<code>If-else</code> yoki <code>match-case</code> yozishdan imkon qadar qochishga harakat qilaman. Sababini keyingi postlarda albatta yozib o'taman. Ho'sh uni o'rniga nima yozish kerak deysizmi?
<img src="https://telegra.ph/file/444265b97572e2cd4c9ef.jpg" alt="">
Albatta vaziyatga qarayman ammo menda uchragan ko'p muammolarni hashmap orqali yechganman. Tasavvur qiling qiymatlar aniq yoki cheklangan muammo bor.
Uni <code>if-else</code> yozmasdan yechishingiz kerak. Misol uchun, agar son 2ga bo'linsa "toq", bo'linmasa "juft" degan yozuvni ekranga chiqaring deyildi, xo'sh nima qilasiz?
Men mana bunday qilardim:
<pre><code class="language-python">hashmap = {
	0: "juft"
}

number = int(input("Raqamni kiriting: "))
hashmap.get(number % 2, "toq")
</code></pre>
Hop yaxshi muammoni biroz qiyinlashtiramiz. Foydalanuvchi uchun pulni konvertatsiya qiladigan tizim yaratayabsiz. Foydalanuvchi amount, from va to ni kiritadi siz esa <code>if-else</code> yozmasdan uni to'g'ri xisoblashingiz kerak.
Misol uchun siz bergan ma'lumotlar:
<pre><code class="language-bash">Amount : 24
From : USD
To: UZS
</code></pre>
Siz endi $24 ni O'zbek so'miga o'girishingiz kerak, xo'sh buni qanday qilasiz?
Meni yechimim:
<pre><code class="language-python"># Valyutalarni 1$ bo'lgan bahosini saqlaymiz
currencies = {
	"USD": 1,
	"UZS": 11300,
	"RUB": 90,
	"EUR": 0.85,
}

# Xisoblash uchun
convert = {
	"TO_USD": lambda amount, rate: amount / rate,
	"FROM_USD": lambda amount, rate: amount * rate,
}

# User input qismini yozamiz
amount = float(input("Amount: "))
from_currency = input("From: ").upper()
to_currency = input("To: ").upper()

# Istalgan pul birligini USD orqali boshqa birlikka o'giramiz.
# Misol uchun UZS -> RUB ni to'g'ridan to'g'ri emas balki UZS -> USD keyin USD -> RUB
in_usd = convert["TO_USD"](amount, currencies[from_currency])

# Endi USDga o'girilgan qiymatni foydalanuvchi xohlagan qiymatga o'giramiz
result = convert["FROM_USD"](in_usd, currencies[to_currency])

print(result)
</code></pre>
<img src="https://media2.giphy.com/media/l4FB49aNstvAcSBQ4/giphy.gif?cid=6c09b9525m3ww55i9mnf6k5zfqgfoyg3mznoov3u6mpyocku&#x26;ep=v1_gifs_search&#x26;rid=giphy.gif&#x26;ct=g" alt="">
Shunday dangasa yechimlar haqida ham o'ylab ko'ring, foydali bo'lgan bo'lsa xursandman!

`If-else` or `match-case` statements are something I try to avoid whenever possible. I'll explain why in upcoming posts. So, what should you write instead?

Dangasa yechimlar

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