Все методы работы с массивами Javascript, которые вам нужно знать!
[🟣🟡🟣🟡].map(🟣,🟥) => 🟥🟥🟥🟥
[🟡🟣🟥🟡].filter(🟡) => 🟡🟡🟡
[🟥🟥🟡🟡].find(🟡) => 🟡
[🟥🟥🟥🟣].findIndex(🟣) => 3
[🟡🟡🟡🟡].fill(1,🟥) => 🟡🟥🟥🟥
[🟥🟡🟡🟥].some(🟡) => True
[🟣🟡🟡🟥].every(🟣) => False
[🟡🟣🟣🟣].reduce((🟣,🟠)=>🟣+🟠, 0) => 🟡🟡🟡🟡
[🟣🟣🟡🟡].includes(🟣) => True
[🟡🟡🟥🟣].indexOf(🟥) => 2
[🟡🟥🟥🟡].lastIndexOf(🟥) => 2
[🟥🟡🟡🟥].sort() => 🟡🟡🟥🟥
[🟣🟣🟡🟥].reverse() => 🟥🟡🟣🟣
[🟣, 🟡].concat([🟠, 🟠]) => 🟣🟡🟠🟠
[🟡🟡🟡🟡].slice(1,3) => 🟡🟡
[🟣🟣🟡🟡].splice(1,2,🟥🟥) => 🟣🟥🟥🟡
[🟡🟡🟣🟡].join(' - ') => 🟡 - 🟡 - 🟣 - 🟡
[🟡🟡🟣🟣].pop() => 🟣 [🟡🟡🟣]
[🟣🟡🟣🟡].shift() => 🟣 [🟡🟣🟡]
[🟡🟡🟣].push(🟥) => 🟡🟡🟣🟥
[🟣🟡🟡].unshift(🟥) => 🟥🟣🟡🟡
[🟣🟡🟣🟥].copyWithin(2, 0, 2) => 🟣🟡🟣🟡
[🟣🟣🟥🟥].fill(🟩, 2) => 🟣🟣🟩🟩
[🟣, 🟥, 🟩].concat([🟡, 🟡]) => 🟣🟥🟩🟡🟡
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