数组去重，数组去除空格

数组去重

 function quchong(arr) {
    let myarr = []
    myarr.push(arr[0])
    for (let arritem of arr) {
      if (myarr.indexOf(arritem) == -1) {
        myarr.push(arritem)
      }
    }
    return myarr
  }
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数组去除空格

let newArr=arr.filter(i=>i && i.trim())
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