added 5 important buil in functions .. #1

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	// catchAwait.js
	const catchAwait = promise =>
	promise
	.then(data => ({ data, error: null }))
	.catch(error => ({ error, data: null }));

	module.exports = catchAwait;

	// working file
	const { getItems } = require('./api/items');
	const catchAwait = require('./utils/catchAwait');

	const allItems = async () => {
	const { error, data } = await catchAwait(getItems());
	if (!error) {
	// code
	}
	console.error(error);
	};

	allItems();

	/**
	* Another way
	*/

	// catchAsync.js
	module.exports = fn => {
	return (req, res, next) => {
	fn(req, res, next).catch(next);
	};
	};

	// createOne.js

	exports.createOne = Model =>
	catchAsync(async (req, res, next) => {
	const doc = await Model.create(req.body);

	res.status(201).json({
	status: 'success',
	data: {
	data: doc,
	},
	});
	});
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71 changes: 70 additions & 1 deletion README.md

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		@@ -1,2 +1,71 @@
		# JavaScript
	The of this repo is to save my js programs. Basics of JavaScript. Beginner level.
	JavaScript, often abbreviated as JS, is a programming language that conforms to the ECMAScript specification. JavaScript is high-level, often just-in-time compiled, and multi-paradigm. It has curly-bracket syntax, dynamic typing, prototype-based object-orientation, and first-class functions. The of this repo is to save my js programs. Basics of JavaScript. Beginner level.

	## Table of Contents

	1. [Important Methods](#methods)

	## Methods
	> Most important javascript build in methods

	<a name="typeof"></a><a name="1.1"></a>
	- [1.1](#typeof) typeof: Returns the type.

	```javascript
	console.log(typeof 44); // number

	console.log(typeof 'something'); // string

	console.log(typeof true); // boolean

	let num = 12;
	console.log(typeof(num)); // number

	```

	<a name="toString"></a><a name="1.2"></a>
	- [1.2](#toString) toString: Returns the string representation of the number's value.

	```javascript
	let num = 10;
	let n = num.toString();

	console.log(typeof(num)); // number

	console.log(typeof(n)); // string
	```

	<a name="indexOf"></a><a name="1.3"></a>
	- [1.3](#indexOf) indexOf: Returns the first index at which a given element can be found in the array, or -1 if it is not present.

	```javascript
	let str = "Hello world, welcome to the JS Universe.";
	console.log(str.indexOf("welcome")); // 13
	console.log(str.indexOf("wall")); // -1

	const fruits = ['Orange', 'Pineapple', 'Apple', 'Melon'];
	console.log(fruits.indexOf('Melon')); // 3

	console.log(fruits.indexOf('klkljkh')); // -1
	```

	<a name="lastIndexOf"></a><a name="1.4"></a>
	- [1.4](#lastIndexOf) lastIndexOf: Returns the last index at which a given element can be found in the array, or -1 if it is not present.

	```javascript
	const fruits = ['Orange', 'Pineapple', 'Apple', 'Melon'];
	console.log(fruits.lastIndexOf('Melon')); // 3

	console.log(fruits.lastIndexOf('klkljkh')); // -1
	```

	<a name="length"></a><a name="1.5"></a>
	- [1.5](#length) length: Returns the number of characters or size in a string or array.

	```javascript
	const fruits = ['Orange', 'Pineapple', 'Apple', 'Melon'];
	console.log(fruits.length); // 4

	let str = "Hello world, welcome to the JS Universe.";
	console.log(str.length); // 40
	```

99 changes: 99 additions & 0 deletions js-coding-technique/loops.js

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	const mil = 1000000;
	const arr = Array(mil);

	console.time('⏲️');

	for (let i = 0; i < mil; i++) {} // 1.6ms

	for (const v of arr) {
	} // 11.7ms

	arr.forEach(v => v); // 2.1ms

	for (let i = mil; i > 0; i--) {} // 1.5ms

	console.timeEnd('⏲️');

	const equine = { unicorn: '🦄', horse: '🐴', zebra: '🦓' };

	for (const key in equine) {
	// Filters out properties inherited from prototype
	if (equine.hasOwnProperty(key)) {
	console.log(equine[key]);
	}
	}

	// Unwrap the the Values

	for (const val of Object.values(equine)) {
	console.log(val);
	}

	// Create a Map
	const equine = new Map(Object.entries(equine));

	for (const v of equine.values()) {
	console.log(v);
	}

	const equine = [
	['unicorn', '🦄'],
	['horse', '🐴'],
	['zebra', '🦓'],
	];

	// 😒 Meh Code
	for (const arr of equine) {
	const type = arr[0];
	const face = arr[1];
	console.log(`${type} looks like ${face}`);
	}

	// 🤯 Destructured Code
	for (const [type, face] of equine) {
	console.log(`${type} looks like ${face}`);
	}

	///////////////
	arr[Symbol.iterator] = function () {
	let i = 0;
	let arr = this;
	return {
	next: function () {
	if (i >= arr.length) {
	return { done: true };
	} else {
	const value = arr[i] + '🙉';
	i++;
	return { value, done: false };
	}
	},
	};
	};

	////////////////////////////////

	const faces = ['😀', '😍', '🤤', '🤯', '💩', '🤠', '🥳'];

	// Transform values
	const withIndex = faces.map((v, i) => `face ${i} is ${v}`);

	// Test at least one value meets a condition
	const isPoopy = faces.some(v => v === '💩');
	// false

	// Test all values meet a condition
	const isEmoji = faces.every(v => v > 'ÿ');
	// true

	// Filter out values
	const withoutPoo = faces.filter(v => v !== '💩');

	// Reduce values to a single value
	const pooCount = faces.reduce((acc, cur) => {
	return acc + (cur === '💩' ? 1 : 0);
	}, 0);
	console.log(pooCount);

	// Sort the values
	const sorted = faces.sort((a, b) => a < b);

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