Sketch Plugin Snippet - Select layers of Type.js

var doc = context.document

var selectLayersOfType_inContainer = function(layerType, containerLayer) {
    
    // Filter layers using NSPredicate
	var scope = (typeof containerLayer !== 'undefined') ? [containerLayer children] : [[doc currentPage] children],
		predicate = NSPredicate.predicateWithFormat("(className == %@)", layerType),
		layers = [scope filteredArrayUsingPredicate:predicate];
		
	// Deselect current selection
	[[doc currentPage] deselectAllLayers]
	
	// Loop through filtered layers and select them
	var loop = [layers objectEnumerator], layer;
	while (layer = [loop nextObject]) {
		[layer select:true byExpandingSelection:true]
	}
	log([layers count] + " " + layerType + "s selected")
}

// Select all Artboards in current page
selectLayersOfType_inContainer("MSArtboardGroup")

// Select all Text Layers in current page
//selectLayersOfType_inContainer("MSTextLayer")

// Types of layers that can be selected :
// MSLayerGroup
// MSShapeGroup
// MSShapePathLayer
// MSTextLayer
// MSArtboardGroup