从 txt 文件创建变量数组

Question

我有一个 txt 文件，然后我需要运行所有以数字 2 开头的行，然后将它们放入我正在使用 node.js 的数组中，这是迄今为止尝试过的方法。前 3 行始终是静态的，因此它们不会改变，我正在使用 readFileSync 将文件放入变量中。所以我使用 substr 并且已经归因于它们所属的前 3 行，问题是，以数字 2 开头的行对于每个文件都是随机的，一个有 10 个，另外 15 个，然后我不能使用 substr。这是我到目前为止得到的。

import pathFile from './readDir.js'

import { readFileSync } from 'fs'

 

 

const files = pathFile()

 

 

const read = () => {

  let a = []

  for (let i = 0; i < files.length; i++)

    a.push(readFileSync(files[i],'utf-8'))

 

  return a

 

}

 

 

const pedido = read();

 

const header = {

  identifier: pedido[0].substr(1,15),

  distributorCNPJ: pedido[0].substr(16,15).trim(),

  processingDate: pedido[0].substr(31,8),

  processingHour: pedido[0].substr(39,8),

  industryCNPJ: pedido[0].substr(47,15).trim()

 

}

const invoice = {

  customerCNPJ: pedido[0].substr(65,15),

  invoiceNumber: pedido[0].substr(80,12).trim(),

  date: pedido[0].substr(92,8),

  orderType: pedido[0].substr(100,1),

  returnType: pedido[0].substr(101,1),

  comercialPointer: pedido[0].substr(102,5),

  customerInvoiceNumber: pedido[0].substr(107,15).trim(),

  //deadLine: pedido[0].substr(122,3), Nao utiliza

  agentCode: pedido[0].substr(122,4)

}

 

const deadLine = {

  code: pedido[0].substr(129,5),

  description: pedido[0].substr(135,30).trim(),

  numberQuotes: pedido[0].substr(136,3),

  discount: pedido[0].substr(39,8),

  industryCNPJ: pedido[0].substr(47,15).trim()

 

}

console.log(deadLine)

   

Answer 1

查看 split 函数将文本拆分为数组。const { readFileSync } = require('fs')const file = readFileSync('./PEDEMS_01260848000112_20200908124543.txt')const txtFile = file.toString()const allLines = txtFile.split('\n') // Create array with linesconst invoice = allLines.slice(0,3) // Top 3 linesconst cleanLines = allLines.slice(3, allLines.length) // Everything except top 3 lines// Loop through the linescleanLines.forEach(line => {&nbsp; const columns = line.split('&nbsp; &nbsp; ') // Split again on columnns&nbsp; const hasTwo = columns[0].substr(0,1) // Check the first number&nbsp; if (hasTwo) {&nbsp; &nbsp; // It started with 2, you can do something&nbsp; &nbsp; console.log('do some magic')&nbsp; }})