jlschrag

I recently had need for a C++ collection which could be accessed with multiple keys. Specifically, I had an object that I wanted to look up either by name or id (in O(1) time). One way to do this is to create two unordered_maps – one keyed by id and another by name, but that is error-prone. I ended up finding a boost class which will do this. It took me a while get it working, so I thought I would share the result.

jlschrag

#define's in C++ code are a terrible way to define collections, but they are commonplace in legacy code. After a few years of refining my approach, this is what I have come up with to replace them.

jlschrag

cmake_minimum_required(VERSION 3.13) #3.13 was what I had on my WSL install.

project(SharedLib VERSION 0)
add_library(SharedLib SHARED "")
set_target_properties(SharedLib PROPERTIES VERSION ${PROJECT_VERSION})
set_target_properties(SharedLib PROPERTIES SOVERSION 1) #API Version

target_sources(SharedLib
    PUBLIC
        SharedLib.h

jlschrag

cmake_minimum_required(VERSION 3.13) #3.13 was what I had on my WSL install.

project(SharedLib VERSION 0)
add_library(SharedLib SHARED "")
set_target_properties(SharedLib PROPERTIES VERSION ${PROJECT_VERSION})
set_target_properties(SharedLib PROPERTIES SOVERSION 1) #API Version

target_sources(SharedLib
    PUBLIC
        SharedLib.h

jlschrag

auto resort = ExternalInterface_GetSkiResort("Tahoe");
auto blackRuns = resort.GetRunsByDifficulty(resort.Resort, SkiRunDifficultyRating::Black);

//Process the runs list

resort.Destroy(resort.Resort);
blackRuns.Destroy(blackRuns.Collection);

jlschrag

$val = (Get-ItemProperty -path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize').AppsUseLightTheme
$newval = -Not $val
Set-ItemProperty -Path HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize -Name AppsUseLightTheme -Value $newval
Set-ItemProperty -Path HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize -Name SystemUsesLightTheme -Value $newval

jlschrag

void BetterApproach()
{
	{
		shared_ptr<TooManyResponsibilities> root(new TooManyResponsibilities());

		{
			shared_ptr<Responsibility1> first = static_pointer_cast<Responsibility1>(root);

			{
				shared_ptr<Responsibility2> second = static_pointer_cast<Responsibility2>(root);

jlschrag

username=myusername
password=mysupersecretpassword