How to use the mississippi.from function in mississippi

'use strict';

var os = require('os');
var path = require('path');

var fs = require('graceful-fs');
var miss = require('mississippi');
var expect = require('expect');
var rimraf = require('rimraf');

var mkdirpStream = require('../');

var pipe = miss.pipe;
var from = miss.from;
var concat = miss.concat;

describe('mkdirpStream', function() {

  var MASK_MODE = parseInt('7777', 8);
  var isWindows = (os.platform() === 'win32');

  var outputBase = path.join(__dirname, './out-fixtures');
  var outputDirpath = path.join(outputBase, './foo');

  function cleanup(done) {
    this.timeout(20000);

    expect.restoreSpies();

    // Async del to get sort-of-fix for https://github.com/isaacs/rimraf/issues/72

/* global it, describe */

var expect = require('expect');

var miss = require('mississippi');

var OrderedStreams = require('..');

var to = miss.to;
var from = miss.from;
var pipe = miss.pipe;
var concat = miss.concat;

function fromOnce(fn) {
  var called = false;
  return from.obj(function(size, next) {
    if (called) {
      return next(null, null);
    }
    called = true;
    fn.apply(this, arguments);
  });
}

describe('ordered-read-streams', function () {

'use strict';
var mocha = require('mocha');
var assert = require('power-assert');
var Vinyl = require('vinyl');
var uglifyjs = require('uglify-js');
var mississippi = require('mississippi');
var gulpUglify = require('../');

var pipe = mississippi.pipe;
var to = mississippi.to;
var from = mississippi.from;

var describe = mocha.describe;
var it = mocha.it;

describe('no-compress', function() {
  it('should not compress files when `compress: false`', function(done) {
    var testContentsInput =
      '"use strict"; (function(console, first, second) {\n\tconsole.log(first + second)\n}(5, 10))';
    var testContentsExpected = uglifyjs.minify(testContentsInput, {
      compress: false
    }).code;

    var testFile1 = new Vinyl({
      cwd: '/home/terin/broken-promises/',
      base: '/home/terin/broken-promises/test',
      path: '/home/terin/broken-promises/test/test1.js',

'use strict';
var mocha = require('mocha');
var assert = require('power-assert');
var Vinyl = require('vinyl');
var td = require('testdouble');
var mississippi = require('mississippi');
var minifer = require('../minifier');

var pipe = mississippi.pipe;
var from = mississippi.from;
var to = mississippi.to;

var describe = mocha.describe;
var it = mocha.it;

describe('injecting mocha', function() {
  it('should minify files', function(done) {
    var testContentsOutput = 'function abs(a, b) {\n  return a > b; }';
    var testContentsInput = 'function testInput() {}';
    var testFile = new Vinyl({
      cwd: '/home/terin/broken-promises/',
      base: '/home/terin/broken-promises/test',
      path: '/home/terin/broken-promises/test/test1.js',
      contents: new Buffer(testContentsInput)
    });

'use strict';

var path = require('path');

var fs = require('graceful-fs');
var File = require('vinyl');
var expect = require('expect');
var miss = require('mississippi');

var vfs = require('../');

var testConstants = require('./utils/test-constants');

var pipe = miss.pipe;
var from = miss.from;
var concat = miss.concat;
var through = miss.through;

var inputBase = testConstants.inputBase;
var inputPath = testConstants.inputPath;
var inputDirpath = testConstants.inputDirpath;
var bomInputPath = testConstants.bomInputPath;
var beEncodedInputPath = testConstants.beEncodedInputPath;
var leEncodedInputPath = testConstants.leEncodedInputPath;
var contents = testConstants.contents;

describe('.src()', function() {

  it('throws on invalid glob (empty)', function(done) {
    var stream;
    try {

'use strict';

var fs = require('graceful-fs');
var File = require('vinyl');
var expect = require('expect');
var miss = require('mississippi');

var vfs = require('../');

var cleanup = require('./utils/cleanup');
var isWindows = require('./utils/is-windows');
var testConstants = require('./utils/test-constants');

var from = miss.from;
var pipe = miss.pipe;
var concat = miss.concat;

var inputBase = testConstants.inputBase;
var outputBase = testConstants.outputBase;
var inputPath = testConstants.inputPath;
var outputPath = testConstants.outputPath;
var contents = testConstants.contents;

var clean = cleanup(outputBase);

describe('.dest() with custom times', function() {

  beforeEach(clean);
  afterEach(clean);

var isOwner = fo.isOwner;
var writeFile = fo.writeFile;
var getModeDiff = fo.getModeDiff;
var getTimesDiff = fo.getTimesDiff;
var getOwnerDiff = fo.getOwnerDiff;
var isValidUnixId = fo.isValidUnixId;
var getFlags = fo.getFlags;
var isFatalOverwriteError = fo.isFatalOverwriteError;
var isFatalUnlinkError = fo.isFatalUnlinkError;
var reflectStat = fo.reflectStat;
var reflectLinkStat = fo.reflectLinkStat;
var updateMetadata = fo.updateMetadata;
var createWriteStream = fo.createWriteStream;

var pipe = miss.pipe;
var from = miss.from;

var string = testStreams.string;

var outputBase = testConstants.outputBase;
var inputPath = testConstants.inputPath;
var neInputDirpath = testConstants.neInputDirpath;
var outputPath = testConstants.outputPath;
var symlinkPath = testConstants.symlinkDirpath;
var contents = testConstants.contents;

var clean = cleanup(outputBase);

function noop() {}

describe('isOwner', function() {

'use strict';

var miss = require('mississippi');
var expect = require('expect');

var to = miss.to;
var from = miss.from;
var through = miss.through;

function string(length) {
  return from(function(size, next) {
    if (length <= 0) {
      next(null, null);
      return;
    }

    var chunkSize = size <= length ? size : length;

    length -= size;

    var chunk = '';
    for (var x = 0; x < chunkSize; x++) {
      chunk += 'a';

for (let [index, row] of rows.entries()) {
        rows[index] = await Promise.resolve(argv.transformOut(row, { index, rows, config }))
      }
    }

    let serializer

    if (argv.classicJson) {
      serializer = streams.classicJsonOutputStream()
    } else if (argv.json) {
      serializer = ndjson.serialize()
    } else {
      serializer = csvWriter(csvOptions)
    }

    miss.from.obj(rows)
      .pipe(serializer)
      .pipe(outputStream)
  }

MetadataContainer.prototype.getStream = function() {
	var stream = miss.from.obj();
	stream.push(this);
	stream.push(null);
	return stream;
}