KristofferK’s gists

KristofferK / InBetween.cs

Created February 11, 2018 12:19

Gets the substring inbetween two other substrings. InBetween("Hello beautiful world", "Hello ", " world") => "beautiful"

	namespace Utils
	{
	public static class Util
	{
	public static string InBetween(string haystack, string afterThis, string beforeThis)
	{
	return InBetween(haystack, afterThis, beforeThis, 1, 0);
	}

	public static string InBetween(string haystack, string afterThis, string beforeThis,

KristofferK / UpperWords.cs

Created February 11, 2018 12:17

Capitalizes words. "hello world" => "Hello World"

	namespace Utils
	{
	public static class Util
	{
	public static string UpperFirstChar(string s)
	{
	if (s == null) return null;
	if (s.Length == 1) return s.ToUpper();
	if (s.Length > 1) return char.ToUpper(s[0]) + s.Substring(1);
	return s;

KristofferK / GetFirstMatch.cs

Created February 11, 2018 12:16

Runs a regex on a string. Will return the first match.

	namespace Utils
	{
	public static class Util
	{
	public static string GetFirstMatch(string pattern, string s, int index, bool removeDots = false)
	{
	if (s == null) return null;
	Regex regex = new Regex(pattern);
	Match m = regex.Match(s);
	while (m.Success)

KristofferK / StripTags.cs

Last active February 11, 2018 12:14

Converts a html string to a text string.

	namespace Utils
	{
	public static class Util
	{
	public static string StripTags(object o, bool keepLinebreaks = false)
	{
	if (o == null) return null;
	string s = o.ToString();
	if (keepLinebreaks)
	{

KristofferK / generateToken.php

Created February 11, 2018 00:32

	<?PHP
	function generateToken($s) {
	for ($i = 0; $i < 1000 + strlen($s) * 17; $i++) {
	$s = hash_hmac('sha256', $s, 'Token #'.((7919+$i)/17).'static salt!');
	}
	return $s;
	}
	?>

KristofferK / checkIfArrayHasNValuesOfSameDataTypeCohesively_oneLiner.js

Last active February 11, 2018 00:27

Checks if a given array has multiple items of the same data type next to each other. In the test code it checks if a given array has three numbers cohesively. Using reducer and only one line

	const array1 = [1,2,'a',3,'b',4,5]
	const array2 = [1,2,'a',3,'b',4,5,6,'k']

	const checkIfArrayHasNValuesOfSameDataTypeCohesively = datatype => n => array => (array.reduce((acc, val) => (
	{passed: acc.passed \|\| (acc.n = typeof val != datatype ? 0 : acc.n + 1) >= n, n: acc.n}
	), {n: 0, passed: false})).passed;

	const hasThreeNumbersCohesively = checkIfArrayHasNValuesOfSameDataTypeCohesively('number')(3);
	console.log(hasThreeNumbersCohesively(array1)); // false
	console.log(hasThreeNumbersCohesively(array2)); // true

KristofferK / checkIfArrayHasNValuesOfSameDataTypeCohesively2.js

Created February 10, 2018 21:53

Checks if a given array has multiple items of the same data type next to each other. In the test code it checks if a given array has three numbers cohesively. This time using array.reduce

	const array1 = [1,2,'a',3,'b',4,5]
	const array2 = [1,2,'a',3,'b',4,5,6,'k']

	const checkIfArrayHasNValuesOfSameDataTypeCohesively = datatype => n => array => (array.reduce((acc, val) => {
	if ((acc.n = typeof val != datatype ? 0 : acc.n + 1) >= n) acc.passed = true;
	return acc;
	}, {n: 0, passed: false})).passed;

	console.log(checkIfArrayHasNValuesOfSameDataTypeCohesively('number')(3)(array1)); // false
	console.log(checkIfArrayHasNValuesOfSameDataTypeCohesively('number')(3)(array2)); // true

KristofferK / checkIfArrayHasNValuesOfSameDataTypeCohesively.js

Last active February 10, 2018 21:52

Checks if a given array has multiple items of the same data type next to each other. In the test code it checks if a given array has three numbers cohesively.

	let array1 = [1,2,'a',3,'b',4,5]
	let array2 = [1,2,'a',3,'b',4,5,6,'k']

	const checkIfArrayHasNValuesOfSameDataTypeCohesively = datatype => n => array => {
	let _n = 0;
	for (let i = 0; i < array.length; i++) {
	if (typeof array[i] == datatype) {
	if (++_n >= n) return true;
	}
	else {

KristofferK / GetPalindromePermutation.cs

Last active February 4, 2018 19:59

Attempts to get a permutation p of the string s, where p is a palindrome

	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	using System.Threading.Tasks;

	namespace PermutationOfPalindrome
	{
	class Program
	{

KristofferK / IsPermutationOfPalindrome.cs

Last active February 4, 2018 19:47

Checks if a string is a permutation of a palindrome. Solution-idea from https://medium.com/algorithms-practice/given-a-string-check-if-it-is-a-permutation-of-a-palindrome-e0469f47761d

	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	using System.Threading.Tasks;

	namespace PermutationOfPalindrome
	{
	class Program
	{

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