nodejsインタラクティブライブラリ--hash-sum,deepmergeとyaml-front-mater

yarn add hash-sum

const sum = require('hash-sum');

console.log(sum([ 0, 1, 2, 3 ])) // 00a34759
console.log(sum('1988-06-09T03:00:00.000Z')) // dff5ee3c

# creates unique hashes
00a34759 from: [ 0, 1, 2, 3 ]
a8996f0c from: { '0': 0, '1': 1, '2': 2, '3': 3 }
5b4c2116 from: { '0': 0, '1': 1, '2': 2, '3': 3, length: 4 }
2c937c45 from: { url: 12 }
31d55010 from: { headers: 12 }
2d2e11bc from: { headers: 122 }
ec99d958 from: { headers: '122' }
18c00eee from: { headers: { accept: 'text/plain' } }
6cb332c8 from: { payload: [ 0, 1, 2, 3 ], headers: [ { a: 'b' } ] }
12ff55db from: { a: [Function: a] }
46f806d2 from: { b: [Function: b] }
0660d9c4 from: { b: [Function: b] }
6c95fc65 from: function () {}
2941766e from: function (a) {}
294f8def from: function (b) {}
2d9c0cb8 from: function (a) { return a;}
ed5c63fc from: function (a) {return a;}
bba68bf6 from: ''
2d27667d from: 'null'
774b96ed from: 'false'
2d2a1684 from: 'true'
8daa1a0c from: '0'
8daa1a0a from: '1'
e38f07cc from: 'void 0'
6037ea1a from: 'undefined'
9b7df12e from: null
3c206f76 from: false
01e34ba8 from: true
8a8f9624 from: Infinity
0315bf8f from: -Infinity
64a48b16 from: NaN
1a96284a from: 0
1a96284b from: 1
29172c1a from: undefined
59322f29 from: {}
095b3a22 from: { a: {}, b: {} }
63be56dd from: { valueOf: [Function: valueOf] }
63be4f5c from: { valueOf: [Function: valueOf] }
5d844489 from: []
ba0bfa14 from: 2019-06-28T21:24:31.215Z
49324d16 from: 2019-06-28T03:00:00.000Z
434c9188 from: 1988-06-09T03:00:00.000Z
ce1b5e44 from: global

const x = {
  foo: { bar: 3 },
  array: [{
    does: 'work',
    too: [1, 2, 3]
  }]
}

const y = {
  foo: { baz: 4 },
  quux: 5,
  array: [{
    does: 'work',
    too: [4, 5, 6]
  }, {
    really: 'yes'
  }]
}

const output = {
  foo: {
    bar: 3,
    baz: 4
  },
  array: [{
    does: 'work',
    too: [1, 2, 3]
  }, {
    does: 'work',
    too: [4, 5, 6]
  }, {
    really: 'yes'
  }],
  quux: 5
}

npm install deepmerge

const merge = require('deepmerge')

const foobar = { foo: { bar: 3 } }
const foobaz = { foo: { baz: 4 } }
const bar = { bar: 'yay!' }

merge.all([ foobar, foobaz, bar ]) // => { foo: { bar: 3, baz: 4 }, bar: 'yay!' }

const overwriteMerge = (destinationArray, sourceArray, options) => sourceArray

merge(
    [1, 2, 3],
    [3, 2, 1],
    { arrayMerge: overwriteMerge }
) // => [3, 2, 1]

const combineMerge = (target, source, options) => {
    const destination = target.slice()

    source.forEach((item, index) => {
        if (typeof destination[index] === 'undefined') {
            destination[index] = options.cloneUnlessOtherwiseSpecified(item, options)
        } else if (options.isMergeableObject(item)) {
            destination[index] = merge(target[index], item, options)
        } else if (target.indexOf(item) === -1) {
            destination.push(item)
        }
    })
    return destination
}

merge(
    [{ a: true }],
    [{ b: true }, 'ah yup'],
    { arrayMerge: combineMerge }
) // => [{ a: true, b: true }, 'ah yup']

const isPlainObject = require('is-plain-object')

function SuperSpecial() {
    this.special = 'oh yeah man totally'
}

const instantiatedSpecialObject = new SuperSpecial()

const target = {
    someProperty: {
        cool: 'oh for sure'
    }
}

const source = {
    someProperty: instantiatedSpecialObject
}

const defaultOutput = merge(target, source)

defaultOutput.someProperty.cool // => 'oh for sure'
defaultOutput.someProperty.special // => 'oh yeah man totally'
defaultOutput.someProperty instanceof SuperSpecial // => false

const customMergeOutput = merge(target, source, {
    isMergeableObject: isPlainObject
})

customMergeOutput.someProperty.cool // => undefined
customMergeOutput.someProperty.special // => 'oh yeah man totally'
customMergeOutput.someProperty instanceof SuperSpecial // => true

const alex = {
  name: {
    first: 'Alex',
    last: 'Alexson'
  },
  pets: ['Cat', 'Parrot']
}

const tony = {
  name: {
    first: 'Tony',
    last: 'Tonison'
  },
  pets: ['Dog']
}

const mergeNames = (nameA, nameB) => `${nameA.first} and ${nameB.first}`

const options = {
  customMerge: (key) => {
    if (key === 'name') {
      return mergeNames
    }
  }
}

const result = merge(alex, tony, options)

result.name // => 'Alex and Tony'
result.pets // => ['Cat', 'Parrot', 'Dog']

---
name: Derek Worthen
age: 127
contact:
  email: [email protected]
  address: some location
pets:
  - cat
  - dog
  - bat
match: !!js/regexp /pattern/gim
run: !!js/function function() { }
---
Some Other content
var fs = require('fs');
var yamlFront = require('yaml-front-matter');

fs.readFile('./some/file.txt', 'utf8', function(fileContents) {
    console.log(yamlFront.loadFront(fileContents));
});

{ 
    name: 'Derek Worthen',
    age: 127,
    contact: { email: '[email protected]', address: 'some location' },
    pets: [ 'cat', 'dog', 'bat' ],
    match: /pattern/gim,
    run: [Function],
    __content: '
Some Other Content' 
}

---
{
    "name": "Derek Worthen",
    "age": "young",
    "anArray": ["one","two"],
    "subObj":{"field1": "one"}
}
---
Some content

$ npm install yaml-front-matter

$ npm install yaml-front-matter -g

var yamlFront = require('yaml-front-matter');

  // parse front matter with yamlFront.loadFront(String);

$ npm install --dev && npm start

$ npm install --dev && npm run build

npm install --dev && npm test

Usage: yaml-front-matter [options] 

Options:

-h, --help            output usage information
-v, --version         output the version number
-c, --content [name]  set the property name for the files contents [__content]
--pretty              formats json output with spaces. 

# Piping content from one file, through yaml parser and into another file
cat ./some/file.txt | yaml-front-matter > output.txt

var input = [
        '---
post: title one
',
        'anArray:
 - one
 - two
',
        'subObject:
 prop1: cool
 prop2: two',
        '
reg: !!js/regexp /pattern/gim',
        '
fun: !!js/function function() {  }
---
',
        'content
more'
    ].join('');

var results = yamlFront.loadFront(input);
console.log(results);

{ post: 'title one',
  anArray: [ 'one', 'two' ],
  subObject: { obj1: 'cool', obj2: 'two' },
  reg: /pattern/gim,
  fun: [Function],
  __content: '
content
more' }

yamlFront.loadFront('Hello World');
// => { __content: "Hello World!" }

yamlFront.loadFront('');
// => { __content: '' }

yamlFront.loadFront('Hello World', {
    contentKeyName: 'fileContents' 
});
// => { fileContents: "Hello World" }