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const arr = [3, 1, 4, 1, 5]; arr.push(9); console.log(arr); // [3,1,4,1,5,9] const last = arr.pop(); console.log(last, arr); // 9 [3,1,4,1,5] arr.unshift(0); console.log(arr); // [0,3,1,4,1,5] arr.shift(); console.log(arr); // [3,1,4,1,5] arr.splice(2, 1, 99, 100); console.log(arr); // [3,1,99,100,1,5] const nums = [10, 2, 30, 4]; nums.sort((a, b) => a - b); console.log(nums); // [2,4,10,30] nums.reverse(); console.log(nums); // [30,10,4,2]
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