console
let arr = [1,2,3,4,5,6,6,7,8,9,10,10,10,11,12,12,4,5];
// [1,2,3,4,5,6] [6,6] [6,7,8,9,10] [10,10,10] [10,11,12] [12,12] [12,4,5]
function splitArr(arr){
if(arr.length == 1){
return [arr];
}
if(arr.length == 0){
return [];
}
let temp = []; //临时
let result = []; //返回结果
temp = [arr[0]];
for(let i = 1, len=arr.length; i<len; i++){
if(arr[i] !== arr[i-1]){
temp.push(arr[i])
if(arr[i] == arr[i+1]){
result.push(temp)
temp = [arr[i]]
}
}else{
temp.push(arr[i])
if(arr[i] !== arr[i+1]){
result.push(temp)
temp = [arr[i]]
}
}
if(i == len-1){
result.push(temp)
}
}
return result;
}
document.getElementById('app').append(splitArr(arr))
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Document</title>
</head>
<body>
<div id="app">
</div>
</body>
</html>