Dezhu-util-snippets NPM

npm.io

How To Use NPM

npm install util-snippets --save
import { allEqual } from 'util-snippets'

How To Run Debugging Locally

git clone https://github.com/czero1995/util-snippets.git
cd util-snippets
npm install
npm run build

Test Online

https://codesandbox.io/s/serene-wilbur-6uy5q npm.io

NPM Package Url

https://www.npmjs.com/package/util-snippets

Document

getDaysDiffBetweenDates

randomIntArrayInRange

/**
 * This snippet checks whether all elements of the array are equal
 * allEqual([1, 2, 3, 4, 5, 6]); // false
 * allEqual([1, 1, 1, 1]); // true
 **/

const allEqual = arr => arr.every(val => val === arr[0]);

/**
 * This snippet returns the average of two or more numerical values.
 * average(...[1, 2, 3]); // 2
 * average(1, 2, 3); // 2
 */

const average = (...nums) => {
  return nums.reduce((acc, val) => acc + val, 0) / nums.length;
};

/**
 * This snippet checks whether the bottom of a page is visible.
 * bottomVisible(); // true
 */

const bottomVisible = () => document.documentElement.clientHeight + window.scrollY >=(document.documentElement.scrollHeight || document.documentElement.clientHeight);

/**
 * This snippet capitalizes the first letter of every word in a given string.
 * capitalizeEveryWord('hello world!'); // 'Hello World!'
 */

const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());

/**
 * This snippet converts a non-array value into array.
 * castArray('foo'); // ['foo']
 * castArray([1]); // [1]
 */

const castArray = val => (Array.isArray(val) ? val : [val]);

/**
 * This snippet removes false values from an array.
 * compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]); // 1,2
 * [1, 2, 3, "a", "s", 34]
 */

const compact = arr => arr.filter(Boolean);

/**
 * This snippet counts the occurrences of a value in an array.
 * countOccurrences([1, 1, 2, 1, 2, 3], 1); // 3
 */

const countOccurrences = (arr, val) => arr.reduce((a, v) => (v === val ? a + 1 : a), 0);

/**
 * This snippet returns the current URL.
 * currentURL(); // 'https://medium.com/@fatosmorina'
 */

const currentURL = () => window.location.href;

/**
 * This snippet finds the difference between two arrays.
 * difference([1, 2, 3], [1, 2, 4]); // [3]
 */

const difference = (a, b) => {
    const s = new Set(b);
    return a.filter(x => !s.has(x));
};

/**
 * This snippet removes duplicate values in an array.
 * filterNonUnique([1, 2, 2, 3, 4, 4, 5]); // [1, 2, 3, 4, 5]
 */

const filterNonUnique = arr => [...new Set(arr)];

/**
 *This snippet executes a function for each element of an array starting from the array’s last element.
 * forEachRight([1, 2, 3, 4], val => console.log(val)); // '4', '3', '2', '1'
 */

const forEachRight = arr => {
    return arr.slice(0).reverse();
};

/**
 * This snippet can be used to get the time from a Date object as a string.
 * getColonTimeFromDate(new Date()); // "08:38:00"
 */

const getColonTimeFromDate = date => date.toTimeString().slice(0, 8);

/**
 * This snippet can be used to find the difference in days between two dates.
 * getDaysDiffBetweenDates(new Date('2019-01-13'), new Date('2019-01-15')); // 2
 */

const getDaysDiffBetweenDates = (dateInitial, dateFinal) => (dateFinal - dateInitial) / (1000 _ 3600 _ 24);

/**
 * This snippet can be used to redirect from HTTP to HTTPS in a particular domain.
 * httpsRedirect(); // If you are on http://mydomain.com, you are redirected to https://mydomain.com
 */

const httpsRedirect = () => {
    if (location.protocol !== "https:")
    location.replace("https://" + location.href.split("//")[1]);
};

/**
 * This snippet can be used to get an array with elements that are included in two other arrays.
 * intersection([1, 2, 3], [4, 3, 2]); // [2, 3]
 */

const intersection = (a, b) => {
    const s = new Set(b);
    return a.filter(x => s.has(x));
};

/**
 * This snippet can be used to check whether a date is after another date.
 * isAfterDate(new Date(2010, 10, 21), new Date(2010, 10, 20)); // true
 */

const isAfterDate = (dateA, dateB) => dateA > dateB;

/**
 * This snippet can be used to check whether a date is before another date.
 * isBeforeDate(new Date(2010, 10, 20), new Date(2010, 10, 21)); // true
 */

const isBeforeDate = (dateA, dateB) => dateA < dateB;

/**
 * This snippet can be used to determine whether the current runtime environment is a browser. This is helpful for avoiding errors when running front-end modules on the server (Node).
 * isBrowser(); // true (browser)
 * isBrowser(); // false (Node)
 */

const isBrowser = () => ![typeof window, typeof document].includes("undefined");

/**
 * This snippet can be used to determine whether a string is lower case.
 * isLowerCase('abc'); // true
 * isLowerCase('a3@$'); // true
 * isLowerCase('Ab4'); // false
 */

const isLowerCase = str => str === str.toLowerCase();

/**
 * This snippet can be used to check whether a value is null or undefined.
 * isNil(null); // true
 * isNil(undefined); // true
 */

const isNil = val => val === undefined || val === null;

/**
 * This snippet can be used to check whether a value is null.
 * isNull(null); // true
 */

const isNull = val => val === null;

/**
 * This snippet can be used to check whether a date is before another date.
 * isSameDate(new Date(2010, 10, 20), new Date(2010, 10, 20)); // true
 */

const isSameDate = (dateA, dateB) => dateA.toISOString() === dateB.toISOString();

/**
 * This snippet can be used to check whether a string is a valid JSON.
 * isValidJSON('{"name":"Adam","age":20}'); // true
 * isValidJSON('{"name":"Adam",age:"20"}'); // false
 * isValidJSON(null); // true
 */

const isValidJSON = str => {
    try {
        JSON.parse(str);
        return true;
    } catch (e) {
        return false;
    }
};

/**
 * This snippet returns the n largest elements from a list. If n is greater than or equal to the list’s length, then it will return the original list (sorted in descending order).
 * maxN([1, 2, 3]); // [3]
 * maxN([1, 2, 3], 2); // [3,2]
 */

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

/**
 * This snippet returns the n smallest elements from a list. If n is greater than or equal to the list’s length, then it will return the original list (sorted in ascending order).
 * minN([1, 2, 3]); // [1]
 * minN([1, 2, 3], 2); // [1,2]
 */

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

/**
 * This snippet can be used to generate a random hexadecimal color code.
 * randomHexColorCode(); // "#e34155"
 */

const randomHexColorCode = () => {
    let n = (Math.random() _ 0xfffff _ 1000000).toString(16);
    return "#" + n.slice(0, 6);
};

/**
 * This snippet can be used to generate an array with n random integers in a specified range.
 * randomIntArrayInRange(12, 35, 10); // [ 34, 14, 27, 17, 30, 27, 20, 26, 21, 14 ]
 */

const randomIntArrayInRange = (min, max, n = 1) =>
    Array.from(
    { length: n },
    () => Math.floor(Math.random() \* (max - min + 1)) + min
);

/**
 * This snippet can be used to generate a random integer in a specified range.
 * randomIntegerInRange(0, 5); // 3
 */

const randomIntegerInRange = (min, max) => Math.floor(Math.random() \* (max - min + 1)) + min;

/**
 * This snippet can be used to return a random number in a specified range.
 * randomNumberInRange(2, 10); // 6.0211363285087005
 */

const randomNumberInRange = (min, max) => Math.random() \* (max - min) + min;

/**
 * This snippet can be used to do a redirect to a specified URL.
 * redirect('https://google.com');
 */

const redirect = (url, asLink = true) => asLink ? (window.location.href = url) : window.location.replace(url);

/**
 * This snippet can be used to get a random number from an array.
 * sample([3, 7, 9, 11]); // 9
 */

const sample = arr => arr[Math.floor(Math.random() * arr.length)];

/**
 * This snippet can be used to do a smooth scroll to the top of the current page.
 * scrollToTop();
 */

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

/**
 * This snippet can be used to delay the execution of an asynchronous function by putting it into sleep.
 * async function sleepyWork() {
  console.log("I'm going to sleep for 1 second.");
  await sleep(1000);
  console.log('I woke up after 1 second.');
}
 */

const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));

/**
 * This snippet can be used to smoothly scroll the element on which it is called into the visible area of the browser window.
 * smoothScroll('#fooBar'); // scrolls smoothly to the element with the id fooBar
 * smoothScroll('.fooBar'); // scrolls smoothly to the first element with a class of fooBar
 */

const smoothScroll = element =>
    document.querySelector(element).scrollIntoView({
    behavior: "smooth"
});

/**
 * This snippet can be used to find the sum of two or more numbers or arrays.
 * sum(1, 2, 3, 4); // 10
 * sum(...[1, 2, 3, 4]); // 10
 */

const sum = (...arr) => {
    return [...arr].reduce((acc, val) => acc + val, 0);
};

/**
 * This snippet can be used to find the union of two arrays, resulting in an array that has elements that come from both arrays but that do not repeat.
 * union([1, 2, 3], [4, 3, 2]); // [1,2,3,4]
 */

const union = (a, b) => Array.from(new Set([...a, ...b]));

/**
 * This snippet uses ES6 Set and the …rest operator to get every element only once.
 * uniqueElements([1, 2, 2, 3, 4, 4, 5]); // [1, 2, 3, 4, 5]
 */

const uniqueElements = arr => [...new Set(arr)];

/**
 * This snippet can be used to determine whether the current runtime environment is  Android.
 * isAndroid() // true
 */

const isAndroid = () => {
const ua = navigator.userAgent.toLowerCase();
return ua.indexOf("Android") > -1 || ua.indexOf("Adr") > -1;
};

/**
 * This snippet can be used to determine whether the current runtime environment is iOS .
 * isAndroid() // true
 */

const isIos = () => {
const ua = navigator.userAgent;
return !!ua.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
};

Reference Article

Util TypeScript NodeJS

tslib

@everything-registry/sub-chunk-1475 @infinitebrahmanuniverse/nolb-dez

1.0.0

4 years ago