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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toString()

toStringni sonlar bilan ishlatganimizda uni base argumentidan foydalanishimiz mumkin base 3 ta qiymat qabul qiladi (2 , 10 ,16 ).

base:
2 bosa ga teng bolsa 2 lik sanoq sistemasiga o'giradi. ( 0 va 1 )

10 bolsa β€” 10 lik sanoq sistemasiga o'giradi ( 0 dan 9 gacha )

16 bolsa β€” (0 dan 9 gacha raqamlar va A dan F gacha belgilar).

@abs_javascript
πŸ‘7❀2
let abs = 123
abs.toString(2)
Anonymous Quiz
66%
1111011
19%
1111012
13%
1111013
2%
1111014
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NaN === NaN
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52%
true
40%
false
4%
null
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error
JavaScript
NaN === NaN
Menga interyuda tushgan savol.)
πŸ“7πŸ‘1
isNaN() πŸ“›

isNaN() - funksiyasi qiymatni NaN ekanligini yani son emasligini tekshiradi.

agar qiymat son bo'lsa falseπŸ‘Ž
agar qiymat Number bo'lmasa true βœ… qiymat qaytaradi.

@abs_javascript
πŸ‘4❀2πŸ₯΄2
isNaN(true)
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true
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false
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0
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error
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Soat 12 bo'lyabdi , uyqu yoq lekin miyyaga , o'qiysanmi? desam , o'qiman degan holatda turibdi πŸ˜€ , soat 3 gacha doc o'qiyman agar yangiroq narsa chiqib qolsa quiz yoki post qilib yozaman.

Agar svet o'chib qolmasa , qishloqdaman hozir πŸ˜…
πŸ‘12😁5
-0 === 0
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true
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false
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null
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0
isNaN(NaN)
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true
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false
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0
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error
isFinite(value)

isFinite(value) - value sini Number ga aylantiradi , agar Number ga aylansa true qaytaradi aks holatda false qaytadi

isFinite("23") => true
isFinite("abs") => false

Bir narsani aytib o'tishim kerak , agar isFinete() ning value si NaN/Infinity/-Infinity bo'lsaham false qiymat qaytadi.

isFinite(NaN) => false
isFinite( Infinity ) => false
(πŸ”₯)

@abs_javascript
πŸ”₯7πŸ‘2
isFinite( 1 + '3' )
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true
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false
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null
isFinite( 1/0 )
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true
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false
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null
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null === null
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true
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false
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0
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window === window
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true
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false
1%
null
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object
parseFloat()

parseFloat() - String ichidan birinchi argumentini o'qiydi va onlik sonni qaytaradi. Agar son bo'lmasa NaN qaytaradi. (πŸ‘)

parseFloat("23px") => 23
parseFloat("uhlasangchi") => NaN
parseFloat("Soat 12.40 bo'ldi") => NaN


@abs_javascript
πŸ‘11😁1
parseFloat(23 + "abs")
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23
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23abs
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true
parseFloat(" soat 1 da uhlayman")
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36%
1
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true
45%
NaN
6%
error
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