Toggle shortcut to turn brush into eraser

I wrote a JavaScript with the action recorder some years back and i have been using it to toggle between various sets of tools, mostly when I work on the Cintiq, since you really only have 8 buttons immediately available. 

It works like this: you record an action calling the script through File > Scripts > Browse...

You select the tool_toggle.jsx file and then stop the recording.

You can replace the tools you want to toggle by selecting from the commented parameters at the end of the file. I left them in there so I would not constantly have to look up their names. As this file is a few years old, there may be newer tools now that I have not yet included.

#target photoshop

// Toggle between Photoshop's Brush- and Eraser-Tool
if (getTool() == 'paintbrushTool') {
    setTool('eraserTool');
} else {
    setTool('paintbrushTool');
}

// https://forums.adobe.com/thread/579195
function getTool(){
    var ref = new ActionReference();
    ref.putEnumerated( charIDToTypeID("capp"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
    var cTool = typeIDToStringID(executeActionGet(ref).getEnumerationType(stringIDToTypeID('tool')));
    return cTool;
}

// http://www.ps-scripts.com/bb/viewtopic.php?t=2179
function setTool(tool) {
    var desc9 = new ActionDescriptor();
    var ref7 = new ActionReference();
    ref7.putClass( app.stringIDToTypeID(tool) );
    desc9.putReference( app.charIDToTypeID('null'), ref7 );
    executeAction( app.charIDToTypeID('slct'), desc9, DialogModes.NO );
}

// moveTool
// marqueeRectTool
// marqueeEllipTool
// marqueeSingleRowTool
// marqueeSingleColumnTool
// lassoTool
// polySelTool
// magneticLassoTool
// quickSelectTool
// magicWandTool
// cropTool
// sliceTool
// sliceSelectTool
// spotHealingBrushTool
// magicStampTool
// patchSelection
// redEyeTool
// paintbrushTool
// pencilTool
// colorReplacementBrushTool
// cloneStampTool
// patternStampTool
// historyBrushTool
// artBrushTool
// eraserTool
// backgroundEraserTool
// magicEraserTool
// gradientTool
// bucketTool
// blurTool
// sharpenTool
// smudgeTool
// dodgeTool
// burnInTool
// saturationTool
// penTool
// freeformPenTool
// addKnotTool
// deleteKnotTool
// convertKnotTool
// typeCreateOrEditTool
// typeVerticalCreateOrEditTool
// typeCreateMaskTool
// typeVerticalCreateMaskTool
// pathComponentSelectTool
// directSelectTool
// rectangleTool
// roundedRectangleTool
// ellipseTool
// polygonTool
// lineTool
// customShapeTool
// textAnnotTool
// soundAnnotTool
// eyedropperTool
// colorSamplerTool
// rulerTool
// handTool
// zoomTool 

I had some trusty friends with Macs experiment for me and this is what worked for them:

Option+Shift+R works for them 👍 To return to Normal Mode: Option+Shift+N

I hope it works for you and you can be excited and happy 🙂