➕ More Array Methods
- concat - merge arrays
- includes - look for a value
- indexOf - just like string.indexOf
- reverse - reverses an array
💑 concat() - merge arrays
let cats = ['blue', 'kitty']
let dogs = ['rusty', 'wyatt']
cats.concat(dogs); // ["blue", "kitty", "rusty", "wyatt"]
dogs.concat(cats); // ["rusty", "wyatt", "blue", "kitty"]
cats // ['blue', 'kitty']
dogs // ['rusty', 'wyatt']
let comboParty = dogs.concat(cats);
comboParty // ["rusty", "wyatt", "blue", "kitty"]👻 includes() - look for a value
let cats = ['blue', 'kitty']
cats.includes('blue') // true
cats.includes('Blue') // false🎐 indexOf() - just like string.indexOf
"Blue".indexOf('B') // 0
"Blue".indexOf('e') // 3
"Blue".indexOf('0') // -1
comboParty // ["rusty", "wyatt", "blue", "kitty"]
comboParty.indexOf('rusty') // 0
comboParty.indexOf('kitty') // 3
comboParty.indexOf('ASDQWEZXC') // -1💔 reverse() - reverses an array
comboParty // ["rusty", "wyatt", "blue", "kitty"]
comboParty.reverse(); // ["kitty", "blue", "wyatt", "rusty"]
comboParty // ["kitty", "blue", "wyatt", "rusty"]
comboParty.push("blue"); // ["kitty", "blue", "wyatt", "rusty", "blue"]
comboParty.indexOf('blue') // 1
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