Lab02 fredric

lab02-fredric/.eslintignore

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+**/node_modules/*
+**/vendor/*
+**/*.min.js
+**/coverage/*
+**/build/*

lab02-fredric/.eslintrc.json

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+{
+  "env": {
+    "browser": true,
+    "node": true,
+    "commonjs": true,
+    "jest": true,
+    "es6": true
+  },
+  "globals": {
+    "err": true,
+    "req": true,
+    "res": true,
+    "next": true
+  },
+  "extends": "eslint:recommended",
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "rules": {
+    "no-console": "off",
+    "indent": [ "error", 2 ],
+    "quotes": ["error", "single", { "allowTemplateLiterals": true }],
+    "comma-dangle": ["error", "always-multiline"],
+    "semi": [ "error", "always" ]
+  }
+}

lab02-fredric/.gitignore

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+# Created by https://www.gitignore.io/api/osx,vim,node,linux
+
+### 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*
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.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
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# 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
+
+# dotenv environment variables file
+.env
+
+
+### 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
+
+### 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
+
+# End of https://www.gitignore.io/api/osx,vim,node,linux

lab02-fredric/README.md

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+
+
+## Lab 02 class 401d19 Documentation
+
+The exported values of fp.js is an object named fp.
+
+Functions
+<fp.map> has an arity of 2 callback(function), collection(array).
+returns a new <array> with the callback <function> applied on the original elements unless there are errors.
+It’s limitations are that it should take any array and throws a TypeError if collection input is not an array.
+
+<fp.reduce> has an arity of 3 callback(function), collection(array)and initialValue(string, number)
+will return a single value when applying a <function> on a <accumulator> and the <array>.
+It’s limitations are that it should take any array and optional initialValue and throws a TypeError if collection input is not an array.
+And will throw a TypeError if callback is not a function.
+
+<fp.filter> has an arity of 2 callback(function), collection(array).
+will return an <array> of elements that are passed through the callback filter
+It’s limitations are that it should take any array and throws a TypeError if collection input is not an array.
+And will throw a TypeError if callback is not a function.
+
+<fp.slice> has an arity: 3 begin(number), end(number), collection(array)
+will return a new <array> with numbers sliced from the original <array>
+It’s limitations are that it should take any array and will throw a TypeError if collection input is not an array.
+And will throw a TypeError if begin or end are not a number.

lab02-fredric/__test__/fp-curry.testy.js

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+'use strict';
+
+const fp = require('../lib/fp.js');
+
+describe('<fp.test.js>', () => {
+  describe('tests for <fp.map>', () => {
+    test('fp.map should return a new <array> with the callback <function> applied on the original elements unless there are errors', () => {
+      expect(fp.map(
+        n => n * 2, [1, 2, 3]
+      )).toEqual([2, 4, 6]);
+    });
+    test('throw an exception if NOT an <array>', () => {
+      expect(() => {
+        fp.map((n => n * 2),
+          'This is a string, NOT an <array>');
+      }).toThrow();
+    });
+  });
+
+  describe('tests <fp.reduce>', () => {
+    test('fp.reduce will return a single value when applying a <function> on a <accumulator> and the <array>', () => {
+      expect(fp.reduce(
+        (accumulator, currentValue) => {
+          return accumulator + currentValue;
+        }, [1, 2, 3],
+        0
+      )).toBe(6);
+    });
+
+    test('An exception will be thrown if callback is NOT a <function>', () => {
+      expect(() => {
+        fp.reduce('This is a STRING, NOT a <function>', [1, 2, 3],
+          0);
+      }).toThrow();
+      expect(() => {
+        fp.reduce(
+          [1, 2, 3], [1, 2, 3],
+          0);
+      }).toThrow();
+    });
+
+    test('An exception will be thrown if the collection is NOT an <array>', () => {
+      expect(() => {
+        fp.reduce(
+          (accumulator, currentValue) => {
+            return accumulator + currentValue;
+          },
+          'This is a STRING, NOT an <array>',
+          0);
+      }).toThrow();
+    });
+
+    describe('Tests for <fp.filter>', () => {
+      test('<fp.filter> will return an <array> of elements that passed through the callback filter', () => {
+        expect(fp.filter(
+          (n => n < 3),
+          [1, 2, 3]
+        )).toEqual([1, 2]);
+      });
+
+      test('An exception will be thrown if the collection is NOT a <array>', () => {
+        expect(() => {
+          fp.filter(n => n < 3,
+            'This is a STRING, NOT an <array>');
+        }).toThrow();
+      });
+
+      test('An exception will be thrown if the callback is NOT a <function>', () => {
+        expect(() => {
+          fp.filter(
+            'string',
+            [1,2,3]);
+        }).toThrow();
+      });
+    });
+
+    describe('tests for <fp.slice>', () => {
+      test('<fp.slice> will return a new <array> with numbers sliced from the original <array>', ()=> {
+        expect(fp.slice(1, 4, [1, 2, 3, 5, 6]
+        )).toEqual([2, 3, 5]);
+      });
+
+      test('An exception will be thrown if collection is not a <array>', () => {
+        expect(() => {
+          fp.slice(
+            1,
+            4,
+            'collection not an array');
+        }).toThrow();
+      });
+
+      test('An exception will be thrown if begin or end is not a number', () => {
+        expect(() => {
+          fp.slice(
+            'string',
+            4,
+            [1,2,3,5,6,7,8]);
+        }).toThrow();
+        expect(() => {
+          fp.slice(
+            1,
+            true,
+            [1,2,3,5,6,7,8]);
+        }).toThrow();
+      });
+    });
+  });
+});

lab02-fredric/__test__/fp.test.js

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+'use strict';
+
+const fp = require('../lib/fp.js');
+
+describe('<fp.test.js>', () => {
+  describe('tests for <fp.map>', () => {
+    test('fp.map should return a new <array> with the callback <function> applied on the original elements unless there are errors', () => {
+      expect(fp.map(
+        n => n * 2, [1, 2, 3]
+      )).toEqual([2, 4, 6]);
+    });
+    test('throw an exception if NOT an <array>', () => {
+      expect(() => {
+        fp.map((n => n * 2),
+          'This is a string, NOT an <array>');
+      }).toThrow();
+    });
+  });
+
+  describe('tests <fp.reduce>', () => {
+    test('fp.reduce will return a single value when applying a <function> on a <accumulator> and the <array>', () => {
+      expect(fp.reduce(
+        (accumulator, currentValue) => {
+          return accumulator + currentValue;
+        }, [1, 2, 3],
+        0
+      )).toBe(6);
+    });
+
+    test('An exception will be thrown if callback is NOT a <function>', () => {
+      expect(() => {
+        fp.reduce('This is a STRING, NOT a <function>', [1, 2, 3],
+          0);
+      }).toThrow();
+      expect(() => {
+        fp.reduce(
+          [1, 2, 3], [1, 2, 3],
+          0);
+      }).toThrow();
+    });
+
+    test('An exception will be thrown if the collection is NOT an <array>', () => {
+      expect(() => {
+        fp.reduce(
+          (accumulator, currentValue) => {
+            return accumulator + currentValue;
+          },
+          'This is a STRING, NOT an <array>',
+          0);
+      }).toThrow();
+    });
+
+    describe('Tests for <fp.filter>', () => {
+      test('<fp.filter> will return an <array> of elements that passed through the callback filter', () => {
+        expect(fp.filter(
+          (n => n < 3),
+          [1, 2, 3]
+        )).toEqual([1, 2]);
+      });
+
+      test('An exception will be thrown if the collection is NOT a <array>', () => {
+        expect(() => {
+          fp.filter(n => n < 3,
+            'This is a STRING, NOT an <array>');
+        }).toThrow();
+      });
+
+      test('An exception will be thrown if the callback is NOT a <function>', () => {
+        expect(() => {
+          fp.filter(
+            'string',
+            [1,2,3]);
+        }).toThrow();
+      });
+    });
+
+    describe('tests for <fp.slice>', () => {
+      test('<fp.slice> will return a new <array> with numbers sliced from the original <array>', ()=> {
+        expect(fp.slice(1, 4, [1, 2, 3, 5, 6]
+        )).toEqual([2, 3, 5]);
+      });
+
+      test('An exception will be thrown if collection is not a <array>', () => {
+        expect(() => {
+          fp.slice(
+            1,
+            4,
+            'collection not an array');
+        }).toThrow();
+      });
+
+      test('An exception will be thrown if begin or end is not a number', () => {
+        expect(() => {
+          fp.slice(
+            'string',
+            4,
+            [1,2,3,5,6,7,8]);
+        }).toThrow();
+        expect(() => {
+          fp.slice(
+            1,
+            true,
+            [1,2,3,5,6,7,8]);
+        }).toThrow();
+      });
+    });
+  });
+});