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@rjlutz
rjlutz / HexagonalRing.pde
Created May 30, 2019
HexagonalRing Class for Shapes_Practice_Coding_Challenge
View HexagonalRing.pde
public class HexagonalRing extends Shape {
float sInner;
float sOuter;
HexagonalRing(float a, float b, float c, float d) {
// super(); // this happens, silently, even if omitted
x = a;
y = b;
sInner = c;
@rjlutz
rjlutz / DiceNotation.java
Created Feb 25, 2019
Class to Perform Creation of Die Set
View DiceNotation.java
package edu.ggc.lutz.dungeonmasterdiceroller;
// adapted from:
// https://stackoverflow.com/questions/35020687/how-to-parse-dice-notation-with-a-java-regular-expression
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class DiceNotation {
@rjlutz
rjlutz / generate-images.script
Last active Jan 19, 2019
Automate JMol to created multiple 2d images through looping
View generate-images.script
# script to systematically create many images of molecular structures
# R Lutz 19 Jan 2019
set antialiasImages FALSE # the following is recommended to avoid ragged
# edges around the image, per JMol docs
# ====================================================================
# CONFIGURABLE PARAMS
var rot_max = 2.0 # in degrees
var output_width = 600 # shouldn't be > 600, according to automl guidance
@rjlutz
rjlutz / detect.py
Last active Jan 17, 2019
Starter code and data files for neural net / python practice assignment
View detect.py
## modified from:
## https://github.com/miloharper/simple-neural-network and
## https://medium.com/technology-invention-and-more/how-to-build-a-simple-neural-network-in-9-lines-of-python-code-cc8f23647ca1
## thanks!
import csv
from numpy import exp, array, random, dot
class NeuralNetwork():
def __init__(self):
@rjlutz
rjlutz / CircleWithException.java
Last active Nov 21, 2018
Exceptions and File I/O (Chapter 12) -- examples from Liang Intro to Java Comprehensive 10e
View CircleWithException.java
public class CircleWithException {
/** The radius of the circle */
private double radius;
/** The number of the objects created */
private static int numberOfObjects = 0;
/** Construct a circle with radius 1 */
public CircleWithException() {
this(1.0);
@rjlutz
rjlutz / storage.dart
Last active Nov 13, 2018
helpful artifacts for the flutter student picker app
View storage.dart
// thanks - https://flutter.io/docs/cookbook/persistence/reading-writing-files
import 'dart:async';
import 'dart:io';
import 'package:path_provider/path_provider.dart';
import 'student.dart';
class Storage {
Future<String> get _localPath async {
final directory = await getApplicationDocumentsDirectory();
@rjlutz
rjlutz / Basic steps
Last active Oct 8, 2018
Including a SettingsActivity in your Android Studio Project
View Basic steps
1 - Use existing Android Studio project or create a new project. If new, start with a Basic Activity so that the Settings pulldown is available under the Options menu.
2 - It might be good to test deploy to make sure everyting is working ok.
3 - Create a new SettingsActivity. File -> New -> Activity -> SettingsActivity
4 - Link the new Activity to the Options menu. Navigate to app -> java -> <<your package>> -> MainActivity.java and add the following to onOptionsItemSelected():
@Override
public boolean onOptionsItemSelected(MenuItem item) {
View Categories.java
package package <<YOUR PACKAGE HERE>>;
import java.util.HashMap;
public class Categories extends HashMap<String, String> {
public Categories() {
put("Home","home");
put("Opinion", "opinion");
put("World", "world");
@rjlutz
rjlutz / Palindrome Utility
Last active Aug 15, 2018
Bits to build a palindrome app, class with static method that tests a string to see if its a palindrome
View Palindrome Utility
public class Palindrome {
public static boolean check(String _s) {
return check(_s, 0, _s.length()-1);
}
private static boolean check(String _s, int _start, int _end) {
// base case
if (_start >= _end) return true;
@rjlutz
rjlutz / main.dart
Created Jun 10, 2018
template for porting Palindrome.java to dart
View main.dart
// refer to the Java code here:
// https://gist.github.com/rjlutz/3c26a1be877529de8dd28049d12415d0
// complete the dart implementation below to have the same functionality
class Palindrome {
// TODO implement check
static check(String s) {
return true;
}
}
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