Question

我只想将此文本文件分割成行并对行进行分类。如果该行以“数量”开头，则下一行是订单商品，直到该行以“GST”开头。

如果该行以“总金额”开头，则这是总金额行。

Business me . ' l
Address "rwqagePnnter Pro DemcRaﬁﬁlp
Address "mfgr Eva|uat|on Only
Contact line 1
Transaction Number 10006
Issue Date 27/02/201
Time 10:36:55
Salesperson orsa orsa
Qty Description Unit Price Total
1 test $120.00 $120.00
GST $10.91
Total Amount $120.00
Cash $120.00
Please contact us for more information about
this receipt.
Thank you for your business.
d
.
test

请告诉我如何处理PegJS http://pegjs.majda.cz/

Answer 1

这是一个快速而肮脏的样本解决方案

{
  var in_quantity = false // Track whether or not we are in a quantity block
  var quantity    = []
  var gst         = null
  var total       = null
}

start =
  // look for a quantity, then GST, then a total and finally anything else
  (quantity / gst / total / line)+
  {
    return {quantity: quantity, gst: gst, total: total}
  }

chr = [^\n]
eol = "\n"?

quantity   = "Qty" chr+ eol        { in_quantity = true; }
gst        = "GST" g:chr+ eol      { in_quantity = false; gst = g.join('').trim(); }
total      = "Total Amount" t:line { in_quantity = false; total = t.trim(); }

line =
  a:chr+ eol
  {
    if( in_quantity ){
      // break quantities into columns based on tabs
      quantity.push( a.join('').split(/[\t]/) );
    }
    return a.join('');
  }

Answer 2

以下代码如何作为另一种解决方案。

{
  var result = [];
}

start
  = (!QTY AnyLine /
      set:(Quantities TotalAmount)
        {result.push({orders:set[0], total:set[1]})}
    )+ (Chr+)?
  {return result;}

QTY = "Qty"
GST = "GST"

Quantities
  = QtyLine order:(OrderLine*) GSTLine {return order;}

QtyLine
  = QTY Chr* _

OrderLine
  = !GST ch:(Chr+) _ {return ch.join('');}

GSTLine
  = GST Chr* _

TotalAmount
  = "Total Amount" total:(Chr*) _ {return total.join('');}

AnyLine
  = ch:(Chr*) _ {return ch.join('');}

Chr
  = [^\n]
_
  = "\n"

Answer 3

您可以使用XML，或者您可以使用“/”结束每一行，然后使用拆分函数将它们拆分。

mytext = mytext.split("/");

然后使用它。我不知道为什么你不会只使用sql或类似的东西。

如何为此文本文件编写简单的pegjs语法？

3 个答案: