[프로그래머스] 같은 숫자는 싫어 js javascript

 

function solution(arr){
    var stack =[]
    
    arr.forEach((a,idx)=>{
       if(stack.length==0)stack.push(a);
       else if(stack[stack.length-1]!==a)stack.push(a)
     }
   )   
    
    
    return stack;
 }

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