dgroft’s gists

dgroft / Math.cs

Created November 6, 2012 14:11

Determine if two floats are "equal"

	using System.Linq;

	public static class Math
	{
	/// <summary>
	/// Floating-point epsilon value.
	/// </summary>
	public const float FLT_EPSILON = 1.192092896e-07f;

	/// <summary>

dgroft / MyImmutableObject.cs

Created November 8, 2012 20:59

A constructor for immutable types that takes a dynamic list of parameters

	protected MyImmutableObject(IDictionary<string, object> parameters)
	{
	foreach (var field in GetType().GetFields().Where(x => parameters.Keys.Contains(x.Name)))
	{
	if (parameters[field.Name] is Dictionary<string, object>)
	{
	var ctor = field.FieldType.GetConstructor(new[] { typeof(Dictionary<string, object>) });
	var instance = ctor.Invoke(new object[] { parameters[field.Name] });
	field.SetValue(this, instance);
	}

dgroft / ImmutableDataObject.cs

Created November 14, 2012 18:53

Immutable object base class

	using System.Linq;

	public abstract class DataObject
	{
	public override bool Equals(object obj)
	{
	var dataObj = obj as DataObject;

	if (dataObj == null) return false;

dgroft / CSVtoXML.cs

Last active December 3, 2020 14:46

Convert CSV to XML in C#

	string csvPath = "...";
	string xmlPath = "...";

	using (StreamReader streamReader = new StreamReader(new FileStream(csvPath, FileMode.Open)))
	{
	// snag headers
	string[] headers = streamReader.ReadLine().Split(',');

	// col0="{0}" col1="{1}" coln="{n}"
	string attributesFormat = string.Join(" ", headers.Select((colStr, colIdx) => string.Format("{0}=\"{{{1}}}\"", colStr, colIdx)));

dgroft / csvtoxml.py

Last active December 18, 2015 05:38

Converts CSV to XML in Python.

	import argparse
	import csv

	parser = argparse.ArgumentParser(description="Converts a CSV file to an XML file")
	parser.add_argument("csv", help="the path to the .CSV file")
	parser.add_argument("xml", help="the path to the .XML file")
	parser.add_argument("--root", help="root tag name", default="root")
	parser.add_argument("--row", help="row tag name", default="row")
	parser.add_argument("-v", "--verbose", help="increase output verbosity", action="store_true")
	args = parser.parse_args()

dgroft / GetPermutations.cs

Created June 25, 2013 16:50

Finds all permutations of a supplied list of generic values.

	private static List<List<T>> GetPermutations<T>(List<T> values)
	{
	if (values.Count <= 1) return new List<List<T>>() { values };

	var results = new List<List<T>>();

	var perms = GetPermutations(values.Skip(1).ToList());

	foreach (var perm in perms)
	{

dgroft / maxsumnonadjacent.py

Last active December 19, 2015 08:19

Maximize the sum of a given collection such that if you include the number in sum, you may not use adjacent numbers toward the sum. For the collection [1, 5, 3, 9, 4], the max sum is 5 + 9 = 14. For the collection [1, 2, 3, 4, 5], the max sum is 1 + 3 + 5 = 9. For the collection [1, 3, 5, -1, 12, 6, 7, 11], the max sum is 1 + 5 + 12 + 11 = 29.

	from __future__ import print_function
	import heapq

	# construct initial collection
	initial_col = [1, 5, 3, 9, 4]

	# construct heap
	heap = []

	# assemble the heap, store tuples as such: (original_value, original_index)

dgroft / ParseEnum.cs

Created July 8, 2013 15:08

Parsing an enum.

	enum DaysOfTheWeek { Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday };

	var tues = (DaysOfTheWeek)Enum.Parse(typeof(DaysOfTheWeek), "Tuesday");

dgroft / redis-centos.sh

Created July 30, 2013 20:31

Installs Redis on CentOS.

	#!/bin/bash
	################################################################################
	# Installing Redis on CentOS
	# with lots of help from:
	# * https://gist.github.com/coder4web/5762999
	# * http://www.codingsteps.com/install-redis-2-6-on-amazon-ec2-linux-ami-or-centos/
	# * https://coderwall.com/p/ypo94q
	# * https://raw.github.com/gist/257849/9f1e627e0b7dbe68882fa2b7bdb1b2b263522004/redis-server
	################################################################################

dgroft / launch_sln.bat

Last active December 21, 2015 18:19

Launching Visual Studio 2008 with temporary environment variables and temporarily appending to PATH.

	' invoke vsvars32.bat. just do it.
	call "C:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\vsvars32.bat"

	' temporary environment variables assignment
	' set ENV_VAR = value

	' temporary path modification
	set path=%path%;C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE

	' launch visual studio

Dan Groft dgroft