var text = "1    2    3    4\n2    3    33"
function checkText(text) {
    text = text.split("\n") //按行分割成數(shù)組
    
    let oLen = 0
    for (let k = 0; k < text.length; k ++) {
       let item = text[k].split("\t") //按tab分割成數(shù)組
       let nLen = item.length //每行列數(shù)量
       if (!oLen) {
          oLen = nLen
       } else {
          if (oLen !== nLen) {
             console.log('有列不相等')
             return false
          }
          oLen = nLen
       }
    }
    console.log('全部相等')
}
checkText(text)