prasad-madhale
/ gist:89ed85a69f54050c42f15a0d65656211
Created
March 9, 2019 23:29
— forked from psayre23/gist:c30a821239f4818b0709
Runtime Complexity of Java Collections
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| Below are the Big O performance of common functions of different Java Collections. | |
| List | Add | Remove | Get | Contains | Next | Data Structure | |
| ---------------------|------|--------|------|----------|------|--------------- | |
| ArrayList | O(1) | O(n) | O(1) | O(n) | O(1) | Array | |
| LinkedList | O(1) | O(1) | O(n) | O(n) | O(1) | Linked List | |
| CopyOnWriteArrayList | O(n) | O(n) | O(1) | O(n) | O(1) | Array |
prasad-madhale
/ q.py
Created
September 24, 2018 03:57
— forked from fheisler/q.py
Q-learning Tic-tac-toe
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| import random | |
| class TicTacToe: | |
| def __init__(self, playerX, playerO): | |
| self.board = [' ']*9 | |
| self.playerX, self.playerO = playerX, playerO | |
| self.playerX_turn = random.choice([True, False]) | |
| def play_game(self): |
prasad-madhale
/ strassenExample.groovy
Created
February 25, 2018 21:48
— forked from phillco/strassenExample.groovy
Example step-through of Strassen's method for matrix multiplication on 2x2 matrices
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| /* MULTIPLIES A and B ============= | |
| using Strassen's O(n^2.81) method | |
| A = [1 3] B = [6 8] | |
| [7 5] [4 2] | |
| C = A * B = ? | |
| =================================*/ | |
| // Step 1: Split A and B into half-sized matrices of size 1x1 (scalars). |