completed day 3 lab

.eslintrc

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+{
+  "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

data/one.txt

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+Brian is a pretty cool teacher

data/three.txt

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+Hopefully I get this right

data/two.txt

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+Too bad he makes me text this in order

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:'nyan'}));
+});
+
+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 fileReader = require('./lib/file-reader.js');
+
+fileReader(`${__dirname}/data/one.txt`, `${__dirname}/data/two.txt`, `${__dirname}/data/three.txt`);

lib/file-reader.js

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+'use strict';
+
+const fs = require('fs');
+
+const fileReader = module.exports = function(file1, file2, file3, callback){
+  let resArr = [];
+  fs.readFile(file1, function(err, data){
+    if(err) return callback(err);
+    var eightHexes = data.toString('hex')
+                    .match(/.{1,2}/g)
+                    .filter(function(ele, index){
+                      return index <= 7;
+                    }).join('');
+    resArr.push(eightHexes);
+    console.log(eightHexes);
+    fs.readFile(file2, function(err, data){
+      if(err) return callback(err);
+      eightHexes = data.toString('hex')
+                  .match(/.{1,2}/g)
+                  .filter(function(ele, index){
+                    return index <= 7;
+                  }).join('');
+      resArr.push(eightHexes);
+      console.log(eightHexes);
+      fs.readFile(file3, function(err, data){
+        if(err) return callback(err);
+        eightHexes = data.toString('hex')
+                    .match(/.{1,2}/g)
+                    .filter(function(ele, index){
+                      return index <= 7;
+                    }).join('');
+        resArr.push(eightHexes);
+        console.log(eightHexes);
+        return callback(null, resArr);
+      });
+    });
+  });
+};

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",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/brials/03-parallel_file_processing.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/brials/03-parallel_file_processing/issues"
+  },
+  "homepage": "https://github.com/brials/03-parallel_file_processing#readme",
+  "devDependencies": {
+    "chai": "^3.5.0",
+    "gulp": "^3.9.1",
+    "gulp-eslint": "^3.0.1",
+    "gulp-mocha": "^3.0.1",
+    "mocha": "^3.2.0"
+  }
+}

test/file-reader-test.js

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+'use strict';
+
+const expect = require('chai').expect;
+const fileReader = require('../lib/file-reader.js');
+
+describe('File Reader Module', function(){
+  describe('with an improper set of filepaths', function(){
+    it('should return an error', function(done){
+      fileReader('bad/path1', 'bad/path2', 'bad/path3', function(err){
+        expect(err).to.be.an('error');
+        done();
+      });
+    });
+  });
+  describe('with an improper 2nd & 3rd filepath', function(){
+    it('should return an error', function(done){
+      fileReader(`${__dirname}/data/one.txt`, 'bad/path2', 'bad/path3', function(err){
+        expect(err).to.be.an('error');
+        done();
+      });
+    });
+  });
+  describe('with an improper 3rd filepath', function(){
+    it('should return an error', function(done){
+      fileReader(`${__dirname}/../data/one.txt`, `${__dirname}/../data/two.txt`, 'bad/path3', function(err){
+        expect(err).to.be.an('error');
+        done();
+      });
+    });
+  });
+  describe('with all of the correct file paths', function(){
+    it('should return all of the correct data', function(done){
+      fileReader(`${__dirname}/../data/one.txt`, `${__dirname}/../data/two.txt`, `${__dirname}/../data/three.txt`, function(err, data){
+        expect(data.length).to.equal(3);
+        expect(data[0]).to.equal('427269616e206973');
+        expect(data[1]).to.equal('546f6f2062616420');
+        expect(data[2]).to.equal('486f706566756c6c');
+        done();
+      });
+    });
+  });
+});