Chapter 6

Here are the solutions to the Exercises, for the Chapter 6, Literals and Destructuring chapter.

	'use strict';

	const greet = function(name, gender) {
	return `Hello, ${gender === Symbol.for('female') ? 'Ms.' : 'Mr.'} ${name}`;
	};

	console.log(greet('Sara', Symbol.for('female'))); //Hello, Ms. Sara
	console.log(greet('Tom', Symbol.for('male'))); //Hello, Mr. Tom

	'use strict';

	const stripMargin = function(texts, ...expressions) {
	const exceptLast = expressions.map(function(expression, index) {
	return `${texts[index]}${expression.toString().toUpperCase()}`;
	}).join('');

	const result = `${exceptLast}${texts[texts.length - 1]}`;

	return result.replace(/[ ][ s]+(w)/g, ' $1').trim();
	};

	const name = 'Jane';

	const processed = stripMargin` This is for
	${name} and it needs to be
	delivered by December 24th.`;


	console.log(processed);
	//This is for JANE and it needs to be delivered by December 24th.

	'use strict';

	const beforeAndAfter = function(number) {
	if(number < 0) return [];
	if(number === 0) return [1];

	return [number - 1, number + 1];
	};

	let before = 0;
	let after = 0;

	//Your code goes before =
	[before, after] = beforeAndAfter(7);
	console.log(`${before} and ${after}`); //6 and 8

	[before, after] = beforeAndAfter(9);
	console.log(`${before} and ${after}`); //8 and 10

	[before, after = 0] = beforeAndAfter(0);
	console.log(`${before} and ${after}`); //0 and 1

	[before = 0, after = 0] = beforeAndAfter(-1);
	console.log(`${before} and ${after}`); //0 and 0

	'use strict';

	const purchaseItems = function(essential1, essential2, ...optionals) {
	console.log(`${essential1}, ${essential2}, ${optionals.join(', ')}`);
	};

	const mustHaves = ['bread', 'milk'];
	const also = ['eggs', 'donuts'];
	const andAlso = ['juice', 'tea'];

	//call purchaseItems so it prints
	//bread, milk, eggs, donuts, coffee, juice, tea
	purchaseItems(...mustHaves, ...[...also, 'coffee', ...andAlso]);

	'use strict';

	const getDetails = function(
	{name, born: { year: birthYear }, graduated: {year}}) {
	return `${name} born in the year ${birthYear}, graduated in ${year}.`;
	};

	const details =
	getDetails({name: 'Sara',
	born: { month: 1, day: 1, year: 2000 },
	graduated: { month: 5, day: 31, year: 2018 }});

	console.log(details);
	//Sara born in the year 2000, graduated in 2018.

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Table of Contents for Chapter 6