🔀 Shuffle a List in JavaScript and Python
You can build
👉 your own shuffled playlist like in Spotify
👉 a game of cards
👉 a lottery picker app
👉 and what not
How? 🧵 👇
You can build
👉 your own shuffled playlist like in Spotify
👉 a game of cards
👉 a lottery picker app
👉 and what not
How? 🧵 👇
1️⃣ What is Shuffle?
✪ Shuffle is like sorting where it reorders the original list of elements.
✪ But unlike sorting, shuffle doesn't define any specific rule how to order these elements. Output is always non-predictive.
✪ Shuffle is like sorting where it reorders the original list of elements.
✪ But unlike sorting, shuffle doesn't define any specific rule how to order these elements. Output is always non-predictive.
2️⃣ How does Shuffle work?
✪ As output is non-predictive, hence there is some randomness.
✪ So the algorithm we will write need to have randomness included.
✪ As output is non-predictive, hence there is some randomness.
✪ So the algorithm we will write need to have randomness included.
3️⃣ Shuffle in JavaScript
✪ Use Array.prototype.sort() which accepts a "comparator function"
✪ Comparator function takes any 2 elements from array and sorting order is defined by its output if positive or, negative or, 0.
See the shuffle technique 👇
✪ Use Array.prototype.sort() which accepts a "comparator function"
✪ Comparator function takes any 2 elements from array and sorting order is defined by its output if positive or, negative or, 0.
See the shuffle technique 👇
✪ Math.random() returns a random floating point value between 0 and 1.
✪ So, Math.random() - 0.5 always returns a value in the range of -0.5 to 0.5
✪ So, Math.random() - 0.5 always returns a value in the range of -0.5 to 0.5
4️⃣ Shuffle in Python
Python in its "random" library provides this inbuilt function "shuffle" which in-place shuffles the list.
Python in its "random" library provides this inbuilt function "shuffle" which in-place shuffles the list.
5️⃣ Final
There are many other shuffling techniques. E.g., "Fisher–Yates Shuffle Algorithm".
How do you prefer to implement shuffling in your application? Reply in the comments.
Share your feedbacks as well. Till we see again, 👋
There are many other shuffling techniques. E.g., "Fisher–Yates Shuffle Algorithm".
How do you prefer to implement shuffling in your application? Reply in the comments.
Share your feedbacks as well. Till we see again, 👋
And, if you are a React developer or aspiring to be, check the 👇 🧵
https://twitter.com/swapnakpanda/status/1455011729880936451
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