Using WordList as txt file and using LoadFile

Salim · July 2, 2020, 6:40pm

i used the txt file and LoadFile and loaded word to member variable WordList then used RemoveAll() to removed non-isogram function. I also used a random function to select a word from the WordList array to setup the HiddenWord .Here are some partial parts ;

void UBullCowCartridge::BeginPlay() // When the game starts
{
    Super::BeginPlay();
    const FString WordListhPath=FPaths::ProjectContentDir() / TEXT("WordList/WordList.txt");
    FFileHelper::LoadFileToStringArray(WordList, *WordListhPath);
    WordList.RemoveAll([this](auto& word) {return IsIsogram(word); });
    SetupGame();
    PrintLine(TEXT("Hidden Word List has %i"), WordList.Num());  
}

Here 's the SetUpGame()

void UBullCowCartridge::SetupGame()
{
    // welcome message
    PrintLine(TEXT("Welcome to BULLCOW GAME"));

    //HiddenWord = TEXT("unreal");
    HiddenWord = WordList[FMath::RandHelper(WordList.Num())];
    Lives = HiddenWord.Len();
    bGameOver = false;

    PrintLine(TEXT("Guess the %i letter hidden word"), HiddenWord.Len());
    PrintLine(TEXT("You have %i lives"), HiddenWord.Len());
    PrintLine(TEXT("Type your guess \nPress enter to continue..."));
}

Here is also my IsIsogram() function; i used a FString member function FindLastChar();

bool UBullCowCartridge::IsIsogram(const FString& Guess) const
{
    int32 Position{0};
    for(int32 Index=0; Index<Guess.Len(); ++Index) 
    {
        Guess.FindLastChar(Guess[Index], Position);
        if(Position != Index) return true;
    }
     
    return false;
}

DanM · July 2, 2020, 6:48pm

Pretty nifty though unless you’re IsIsogram does the opposite you are missing a ! in your predicate.

This is actually how I was doing it but didn’t like that it was allocating a (possibly) large amount of data just to throw it away so that’s why I added the WithPredicate version of LoadFileToStringArray.
At the time Unreal didn’t have a string view class so couldn’t really do away with allocating the strings unfortunately .

Salim · July 2, 2020, 11:01pm

yes my IsIsogram is the opposite of the class…
and thanks I did not know LoadFileStringArray has predicate option …that is cool

and yes to string_view , I tried that earlier for a better function…maybe we could ask Unreal to add on their GitHub site or maybe try to add our local copy of the engine with some guidance from Unreal…
or we can just call Data() function of FString and write some helper function that almost works as a string_view . it is actually a const char* and and also stores the size / length…maybe unreal has a type like that already because game engines were using that type of constructs earlier…

DanM · July 3, 2020, 9:56am

Then I suggest you rename it to accurately describe what it does.

It does now in 4.25 unsurprisingly called FStringView, but it didn’t at the time I made the PR.

Salim · July 3, 2020, 12:14pm

I see somehow in my Isogram meaning repeating repeating words I will revise the true and false statements in the finction and add ! to whereever i have IsIsogram()

Thanks for reminding… And thanks for 4.25 info i will probably download that version Probably they just implemented similar Member function instead of adding Stl library

I will revise my code and post later.
I was wondering i should install 4.25 amd rhen delete my 4.22 version Hopefully it wont break anythng here

Salim · July 3, 2020, 3:43pm

i revised the code revised Isogram but i could find predicate version LoadFileToStringArray() . there is only this;
bool FFileHelper::LoadFileToStringArray( TArray<FString>& Result, const TCHAR* Filename, EHashOptions VerifyFlags )

EHashOptions is for async task to verify the hash; (??) but this is not the predicate version

enum class EHashOptions
{
	None                =0,
	/** Enable the async task for verifying the hash for the file being loaded */
	EnableVerify		=1<<0,
	/** A missing hash entry should trigger an error */
	ErrorMissingHash	=1<<1
};

Here is my revised BeginPlay();

void UBullCowCartridge::BeginPlay() // When the game starts
{
    Super::BeginPlay();
    const FString WordListhPath=FPaths::ProjectContentDir() / TEXT("WordList/WordList.txt");
    FFileHelper::LoadFileToStringArray(WordList, *WordListhPath);
    WordList.RemoveAll([this](auto& word) {return !IsIsogram(word); });
    SetupGame();
    PrintLine(TEXT("Hidden Word List has %i"), WordList.Num());  
}

DanM · July 3, 2020, 4:34pm

It was added in 4.25

Salim · July 3, 2020, 6:47pm

i just saw there is even a section in class…i just installed 4.25 …will that be ok if i open this project with 4.25 do you think…it looks like heavier engine but early to say when first installed i did a sample project with ray tracing enable…it seems working ok… now …i will test couple of days if it goes ok then i will switch…my desktop wont have problem probably…although my laptop has rtx2060 with 16gb ram MSI gaming setup…so it should be ok i guess…

Salim · July 3, 2020, 9:27pm

i switched 4.25 …and i opened the project with 4.25 .at the beginning it gave me some errors…i rebuild the project within Unreal engine and compiled and tested the function and also revised the BeginPlay() implemented the predicate version;

FFileHelper::LoadFileToStringArrayWithPredicate(WordList, *WordListhPath, [this](const auto& word) {return IsIsogram(word); });

thnk you so much…saved so much resource. But it was kinda all these error messages due to switching engine revisions when first setting the project…finally everything works stable so far
thnk you so much

void UBullCowCartridge::BeginPlay() // When the game starts
{
    Super::BeginPlay();
    const FString WordListhPath=FPaths::ProjectContentDir() / TEXT("WordList/WordList.txt");
    //FFileHelper::LoadFileToStringArray(WordList, *WordListhPath);
    FFileHelper::LoadFileToStringArrayWithPredicate(WordList, *WordListhPath, [this](const auto& word) {return IsIsogram(word); });
    //WordList.RemoveAll([this](auto& word) {return !IsIsogram(word);});
    SetupGame();
    PrintLine(TEXT("Hidden Word List has %i"), WordList.Num());  
}

Salim · July 6, 2020, 7:26pm

hi Dan
Recently i have been experiencing slower compile times when i make a change to code in 4.25.

there was a similar issue with 4.22 which was caused by unnecessary reflection calcs and was resolved by opening UEEditorHeaderTool.target file and making a small space change and saving…

but 4.25 is not giving an error like that.
Normally it compiles under 2 seconds but when i just a comment line //
then the compile time goes to 69 seconds way way to high
here is my output from message log
Using ‘git status’ to determine working set for adaptive non-unity build (C:\Developer\unreal_class\BullCowGame-starter-kit).
Building BullCowGameEditor…
Using Visual Studio 2019 14.26.28806 toolchain (C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801) and Windows 10.0.18362.0 SDK (C:\Program Files (x86)\Windows Kits\10).
[Upgrade]
[Upgrade] Using backward-compatible build settings. The latest version of UE4 sets the following values by default, which may require code changes:
[Upgrade] bLegacyPublicIncludePaths = false => Omits subfolders from public include paths to reduce compiler command line length. (Previously: true).
[Upgrade] ShadowVariableWarningLevel = WarningLevel.Error => Treats shadowed variable warnings as errors. (Previously: WarningLevel.Warning).
[Upgrade] PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs => Set in build.cs files to enables IWYU-style PCH model. See https://docs.unrealengine.com/en-US/Programming/BuildTools/UnrealBuildTool/IWYU/index.html. (Previously: PCHUsageMode.UseSharedPCHs).
[Upgrade] Suppress this message by setting ‘DefaultBuildSettings = BuildSettingsVersion.V2;’ in BullCowGameEditor.Target.cs, and explicitly overriding settings that differ from the new defaults.
[Upgrade]
Distributing 4 actions to XGE
--------------------Build System Warning---------------------------------------
Temporary license has expired:
Your Agent’s temporary license has expired. IncrediBuild will allow you to utilize up to 16 cores on your local machine.
To unleash IncrediBuild’s capabilities to utilize idle cores in your network in order to achieve increased performance, please contact sales@incredibuild.com

--------------------Project: Default-------------------------------------------
BullCowCartridge.cpp (1:02.87 at +0:00)
UE4Editor-BullCowGame-0399.lib (0:00.11 at +1:02)
Creating library C:\Developer\unreal_class\BullCowGame-starter-kit\Intermediate\Build\Win64\UE4Editor\Development\BullCowGame\UE4Editor-BullCowGame-0399.lib and object C:\Developer\unreal_class\BullCowGame-starter-kit\Intermediate\Build\Win64\UE4Editor\Development\BullCowGame\UE4Editor-BullCowGame-0399.exp
UE4Editor-BullCowGame-0399.dll (0:00.61 at +1:02)
Creating library C:\Developer\unreal_class\BullCowGame-starter-kit\Intermediate\Build\Win64\UE4Editor\Development\BullCowGame\UE4Editor-BullCowGame-0399.suppressed.lib and object C:\Developer\unreal_class\BullCowGame-starter-kit\Intermediate\Build\Win64\UE4Editor\Development\BullCowGame\UE4Editor-BullCowGame-0399.suppressed.exp
BullCowGameEditor.target (0:00.17 at +1:03)
---------------------- Done ----------------------

Rebuild All: 1 succeeded, 0 failed, 0 skipped

1 build system warning(s):

Temporary license has expired

Total time in XGE executor: 63.97 seconds
Total execution time: 64.69 seconds