30S.js（記錄）

Array begin
****獲取數(shù)組中最大的值
const spreadOver = fn => argsArr => fn(...argsArr);
EXAMPLES
const arrayMax = spreadOver(Math.max);
arrayMax([1, 2, 3]); // 3

****將數(shù)組中的字符串轉(zhuǎn)化為數(shù)字型
const unary = fn => val => fn(val);
EXAMPLES
['6', '8', '10'].map(unary(parseInt)); // [6, 8, 10]

****判斷數(shù)組里的值是否一樣
const allEqual = arr => arr.every(val => val === arr[0]);
EXAMPLES
allEqual([1, 2, 3, 4, 5, 6]); // false
allEqual([1, 1, 1, 1]); // true

****將多級數(shù)組拉到指定的層級
const chunk = (arr, size) =>
Array.from({ length: Math.ceil(arr.length / size) }, (v, i) =>
    arr.slice(i * size, i * size + size)
);
EXAMPLES
chunk([1, 2, 3, 4, 5], 2); // [[1,2],[3,4],[5]]

****將多級數(shù)組拉成一層層級
const deepFlatten = arr => [].concat(...arr.map(v => (Array.isArray(v) ? deepFlatten(v) : v)));
EXAMPLES
deepFlatten([1, [2], [[3], 4], 5]); // [1,2,3,4,5]

****比較兩個(gè)數(shù)組抖甘，返回第一個(gè)參數(shù)數(shù)組里不同的值
const difference = (a, b) => {
  const s = new Set(b);
  return a.filter(x => !s.has(x));
};
EXAMPLES
difference([1, 2, 3], [1, 2, 4]); // [3]

const differenceBy = (a, b, fn) => {
  const s = new Set(b.map(fn));
  return a.map(fn).filter(el => !s.has(el));
};
EXAMPLES
differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor); // [1]
differenceBy([{ x: 2 }, { x: 1 }], [{ x: 1 }], v => v.x); // [2]

const drop = (arr, n = 1) => arr.slice(n);
EXAMPLES
drop([1, 2, 3]); // [2,3]
drop([1, 2, 3], 2); // [3]
drop([1, 2, 3], 42); // []

const dropRight = (arr, n = 1) => arr.slice(0, -n);
EXAMPLES
dropRight([1, 2, 3]); // [1,2]
dropRight([1, 2, 3], 2); // [1]
dropRight([1, 2, 3], 42); // []

const flatten = (arr, depth = 1) =>
arr.reduce((a, v) => a.concat(depth > 1 && Array.isArray(v) ? flatten(v, depth - 1) : v), []);
EXAMPLES
flatten([1, [2], 3, 4]); // [1, 2, 3, 4]
flatten([1, [2, [3, [4, 5], 6], 7], 8], 2); // [1, 2, 3, [4, 5], 6, 7, 8]

const forEachRight = (arr, callback) =>
    arr
    .slice(0)
    .reverse()
    .forEach(callback);
EXAMPLES
forEachRight([1, 2, 3, 4], val => console.log(val)); // '4', '3', '2', '1'

const includesAll = (arr, values) => values.every(v => arr.includes(v));
EXAMPLES
includesAll([1, 2, 3, 4], [1, 4]); // true
includesAll([1, 2, 3, 4], [1, 5]); // false

const includesAny = (arr, values) => values.some(v => arr.includes(v));
EXAMPLES
includesAny([1, 2, 3, 4], [2, 9]); // true
includesAny([1, 2, 3, 4], [8, 9]); // false

const isSorted = arr => {
  let direction = -(arr[0] - arr[1]);
  for (let [i, val] of arr.entries()) {
    direction = !direction ? -(arr[i - 1] - arr[i]) : direction;
    if (i === arr.length - 1) return !direction ? 0 : direction;
    else if ((val - arr[i + 1]) * direction > 0) return 0;
  }
};
EXAMPLES
isSorted([0, 1, 2, 2]); // 1
isSorted([4, 3, 2]); // -1
isSorted([4, 3, 5]); // 0

const longestItem = (...vals) => vals.reduce((a, x) => (x.length > a.length ? x : a));
EXAMPLES
longestItem('this', 'is', 'a', 'testcase'); // 'testcase'
longestItem(...['a', 'ab', 'abc']); // 'abc'
longestItem(...['a', 'ab', 'abc'], 'abcd'); // 'abcd'
longestItem([1, 2, 3], [1, 2], [1, 2, 3, 4, 5]); // [1, 2, 3, 4, 5]
longestItem([1, 2, 3], 'foobar'); // 'foobar'

const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);
EXAMPLES
maxN([1, 2, 3]); // [3]
maxN([1, 2, 3], 2); // [3,2]

const minN = (arr, n = 1) => [...arr].sort((a, b) => a - b).slice(0, n);
EXAMPLES
minN([1, 2, 3]); // [1]
minN([1, 2, 3], 2); // [1,2]

const reducedFilter = (data, keys, fn) =>
    data.filter(fn).map(el =>
    keys.reduce((acc, key) => {
      acc[key] = el[key];
      return acc;
    }, {})
);
EXAMPLES
const data = [
  {
    id: 1,
    name: 'john',
    age: 24
  },
  {
    id: 2,
    name: 'mike',
    age: 50
  }
];
reducedFilter(data, ['id', 'name'], item => item.age > 24); // [{ id: 2, name: 'mike'}]


const similarity = (arr, values) => arr.filter(v => values.includes(v));
EXAMPLES
similarity([1, 2, 3], [1, 2, 4]); // [1, 2]


const union = (a, b) => Array.from(new Set([...a, ...b]));
EXAMPLES
union([1, 2, 3], [4, 3, 2]); // [1,2,3,4]


const uniqueElementsByRight = (arr, fn) =>
  arr.reduceRight((acc, v) => {
    if (!acc.some(x => fn(v, x))) acc.push(v);
    return acc;
  }, []);

EXAMPLES
uniqueElementsByRight(
  [
    { id: 0, value: 'a' },
    { id: 1, value: 'b' },
    { id: 2, value: 'c' },
    { id: 1, value: 'd' },
    { id: 0, value: 'e' }
  ],
  (a, b) => a.id == b.id
); // [ { id: 0, value: 'e' }, { id: 1, value: 'd' }, { id: 2, value: 'c' } ]
Browser begin
const bottomVisible = () =>
  document.documentElement.clientHeight + window.scrollY >=
  (document.documentElement.scrollHeight || document.documentElement.clientHeight);

const copyToClipboard = str => {
  const el = document.createElement('textarea');
  el.value = str;
  el.setAttribute('readonly', '');
  el.style.position = 'absolute';
  el.style.left = '-9999px';
  document.body.appendChild(el);
  const selected =
    document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false;
  el.select();
  document.execCommand('copy');
  document.body.removeChild(el);
  if (selected) {
    document.getSelection().removeAllRanges();
    document.getSelection().addRange(selected);
  }
};
EXAMPLES
copyToClipboard('Lorem ipsum'); // 'Lorem ipsum' copied to clipboard.

const detectDeviceType = () =>
  /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
    ? 'Mobile'
    : 'Desktop';

EXAMPLES
detectDeviceType(); // "Mobile" or "Desktop"

const getScrollPosition = (el = window) => ({
  x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft,
  y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop
});

EXAMPLES
getScrollPosition(); // {x: 0, y: 200}

const scrollToTop = () => {
  const c = document.documentElement.scrollTop || document.body.scrollTop;
  if (c > 0) {
    window.requestAnimationFrame(scrollToTop);
    window.scrollTo(0, c - c / 8);
  }
};

EXAMPLES
scrollToTop();
DATE begin
const getDaysDiffBetweenDates = (dateInitial, dateFinal) =>
  (dateFinal - dateInitial) / (1000 * 3600 * 24);

EXAMPLES
getDaysDiffBetweenDates(new Date('2017-12-13'), new Date('2017-12-22')); // 9


const isAfterDate = (dateA, dateB) => dateA > dateB;
EXAMPLES
isAfterDate(new Date(2010, 10, 21), new Date(2010, 10, 20)); // true

const isBeforeDate = (dateA, dateB) => dateA < dateB;
EXAMPLES
isBeforeDate(new Date(2010, 10, 20), new Date(2010, 10, 21)); // true


const isWeekday = (t = new Date()) => {
  return t.getDay() % 6 !== 0;
};
EXAMPLES
isWeekday(); // true (if current date is 2019-07-19)

const isWeekend = (t = new Date()) => {
  return t.getDay() % 6 === 0;
};
EXAMPLES
isWeekend(); // 2018-10-19 (if current date is 2018-10-18)


const tomorrow = () => {
  let t = new Date();
  t.setDate(t.getDate() + 1);
  return t.toISOString().split('T')[0];
};
EXAMPLES
tomorrow(); // 2018-10-19 (if current date is 2018-10-18)

const yesterday = () => {
  let t = new Date();
  t.setDate(t.getDate() - 1);
  return t.toISOString().split('T')[0];
};
EXAMPLES
yesterday(); // 2018-10-17 (if current date is 2018-10-18)
Math begin
const average = (...nums) => nums.reduce((acc, val) => acc + val, 0) / nums.length;
EXAMPLES
average(...[1, 2, 3]); // 2
average(1, 2, 3); // 2

const isNegativeZero = val => val === 0 && 1 / val === -Infinity;
EXAMPLES
isNegativeZero(-0); // true
isNegativeZero(0); // false

const round = (n, decimals = 0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);
EXAMPLES
round(1.005, 2); // 1.01
Object begin
const dig = (obj, target) =>
  target in obj
    ? obj[target]
    : Object.values(obj).reduce((acc, val) => {
      if (acc !== undefined) return acc;
      if (typeof val === 'object') return dig(val, target);
    }, undefined);

EXAMPLES
const data = {
  level1: {
    level2: {
      level3: 'some data'
    }
  }
};
dig(data, 'level3'); // 'some data'
dig(data, 'level4'); // undefined


const equals = (a, b) => {
  if (a === b) return true;
  if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();
  if (!a || !b || (typeof a !== 'object' && typeof b !== 'object')) return a === b;
  if (a.prototype !== b.prototype) return false;
  let keys = Object.keys(a);
  if (keys.length !== Object.keys(b).length) return false;
  return keys.every(k => equals(a[k], b[k]));
};
EXAMPLES
equals({ a: [2, { e: 3 }], b: [4], c: 'foo' }, { a: [2, { e: 3 }], b: [4], c: 'foo' }); // true


const findKey = (obj, fn) => Object.keys(obj).find(key => fn(obj[key], key, obj));
EXAMPLES
findKey(
  {
    barney: { age: 36, active: true },
    fred: { age: 40, active: false },
    pebbles: { age: 1, active: true }
  },
  o => o['active']
); // 'barney'


const findLastKey = (obj, fn) =>
  Object.keys(obj)
    .reverse()
    .find(key => fn(obj[key], key, obj));

EXAMPLES
findLastKey(
  {
    barney: { age: 36, active: true },
    fred: { age: 40, active: false },
    pebbles: { age: 1, active: true }
  },
  o => o['active']
); // 'pebbles'



const hasKey = (obj, keys) => {
  return (
    keys.length > 0 &&
    keys.every(key => {
      if (typeof obj !== 'object' || !obj.hasOwnProperty(key)) return false;
      obj = obj[key];
      return true;
    })
  );
};

EXAMPLES
let obj = {
  a: 1,
  b: { c: 4 },
  'b.d': 5
};
hasKey(obj, ['a']); // true
hasKey(obj, ['b']); // true
hasKey(obj, ['b', 'c']); // true
hasKey(obj, ['b.d']); // true
hasKey(obj, ['d']); // false
hasKey(obj, ['c']); // false
hasKey(obj, ['b', 'f']); // false


const matches = (obj, source) =>
  Object.keys(source).every(key => obj.hasOwnProperty(key) && obj[key] === source[key]);

EXAMPLES
matches({ age: 25, hair: 'long', beard: true }, { hair: 'long', beard: true }); // true
matches({ hair: 'long', beard: true }, { age: 25, hair: 'long', beard: true }); // false


const merge = (...objs) =>
  [...objs].reduce(
    (acc, obj) =>
      Object.keys(obj).reduce((a, k) => {
        acc[k] = acc.hasOwnProperty(k) ? [].concat(acc[k]).concat(obj[k]) : obj[k];
        return acc;
      }, {}),
    {}
  );

EXAMPLES
const object = {
  a: [{ x: 2 }, { y: 4 }],
  b: 1
};
const other = {
  a: { z: 3 },
  b: [2, 3],
  c: 'foo'
};
merge(object, other); // { a: [ { x: 2 }, { y: 4 }, { z: 3 } ], b: [ 1, 2, 3 ], c: 'foo' }


const objectFromPairs = arr => arr.reduce((a, [key, val]) => ((a[key] = val), a), {});
EXAMPLES
objectFromPairs([['a', 1], ['b', 2]]); // {a: 1, b: 2}


const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);

EXAMPLES
objectToPairs({ a: 1, b: 2 }); // [ ['a', 1], ['b', 2] ]


const omit = (obj, arr) =>
  Object.keys(obj)
    .filter(k => !arr.includes(k))
    .reduce((acc, key) => ((acc[key] = obj[key]), acc), {});

EXAMPLES
omit({ a: 1, b: '2', c: 3 }, ['b']); // { 'a': 1, 'c': 3 }


const pick = (obj, arr) =>
  arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {});

EXAMPLES
pick({ a: 1, b: '2', c: 3 }, ['a', 'c']); // { 'a': 1, 'c': 3 }


const renameKeys = (keysMap, obj) =>
  Object.keys(obj).reduce(
    (acc, key) => ({
      ...acc,
      ...{ [keysMap[key] || key]: obj[key] }
    }),
    {}
  );

EXAMPLES
const obj = { name: 'Bobo', job: 'Front-End Master', shoeSize: 100 };
renameKeys({ name: 'firstName', job: 'passion' }, obj); // { firstName: 'Bobo', passion: 'Front-End Master', shoeSize: 100 }


const size = val =>
  Array.isArray(val)
    ? val.length
    : val && typeof val === 'object'
    ? val.size || val.length || Object.keys(val).length
    : typeof val === 'string'
    ? new Blob([val]).size
    : 0;

EXAMPLES
size([1, 2, 3, 4, 5]); // 5
size('size'); // 4
size({ one: 1, two: 2, three: 3 }); // 3
string begin
const byteSize = str => new Blob([str]).size;
EXAMPLES
byteSize('??'); // 4
byteSize('Hello World'); // 11


const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());
EXAMPLES
capitalizeEveryWord('hello world!'); // 'Hello World!'


const compactWhitespace = str => str.replace(/\s{2,}/g, ' ');
EXAMPLES
compactWhitespace('Lorem    Ipsum'); // 'Lorem Ipsum'
compactWhitespace('Lorem \n Ipsum'); // 'Lorem Ipsum'


const decapitalize = ([first, ...rest], upperRest = false) =>
  first.toLowerCase() + (upperRest ? rest.join('').toUpperCase() : rest.join(''));

EXAMPLES
decapitalize('FooBar'); // 'fooBar'
decapitalize('FooBar', true); // 'fOOBAR'


const fromCamelCase = (str, separator = '_') =>
  str
    .replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2')
    .replace(/([A-Z]+)([A-Z][a-z\d]+)/g, '$1' + separator + '$2')
    .toLowerCase();

EXAMPLES
fromCamelCase('someDatabaseFieldName', ' '); // 'some database field name'
fromCamelCase('someLabelThatNeedsToBeCamelized', '-'); // 'some-label-that-needs-to-be-camelized'
fromCamelCase('someJavascriptProperty', '_'); // 'some_javascript_property'


const indentString = (str, count, indent = ' ') => str.replace(/^/gm, indent.repeat(count));

EXAMPLES
indentString('Lorem\nIpsum', 2); // '  Lorem\n  Ipsum'
indentString('Lorem\nIpsum', 2, '_'); // '__Lorem\n__Ipsum'


const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str);
EXAMPLES
isAbsoluteURL('https://google.com'); // true
isAbsoluteURL('ftp://www.myserver.net'); // true
isAbsoluteURL('/foo/bar'); // false


const isAnagram = (str1, str2) => {
  const normalize = str =>
    str
      .toLowerCase()
      .replace(/[^a-z0-9]/gi, '')
      .split('')
      .sort()
      .join('');
  return normalize(str1) === normalize(str2);
};

EXAMPLES
isAnagram('iceman', 'cinema'); // true

const isLowerCase = str => str === str.toLowerCase();
EXAMPLES
isLowerCase('abc'); // true
isLowerCase('a3@$'); // true
isLowerCase('Ab4'); // false


const isUpperCase = str => str === str.toUpperCase();
EXAMPLES
isUpperCase('ABC'); // true
isUpperCase('A3@$'); // true
isUpperCase('aB4'); // false


const mapString = (str, fn) =>
  str
    .split('')
    .map((c, i) => fn(c, i, str))
    .join('');
EXAMPLES
mapString('lorem ipsum', c => c.toUpperCase()); // 'LOREM IPSUM'


const mask = (cc, num = 4, mask = '*') => `${cc}`.slice(-num).padStart(`${cc}`.length, mask);
EXAMPLES
mask(1234567890); // '******7890'
mask(1234567890, 3); // '*******890'
mask(1234567890, -4, '$'); // '$$$$567890'


const splitLines = str => str.split(/\r?\n/);
EXAMPLES
splitLines('This\nis a\nmultiline\nstring.\n'); // ['This', 'is a', 'multiline', 'string.' , '']

const stripHTMLTags = str => str.replace(/<[^>]*>/g, '');
EXAMPLES
stripHTMLTags('<p><em>lorem</em> <strong>ipsum</strong></p>'); // 'lorem ipsum'


const toCamelCase = str => {
  let s =
    str &&
    str
      .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
      .map(x => x.slice(0, 1).toUpperCase() + x.slice(1).toLowerCase())
      .join('');
  return s.slice(0, 1).toLowerCase() + s.slice(1);
};
EXAMPLES
toCamelCase('some_database_field_name'); // 'someDatabaseFieldName'
toCamelCase('Some label that needs to be camelized'); // 'someLabelThatNeedsToBeCamelized'
toCamelCase('some-javascript-property'); // 'someJavascriptProperty'
toCamelCase('some-mixed_string with spaces_underscores-and-hyphens'); // 'someMixedStringWithSpacesUnderscoresAndHyphens'


const toKebabCase = str =>
  str &&
  str
    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
    .map(x => x.toLowerCase())
    .join('-');
EXAMPLES
toKebabCase('camelCase'); // 'camel-case'
toKebabCase('some text'); // 'some-text'
toKebabCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some-mixed-string-with-spaces-underscores-and-hyphens'
toKebabCase('AllThe-small Things'); // "all-the-small-things"
toKebabCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i-am-listening-to-fm-while-loading-different-url-on-my-browser-and-also-editing-xml-and-html"


const toSnakeCase = str =>
  str &&
  str
    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
    .map(x => x.toLowerCase())
    .join('_');
EXAMPLES
toSnakeCase('camelCase'); // 'camel_case'
toSnakeCase('some text'); // 'some_text'
toSnakeCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some_mixed_string_with_spaces_underscores_and_hyphens'
toSnakeCase('AllThe-small Things'); // "all_the_smal_things"
toSnakeCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i_am_listening_to_fm_while_loading_different_url_on_my_browser_and_also_editing_some_xml_and_html"


const toTitleCase = str =>
  str
    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
    .map(x => x.charAt(0).toUpperCase() + x.slice(1))
    .join(' ');
EXAMPLES
toTitleCase('some_database_field_name'); // 'Some Database Field Name'
toTitleCase('Some label that needs to be title-cased'); // 'Some Label That Needs To Be Title Cased'
toTitleCase('some-package-name'); // 'Some Package Name'
toTitleCase('some-mixed_string with spaces_underscores-and-hyphens'); // 'Some Mixed String With Spaces Underscores And Hyphens'



const truncateString = (str, num) =>
  str.length > num ? str.slice(0, num > 3 ? num - 3 : num) + '...' : str;
EXAMPLES
truncateString('boomerang', 7); // 'boom...'



const words = (str, pattern = /[^a-zA-Z-]+/) => str.split(pattern).filter(Boolean);
EXAMPLES
words('I love javaScript!!'); // ["I", "love", "javaScript"]
words('python, javaScript & coffee'); // ["python", "javaScript", "coffee"]

// string end


// Type begin
const isNumber = val => typeof val === 'number' && val === val;
EXAMPLES
isNumber(1); // true
isNumber('1'); // false
isNumber(NaN); // false


const isObject = obj => obj === Object(obj);
EXAMPLES
isObject([1, 2, 3, 4]); // true
isObject([]); // true
isObject(['Hello!']); // true
isObject({ a: 1 }); // true
isObject({}); // true
isObject(true); // false


const isObjectLike = val => val !== null && typeof val === 'object';
EXAMPLES
isObjectLike({}); // true
isObjectLike([1, 2, 3]); // true
isObjectLike(x => x); // false
isObjectLike(null); // false

// Type end


// Utility begin
const getURLParameters = url =>
  (url.match(/([^?=&]+)(=([^&]*))/g) || []).reduce(
    (a, v) => ((a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a),
    {}
  );
EXAMPLES
getURLParameters('http://url.com/page?name=Adam&surname=Smith'); // {name: 'Adam', surname: 'Smith'}
getURLParameters('google.com'); // {}


const hexToRGB = hex => {
  let alpha = false,
    h = hex.slice(hex.startsWith('#') ? 1 : 0);
  if (h.length === 3) h = [...h].map(x => x + x).join('');
  else if (h.length === 8) alpha = true;
  h = parseInt(h, 16);
  return (
    'rgb' +
    (alpha ? 'a' : '') +
    '(' +
    (h >>> (alpha ? 24 : 16)) +
    ', ' +
    ((h & (alpha ? 0x00ff0000 : 0x00ff00)) >>> (alpha ? 16 : 8)) +
    ', ' +
    ((h & (alpha ? 0x0000ff00 : 0x0000ff)) >>> (alpha ? 8 : 0)) +
    (alpha ? `, ${h & 0x000000ff}` : '') +
    ')'
  );
};
EXAMPLES
hexToRGB('#27ae60ff'); // 'rgba(39, 174, 96, 255)'
hexToRGB('27ae60'); // 'rgb(39, 174, 96)'
hexToRGB('#fff'); // 'rgb(255, 255, 255)'


const RGBToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
EXAMPLES
RGBToHex(255, 165, 1); // 'ffa501'


const objectToQueryString = queryParameters => {
  return queryParameters
    ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {
        const symbol = index === 0 ? '?' : '&';
        queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';
        return queryString;
      }, '')
    : '';
};
EXAMPLES
objectToQueryString({ page: '1', size: '2kg', key: undefined }); // '?page=1&size=2kg'


const parseCookie = str =>
  str
    .split(';')
    .map(v => v.split('='))
    .reduce((acc, v) => {
      acc[decodeURIComponent(v[0].trim())] = decodeURIComponent(v[1].trim());
      return acc;
    }, {});
EXAMPLES
parseCookie('foo=bar; equation=E%3Dmc%5E2'); // { foo: 'bar', equation: 'E=mc^2' }


const toCurrency = (n, curr, LanguageFormat = undefined) =>
  Intl.NumberFormat(LanguageFormat, { style: 'currency', currency: curr }).format(n);
EXAMPLES
toCurrency(123456.789, 'EUR'); // €123,456.79  | currency: Euro | currencyLangFormat: Local
toCurrency(123456.789, 'USD', 'en-us'); // $123,456.79  | currency: US Dollar | currencyLangFormat: English (United States)
toCurrency(123456.789, 'USD', 'fa'); // ?????????? ?$ | currency: US Dollar | currencyLangFormat: Farsi
toCurrency(322342436423.2435, 'JPY'); // ￥322,342,436,423 | currency: Japanese Yen | currencyLangFormat: Local
toCurrency(322342436423.2435, 'JPY', 'fi'); // 322 342 436 423 ￥ | currency: Japanese Yen | currencyLangFormat: Finnish


const toDecimalMark = num => num.toLocaleString('en-US');
EXAMPLES
toDecimalMark(12305030388.9087); // "12,305,030,388.909"


const validateNumber = n => !isNaN(parseFloat(n)) && isFinite(n) && Number(n) == n;
EXAMPLES
validateNumber('10'); // true
// Utility end
最后編輯于 ：
?著作權(quán)歸作者所有,轉(zhuǎn)載或內(nèi)容合作請聯(lián)系作者
  • 人面猴
    序言：七十年代末寄雀，一起剝皮案震驚了整個(gè)濱河市纳令，隨后出現(xiàn)的幾起案子怀薛，更是在濱河造成了極大的恐慌逻炊，老刑警劉巖架专，帶你破解...
    沈念sama閱讀 217,734評論 6贊 505
  • 死咒
    序言：濱河連續(xù)發(fā)生了三起死亡事件秉犹，死亡現(xiàn)場離奇詭異乐设，居然都是意外死亡，警方通過查閱死者的電腦和手機(jī)灸拍，發(fā)現(xiàn)死者居然都...
    沈念sama閱讀 92,931評論 3贊 394
  • 救了他兩次的神仙讓他今天三更去死
    文/潘曉璐 我一進(jìn)店門做祝，熙熙樓的掌柜王于貴愁眉苦臉地迎上來，“玉大人鸡岗，你說我怎么就攤上這事剖淀。” “怎么了纤房？”我有些...
    開封第一講書人閱讀 164,133評論 0贊 354
  • 道士緝兇錄：失蹤的賣姜人
    文/不壞的土叔 我叫張陵，是天一觀的道長翻诉。 經(jīng)常有香客問我炮姨，道長，這世上最難降的妖魔是什么碰煌？ 我笑而不...
    開封第一講書人閱讀 58,532評論 1贊 293
  • ?港島之戀（遺憾婚禮）
    正文 為了忘掉前任舒岸，我火速辦了婚禮，結(jié)果婚禮上芦圾，老公的妹妹穿的比我還像新娘蛾派。我一直安慰自己，他們只是感情好个少，可當(dāng)我...
    茶點(diǎn)故事閱讀 67,585評論 6贊 392
  • 惡毒庶女頂嫁案：這布局不是一般人想出來的
    文/花漫 我一把揭開白布洪乍。 她就那樣靜靜地躺著，像睡著了一般夜焦。 火紅的嫁衣襯著肌膚如雪壳澳。 梳的紋絲不亂的頭發(fā)上，一...
    開封第一講書人閱讀 51,462評論 1贊 302
  • 城市分裂傳說
    那天茫经，我揣著相機(jī)與錄音巷波，去河邊找鬼。 笑死卸伞，一個(gè)胖子當(dāng)著我的面吹牛抹镊，可吹牛的內(nèi)容都是我干的。 我是一名探鬼主播荤傲，決...
    沈念sama閱讀 40,262評論 3贊 418
  • 雙鴛鴦連環(huán)套：你想象不到人心有多黑
    文/蒼蘭香墨 我猛地睜開眼垮耳，長吁一口氣：“原來是場噩夢啊……” “哼！你這毒婦竟也來了遂黍？” 一聲冷哼從身側(cè)響起氨菇，我...
    開封第一講書人閱讀 39,153評論 0贊 276
  • 萬榮殺人案實(shí)錄
    序言：老撾萬榮一對情侶失蹤儡炼，失蹤者是張志新（化名）和其女友劉穎，沒想到半個(gè)月后查蓉，有當(dāng)?shù)厝嗽跇淞掷锇l(fā)現(xiàn)了一具尸體乌询，經(jīng)...
    沈念sama閱讀 45,587評論 1贊 314
  • ?護(hù)林員之死
    正文 獨(dú)居荒郊野嶺守林人離奇死亡，尸身上長有42處帶血的膿包…… 初始之章·張勛 以下內(nèi)容為張勛視角 年9月15日...
    茶點(diǎn)故事閱讀 37,792評論 3贊 336
  • ?白月光啟示錄
    正文 我和宋清朗相戀三年豌研，在試婚紗的時(shí)候發(fā)現(xiàn)自己被綠了妹田。 大學(xué)時(shí)的朋友給我發(fā)了我未婚夫和他白月光在一起吃飯的照片。...
    茶點(diǎn)故事閱讀 39,919評論 1贊 348
  • 活死人
    序言：一個(gè)原本活蹦亂跳的男人離奇死亡鹃共，死狀恐怖鬼佣，靈堂內(nèi)的尸體忽然破棺而出，到底是詐尸還是另有隱情霜浴，我是刑警寧澤晶衷，帶...
    沈念sama閱讀 35,635評論 5贊 345
  • ?日本核電站爆炸內(nèi)幕
    正文 年R本政府宣布，位于F島的核電站阴孟，受9級特大地震影響晌纫，放射性物質(zhì)發(fā)生泄漏。R本人自食惡果不足惜永丝，卻給世界環(huán)境...
    茶點(diǎn)故事閱讀 41,237評論 3贊 329
  • 男人毒藥：我在死后第九天來索命
    文/蒙蒙 一锹漱、第九天 我趴在偏房一處隱蔽的房頂上張望。 院中可真熱鬧慕嚷，春花似錦哥牍、人聲如沸。這莊子的主人今日做“春日...
    開封第一講書人閱讀 31,855評論 0贊 22
  • 一樁弒父案嗅辣，背后竟有這般陰謀
    文/蒼蘭香墨 我抬頭看了看天上的太陽。三九已至挠说，卻和暖如春辩诞，著一層夾襖步出監(jiān)牢的瞬間，已是汗流浹背纺涤。 一陣腳步聲響...
    開封第一講書人閱讀 32,983評論 1贊 269
  • 情欲美人皮
    我被黑心中介騙來泰國打工译暂， 沒想到剛下飛機(jī)就差點(diǎn)兒被人妖公主榨干…… 1. 我叫王不留，地道東北人撩炊。 一個(gè)月前我還...
    沈念sama閱讀 48,048評論 3贊 370
  • 代替公主和親
    正文 我出身青樓外永，卻偏偏與公主長得像，于是被迫代替她去往敵國和親拧咳。 傳聞我的和親對象是個(gè)殘疾皇子伯顶，可洞房花燭夜當(dāng)晚...
    茶點(diǎn)故事閱讀 44,864評論 2贊 354