Using multiple sources in one task

// npm install --save-dev gulp merge-stream

var gulp = require('gulp');
var merge = require('merge-stream');

gulp.task('test', function() {
  var bootstrap = gulp.src('bootstrap/js/*.js')
    .pipe(gulp.dest('public/bootstrap'));

  var jquery = gulp.src('jquery.cookie/jquery.cookie.js')
    .pipe(gulp.dest('public/jquery'));

  return merge(bootstrap, jquery);
});

gulp.src will emit files in the order they were added:

```js // npm install gulp gulp-concat

var gulp = require('gulp'); var concat = require('gulp-concat');

gulp.task('default', function() { return gulp.src(['foo/', 'bar/']) .pipe(concat('result.txt')) .pipe(gulp.dest('build')); });