MaxMSP CSV Processor

csv_reader.js

//read in a csv on initialization of object
//automatically set num of outlets based on num of columns in csv
//send value of each column out of the respective outlet index on a bang
//outlet values are all strings

var csv_filename = "";

if (jsarguments.length>1)
	csv_filename = jsarguments[1];

var f = new File(csv_filename)
var data = f.readline()
var numColumns = data.split(",").length
outlets = numColumns

function bang()
{
	if (!f.isopen) {
		error("could not open file:" + csv_filename)
		return
	}
	if (f.position >= f.eof) {
		//reached end of file, looping back to start of file
		//set file pos to 0, then read in header line
		f.position = 0
		f.readline()

	}
	
	data = f.readline()	
	var parsedData = data.split(",")	
	parsedData.forEach( function(columnValue, i) { 
		outlet(i,columnValue.trim());
	});
}

csvReader.maxpat

{
	"patcher" : 	{
		"fileversion" : 1,
		"appversion" : 		{
			"major" : 8,
			"minor" : 1,
			"revision" : 11,
			"architecture" : "x64",
			"modernui" : 1
		}
,
		"classnamespace" : "box",
		"rect" : [ 691.0, 201.0, 415.0, 480.0 ],
		"bglocked" : 0,
		"openinpresentation" : 0,
		"default_fontsize" : 12.0,
		"default_fontface" : 0,
		"default_fontname" : "Arial",
		"gridonopen" : 1,
		"gridsize" : [ 15.0, 15.0 ],
		"gridsnaponopen" : 1,
		"objectsnaponopen" : 1,
		"statusbarvisible" : 2,
		"toolbarvisible" : 1,
		"lefttoolbarpinned" : 0,
		"toptoolbarpinned" : 0,
		"righttoolbarpinned" : 0,
		"bottomtoolbarpinned" : 0,
		"toolbars_unpinned_last_save" : 0,
		"tallnewobj" : 0,
		"boxanimatetime" : 200,
		"enablehscroll" : 1,
		"enablevscroll" : 1,
		"devicewidth" : 0.0,
		"description" : "",
		"digest" : "",
		"tags" : "",
		"style" : "",
		"subpatcher_template" : "",
		"assistshowspatchername" : 0,
		"boxes" : [ 			{
				"box" : 				{
					"id" : "obj-11",
					"linecount" : 3,
					"maxclass" : "comment",
					"numinlets" : 1,
					"numoutlets" : 0,
					"patching_rect" : [ 30.5, 38.0, 266.0, 48.0 ],
					"text" : "a demo for the csv_reader.js helper file.\nbang steps through the csv.\nclick open to see docs inside csv_reader.js"
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-9",
					"maxclass" : "newobj",
					"numinlets" : 1,
					"numoutlets" : 0,
					"patching_rect" : [ 256.0, 230.0, 32.0, 22.0 ],
					"text" : "print"
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-6",
					"maxclass" : "newobj",
					"numinlets" : 1,
					"numoutlets" : 1,
					"outlettype" : [ "" ],
					"patching_rect" : [ 102.0, 230.0, 71.0, 22.0 ],
					"text" : "fromsymbol"
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-4",
					"maxclass" : "newobj",
					"numinlets" : 1,
					"numoutlets" : 0,
					"patching_rect" : [ 102.0, 315.0, 32.0, 22.0 ],
					"text" : "print"
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-2",
					"maxclass" : "newobj",
					"numinlets" : 2,
					"numoutlets" : 1,
					"outlettype" : [ "int" ],
					"patching_rect" : [ 102.0, 272.0, 32.0, 22.0 ],
					"text" : "+ 10"
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-7",
					"maxclass" : "newobj",
					"numinlets" : 1,
					"numoutlets" : 0,
					"patching_rect" : [ 188.0, 230.0, 32.0, 22.0 ],
					"text" : "print"
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-8",
					"maxclass" : "message",
					"numinlets" : 2,
					"numoutlets" : 1,
					"outlettype" : [ "" ],
					"patching_rect" : [ 43.0, 95.0, 50.0, 22.0 ],
					"text" : "compile"
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-5",
					"maxclass" : "button",
					"numinlets" : 1,
					"numoutlets" : 1,
					"outlettype" : [ "bang" ],
					"parameter_enable" : 0,
					"patching_rect" : [ 155.0, 95.0, 24.0, 24.0 ]
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-3",
					"maxclass" : "message",
					"numinlets" : 2,
					"numoutlets" : 1,
					"outlettype" : [ "" ],
					"patching_rect" : [ 102.0, 95.0, 35.0, 22.0 ],
					"text" : "open"
				}

			}
, 			{
				"box" : 				{
					"id" : "obj-1",
					"maxclass" : "newobj",
					"numinlets" : 1,
					"numoutlets" : 2,
					"outlettype" : [ "", "" ],
					"patching_rect" : [ 102.0, 164.0, 135.0, 22.0 ],
					"saved_object_attributes" : 					{
						"filename" : "csv_reader.js",
						"parameter_enable" : 0
					}
,
					"text" : "js csv_reader.js test.csv"
				}

			}
 ],
		"lines" : [ 			{
				"patchline" : 				{
					"destination" : [ "obj-6", 0 ],
					"source" : [ "obj-1", 0 ]
				}

			}
, 			{
				"patchline" : 				{
					"destination" : [ "obj-7", 0 ],
					"source" : [ "obj-1", 1 ]
				}

			}
, 			{
				"patchline" : 				{
					"destination" : [ "obj-4", 0 ],
					"source" : [ "obj-2", 0 ]
				}

			}
, 			{
				"patchline" : 				{
					"destination" : [ "obj-1", 0 ],
					"source" : [ "obj-3", 0 ]
				}

			}
, 			{
				"patchline" : 				{
					"destination" : [ "obj-1", 0 ],
					"source" : [ "obj-5", 0 ]
				}

			}
, 			{
				"patchline" : 				{
					"destination" : [ "obj-2", 0 ],
					"source" : [ "obj-6", 0 ]
				}

			}
, 			{
				"patchline" : 				{
					"destination" : [ "obj-1", 0 ],
					"source" : [ "obj-8", 0 ]
				}

			}
 ],
		"dependency_cache" : [ 			{
				"name" : "csv_reader.js",
				"bootpath" : "~/Documents",
				"patcherrelativepath" : ".",
				"type" : "TEXT",
				"implicit" : 1
			}
 ],
		"autosave" : 0
	}

}

test.csv

test2.csv