PROGRAMMING

  minte9
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Backsticks

With backsticks we can embed any expression into the string. 
 
/**
 * Backsticks quotes
 * 
 * Embed any expression into the string
 * Span multiple lines
 * Special characters start with a backslash character
 */

let str = 'World';
console.log(`Hello ${str}`); // Hello World

let guestList = `Guests:
    * John
    * Pete
    * Mary
`;
console.log(guestList); // John Pete Mary

console.log('Object\'s properties'); // Object's properties
console.log('One backslash \\'); // One backslash \

Substring

Modern Javascript has methods like include, startsWith. 
 
/**
 * Substring methods
 * 
 * includes, startsWith, slice
 */

console.log("Widget with id".includes('id')); // true
console.log('Widget'.includes('id', 2)); // false
console.log('Widget'.startsWith('Wid')); // true
console.log('Widget'.endsWith('get')); // true

console.log('Widget'.slice(0, 3)); // Wid
console.log('Widget'.charAt('0')); // W
console.log('Widget'.indexOf('id')); // 1

console.log('Widget with id'.indexOf('Widget')); // 0
console.log('Widget with id'.indexOf('widget')); // -1
console.log('Widget with id'.indexOf("id")); // 1
console.log('Widget with id'.indexOf('id', 2)); // 12

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Last update: 48 days ago
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Types, Arrays