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Gregory Krohne krohne

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  • Atlanta, Georgia, USA
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krohne / index.html
Last active September 30, 2015 21:38
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<div class="blue">////////</div>
<script id="jsbin-javascript">
console.log('1. Missing element');
@krohne
krohne / 4-minute-chess-timer.md
Last active August 29, 2015 14:24
4 minute chess timer

A 4 minute Chess (or any 2-player game) timer.

Try it out: http://codepen.io/anon/pen/oXqNoO

TODO:

  • start button to start timer for white player
  • timer.add(seconds) function for Fischer or Bronstein clock.
  • timer.delay(seconds) function for Simple Delay clock
  • Responsive design for tablets and phones
  • Add onClick to timers for touchscreens
@krohne
krohne / parseBooleanStyle.js
Last active August 29, 2015 14:15 — forked from CMCDragonkai/parseBooleanStyle.js
/**
* Parses mixed type values into booleans. This is the same function as filter_var in PHP using boolean validation
* @param {Mixed} value
* @param {Boolean} nullOnFailure = false
* @return {Boolean|Null}
*/
var parseBooleanStyle = function(value, nullOnFailure = false){
if (typeof value !== 'string')
return Boolean(value);
@krohne
krohne / javaStringToJavaScriptPrimitive.js
Created February 4, 2015 22:51
Convert Java String object to JavaScript String primitive in Rhino
// The good part:
// String(javaString).valueOf()
// Follow the same pattern to convert other Java types to corresponding JavaScript primitives
var javaString = new java.lang.String("test");
print('javaString:', javaString);
print('typeof javaString:', typeof javaString); // Object
print('javaString instanceof String:', (javaString instanceof String)); // true (really a java.lang.String object)
print('String(javaString).valueOf() === "test":', String(javaString).valueOf() === "test"); // true: Converted to JS primitive
@krohne
krohne / isEven.js
Created December 29, 2014 19:14
Determine if integer is an even number, using last digit.
function isEven(int) {
var intStr = int.toString(),
lastDigit = intStr.charAt(intStr.length - 1);
return ("02468".indexOf(lastDigit) > -1);
}
@krohne
krohne / evens_no_looping.js
Last active August 29, 2015 14:12
From an array of integers (negative and positive), return the even integers, without looping or using Array API calls
function getIntegers() {
// Go to the source for true random numbers
// Fetch 10 integers from -100 to 100
var xmlHttp = new XMLHttpRequest(),
randomUrl = "http://www.random.org/integer-sets/?sets=1&num=10&min=-100&max=100&commas=on&order=index&format=plain&rnd=new";
xmlHttp.open("GET", randomUrl, false);
xmlHttp.send();
return xmlHttp.responseText.split(", "); // convert to an array