganlarimga 100% ishonmang , chunki men ham siz kabi haliham o'rganyabman.

Blog: @abdulvahob_blog

Bog'lanish uchun: @A_Abdulvahob
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JavaScript
Photo
Bu jarayonni alohida post qilmoqchi edim lekin 1,2 ta quiz test yechib tushunib olsa bo'ladi ekan. 🔥
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JavaScript
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console.log() ga nima chiqadi ?
Anonymous Quiz
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javascript
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abs
11%
error
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null
JavaScript
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console.log() nima chiqadi ?
Anonymous Quiz
14%
null
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undefined
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error
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abs
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JavaScript
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console.log() ga nima chiqadi ?
Anonymous Quiz
21%
null
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undefined
28%
abs
6%
error
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JavaScript
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consol.log() ga nima chiqadi ?
Anonymous Quiz
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true
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false
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error
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{}
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null > null
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true
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JavaScript
"good morning" || true
Bugun 10 ta Qiziqarli quiz test berildi. Kim nechta topdi.💥
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Symbol

Stybol - Ichidagi ma'lumotlar bir xil bo'lsa ham, bir-biriga teng bo'lmagan qiymatlarni yaratish uchun ishlatiladi.

Symbol - JavaScriptda faqatgina referens identifikator (nom)ga ega bo'lgan yagona primitiv qiymat turidir.

Symbol qiymat yaratish uchun Symbol() funksiyasini ishlatamiz.

@abs_javascript
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Symbol('good night') == Symbol('good night')
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true
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fasle
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object
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typeof null
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object
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string
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typeof Symbol("abs")
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object
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Global Symbol

Agar biz Global Symbol holatdagi Symbol yaratmoqchi bo'lsak Symbol.for() dan foydalanamiz.

Odatda Symbollar bir hil nomga ega bo'lsaham , har hil bo'ladi. Lekin bazida bir hil nomdagi Stybollar bir hil qiymat qaytarishini hohlaymiz va bunday stybolni yaratish uchun Symbol.for() dan foydalanamiz va bu turdagi stybollarni Global Symbol deb ataladi.

@abs_javascript
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Symbol.for("abs") == Symbol.for("abs")
Anonymous Quiz
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true
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false
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Symbol.for("abs") === Symbol.for("abs")
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false
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valueOf()

valueOf() - methodi objectni asosiy qiymatini qaytarib beruvchi method.

Bu metod obyektni asosiy qiymatini (primitive value) qaytaradi.

@abs_javascript
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Bu holatimizdaham valueOf() ishlayabdi.💆‍♂️

Qanday 😳

JavScript automatik ravishda valueOf() methodini chaqiradi.🔥

@abs_javascript
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