iceener

class Avenger {
  constructor(name) {
    this.name = name;
  }
}

const hero = new Avenger("Steve Rogers");

hero.name; /*?*/

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// Destructuring
const args = [1, 2, 3, 4];
const [a, b, c, d] = args;
console.log(a, b, c, d);

const coords = { x: 1, y: 10 };
const { x: horizontal, y } = coords;
horizontal; /*?*/
y; /*?*/

iceener

// Array to CSV data
const csvContent = result.map(e => e.join(",")).join("\n");

copy(csvContent)

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// Capitalize all words of a string
function capitalize(string) {
	return string.replace(/\b[a-z]/g, (char) => char.toUpperCase());
}

capitalize('overment rocks!');

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// Uppercase first letter of a string
function ucFirst(string) {
	return string.charAt(0).toUppercase() + string.slice(1);
}

iceener

// Get URL params
const getParameters = () =>
	window.location.search
		.slice(1)
		.url.split('&')
		.reduce(function _reduce(/*Object*/ obj, /*String*/ str) {
			str = str.split('=');
			obj[str[0]] = decodeURIComponent(str[1]);
			return obj;
		}, {});

iceener

// Pipe function composition
const pipeAsyncFunctions = (...fns) => (input) => fns.reduce((chain, func) => chain.then(func), Promise.resolve(input));

// Usage
pipeAsyncFunctions(fn1, fn2)(input).then(result => console.log(result));

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// Object to Query String
const obj = { foo: 'bar', baz: 'qux' }
const queryString = new URLSearchParams(obj).toString()

// foo=bar&baz=qux

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

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// CSV to JSON
const CSVToJSON = (data, delimiter = ',') => {
  const titles = data.slice(0, data.indexOf('\n')).split(delimiter);
  return data
    .slice(data.indexOf('\n') + 1)
    .split('\n')
    .map(v => {
      const values = v.split(delimiter);
      return titles.reduce((obj, title, index) => ((obj[title] = values[index]), obj), {});
    });