remove

wayland/esp32-preferences/remove

Remove the specified key-value pair from the open namespace.
remove
@/remove
Remove the specified key-value pair from the open namespace.
Prefs@/preferences
A preferences object.
Keystring
Key name. Limited to 15 chars.
UPDpulse
Update
remove
Prefs
Key
UPD
Done
Donepulse
Pulse on removal.
To use the node in your project you should have the wayland/esp32-preferences library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See Using libraries for more info.

C++ implementation

#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD

node {

    void evaluate(Context ctx) {
        // The node responds only if there is an input pulse
        if (!isInputDirty<input_UPD>(ctx))
            return;
        auto prefs = getValue<input_Prefs>(ctx);
        auto xStringKey = getValue<input_Key>(ctx);
        
        int N=length(xStringKey);
        if (N>15 || N<1) {
            raiseError(ctx);
            return;
        }
        N +=1;
        char cStringKey[N];
        for(int i=0;i<N;i++)
            cStringKey[i]=0;
        dump(xStringKey, cStringKey);

        if (!prefs -> remove(cStringKey)) {
            raiseError(ctx);
            return;
        }

        emitValue<output_Done>(ctx, 1);
    }
}