#coding practice

[thesevenumbrellas]

Practicing my coding so I created a whale speak translator.

"I cried in a room for 25 years and I didn’t get a single hug from either of you."

is

IEEIAOOOEEAAIEEAIEEUUOEEIEEOOUU

if you were wondering

[blackprogramming]

Interview Practice Problem #1: Strings

Problem Description: 

Given a string s, find and return the first instance of a non-repeating character in it. If there is no such character, return '_'.

Example:

For s = "abacabad", the output should be firstNotRepeatingCharacter(s) = 'c'. There are 2 non-repeating characters in the string: 'c' and 'd'. Return c since it appears in the string first.

Try solving the problem first before looking at my problem analysis & solution!

Problem Analysis:

The first thing that I try to do when I look at a problem is see if there is a corresponding data structure that can get me closer to the solution. 

Bells starting ringing for me when I read “first non-repeating character.” To me, that meant that a set** could be useful because, ultimately, we are not looking for non-unique characters.

**In case you are not aware, a set is a data structure that holds unique items. For example, if the series of numbers [2, 3, 4, 4, 1, 2] were inserted into a set, the set would contain [2, 3, 4, 1]. 

On second glance, if the duplicates did not exist in the string, it would be hard to determine which character(s) is NOT repeating. Therefore, I decided to work within the existing string and use string methods to construct a solution. 

Here is the final solution + explanations on GitHub.

Do you have another (or even better) way to solve this problem? Let me know!

[mtul-c]

Sample Program for Declaration Reading

This a sample program to demonstrate the use of various declarations that are used. There are indeed many more that are used based on given situation, but these are references on how few of them are used. #include <stdio.h> #include <stdlib.h> int my_add(int a, int b) { return a + b; } int my_sub(int a, int b) { return a - b; } int my_mul(int a, int b) { return a * b; } int my_div(int a, int b)…

View On WordPress

[beccasmith]

How to Learn to Code: A U.S. News Guide

Learn to code online using courses, practice lessons, community guidance and a lot of tinkering.

IF YOU THINK ABOUT HOW websites, mobile apps or any software programs are developed, coding is almost definitely involved. That’s why it can be valuable to learn how to code. Coding communicates instructions to computers through languages that they understand. There are many paths you can take to learn coding, depending in large part on your goals.

[blackprogramming]

Coding Interview Question: Rotate Image

You are given an n x n 2D matrix representing an image.

Rotate the image by 90 degrees (clockwise).

Note: You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the rotation.

Example 1:

Given input matrix = [  [1,2,3],  [4,5,6],  [7,8,9] ], rotate the input matrix in-place such that it becomes: [  [7,4,1],  [8,5,2],  [9,6,3] ]

Example 2:

Given input matrix = [  [ 5, 1, 9,11],  [ 2, 4, 8,10],  [13, 3, 6, 7],  [15,14,12,16] ], rotate the input matrix in-place such that it becomes: [  [15,13, 2, 5],  [14, 3, 4, 1],  [12, 6, 8, 9],  [16, 7,10,11] ]

--------------

Alright, y’all -- let me be real with you. I have been staring at this question for about an hour and a half, and I’ve got nothing. I took a look at a couple of solutions to understand the best approach to rotating the image in place, but they go over my head. Maybe my brain is just fried.

Here’s the best solution that I’ve found so far: 

I’m not currently near paper or pen at the moment to walk myself through it line by line, so, once I understand what she’s proposed, I will type up her solution in Python, upload it to GitHub, and edit this post to share with you!

If you have any idea of how to go about this, I’d love to hear it!

[th3pun1sh3rx0]

Start Coding Today - GeeksforGeeks Practice [BETA]

practice.geeksforgeeks.org

[heir-to-the-diamond-throne]

I was practicing coding in Scratch and I think I accidentally made the start of an EOS10 visual novel game??? I should stop.

[geminstallmichael]

Non-blocking I/O gaming magic

I've gone mad with power. Thanks to investigating every single comment and answer to this Stack Overflow post and combining key features of a couple answers, I have assembled a single Ruby method that handles nonblocking, carriage-return-free i/o beautifully for realtime little scripted games. BEHOLD:

require 'io/wait'

def char_if_pressed   begin     state = `stty -g` #turn raw input on     system `stty raw -echo -icanon isig`     c = nil if $stdin.ready?     c = $stdin.getc   end     c.chr if c   ensure     system `stty #{state}` # turn raw input off and                              #restore state   end end

So glorious for this baby Rubyist here. Only problems: it still seems to be iffy on whether echo is actually suppressed. Oh well. Open to suggestions. Till then, Tetris is coming together even cooler than I thought.