completed

.eslintrc

@@ -0,0 +1,21 @@
+{
+ "rules": {
+   "no-console": "off",
+   "indent": [ "error", 2 ],
+   "quotes": [ "error", "single" ],
+   "semi": ["error", "always"],
+   "linebreak-style": [ "error", "unix" ]
+ },
+ "env": {
+   "es6": true,
+   "node": true,
+   "mocha": true,
+   "jasmine": true
+ },
+ "ecmaFeatures": {
+   "modules": true,
+   "experimentalObjectRestSpread": true,
+   "impliedStrict": true
+ },
+ "extends": "eslint:recommended"
+}

.gitignore

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+# Created by https://www.gitignore.io/api/node,vim,osx,macos,linux
+
+*node_modules
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+
+
+### Vim ###
+# swap
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+# session
+Session.vim
+# temporary
+.netrwhist
+*~
+# auto-generated tag files
+tags
+
+
+### OSX ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+# Thumbnails
+._*
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+
+### macOS ###
+# Icon must end with two \r
+# Thumbnails
+# Files that might appear in the root of a volume
+# Directories potentially created on remote AFP share
+
+
+### Linux ###
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+# End of https://www.gitignore.io/api/node,vim,osx,macos,linux
+l

data/one.txt

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+Hello this is test one

data/three.txt

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+Hello this is test three

data/two.txt

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+Hello this is test two

gulpfile.js

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+'use strict';
+
+const gulp = require('gulp');
+const eslint = require('gulp-eslint');
+const mocha = require('gulp-mocha');
+
+gulp.task('test', function() {
+  gulp.src('./test/*-test.js', {
+      read: false
+    })
+    .pipe(mocha({
+      reporter: 'spec'
+    }));
+});
+
+gulp.task('lint', function() {
+  return gulp.src(['**/*.js', '!node_modules'])
+    .pipe(eslint())
+    .pipe(eslint.format())
+    .pipe(eslint.failAfterError());
+});
+
+gulp.task('dev', function() {
+  gulp.watch(['**/*.js', '!node_modules/**'], ['lint', 'test']);
+});
+
+gulp.task('default', ['dev']);

index.js

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+'use strict';
+
+const fs = require('fs');
+
+const fileReader = require('./lib/file-reader.js')
+
+fileReader(`${__dirname}/./data/one.txt`, function(err, data) {
+  if (err) throw err;
+  console.log('one:', data.toString('hex', 0, 8));
+});
+
+fileReader(`${__dirname}/./data/two.txt`, function(err, data) {
+  if (err) throw err;
+  console.log('two:', data.toString('hex', 0, 8));
+});
+
+fileReader(`${__dirname}/./data/two.txt`, function(err, data) {
+  if (err) throw err;
+  console.log('three:', data.toString('hex', 0, 8));
+});

lib/file-reader.js

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+'use strict';
+
+const fs = require('fs');
+
+const fileReader = module.exports = function(file, callback){
+  fs.readFile(file, function(err, data){
+    if (err) callback(err);
+    return callback(null, data.toString('hex',0,8));
+  });
+};

package.json

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+{
+  "name": "03-parallel_file_processing",
+  "version": "1.0.0",
+  "description": "![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) Lab 03: Parallel File Processing ===",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/sueanyv/03-parallel_file_processing.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/sueanyv/03-parallel_file_processing/issues"
+  },
+  "homepage": "https://github.com/sueanyv/03-parallel_file_processing#readme",
+  "devDependencies": {
+    "chai": "^3.5.0",
+    "gulp": "^3.9.1",
+    "gulp-eslint": "^3.0.1",
+    "mocha": "^3.2.0"
+  }
+}

test/file-reader-test.js

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+'use strict';
+
+const fs = require('fs');
+const expect = require('chai').expect;
+const fileReader = require('../lib/file-reader.js');
+
+describe('Reading all three files', function(){
+
+
+  it('should rad the files in order, and provide the first 8 bytes of each file', function(done){
+    fileReader(`${__dirname}/../data/one.txt`, function(err, data){
+      expect(err).to.equal(err);
+      expect(data).to.equal('48656c6c6f207468');
+      expect(data).to.have.length.above(8);
+      fileReader(`${__dirname}/../data/two.txt`, function(err, data){
+        expect(err).to.equal(err);
+        expect(data).to.equal('48656c6c6f207468');
+        expect(data).to.have.length.above(8);
+        fileReader(`${__dirname}/../data/three.txt`, function(err, data){
+          expect(err).to.equal(err);
+          expect(data).to.equal('48656c6c6f207468');
+          expect(data).to.have.length.above(8);
+          done();
+        });
+      });
+    });
+  });
+  it('File not found.', function(done) {
+    fileReader('', function(err, data) {
+      expect(err).to.exist;
+      expect(data).to.not.exist;
+      done();
+    });
+  });
+});