Question

我正在尝试让节点js脚本将一些坐标写入到csv文件中，以便在Newman CLI脚本中使用。我有以下内容：

const axios = require('axios');
var move_decimal = require('move-decimal-point');
var sLat = 45.029830;
var sLon = -93.400891;
var eLat = 45.069523;
var eLon = -94.286001;
var arrLatLon = []

axios.get('http://router.project-osrm.org/route/v1/driving/' + sLon + ',' + sLat + ';' + eLon + ',' + eLat + '?steps=true')
.then(function (response) {
    for (let i = 0; i < response.data.routes[0].legs.length; i++) {
        //console.log(response.data)
        for (let ii = 0; ii < response.data.routes[0].legs[i].steps.length; ii++) {
            //console.log('leg ' + i + " - step " + ii + ": " + response.data.routes[0].legs[i].steps[ii].maneuver.location[1] + "," + response.data.routes[0].legs[i].steps[ii].maneuver.location[0]);

            // Declaring Latitude as 'n' & Longitude as 'nn' for decimal calculations
            var n = response.data.routes[0].legs[i].steps[ii].maneuver.location[1]
            var nn = response.data.routes[0].legs[i].steps[ii].maneuver.location[0]

            // Latitude calculatiuons to make 'lat' values API friendly
            var y = move_decimal(n, 6)
            var p = Math.trunc(y);

            // Longitude calculations to make 'lon' values API friendly
            var yy = move_decimal(nn, 6)
            var pp = Math.trunc(yy);

            arrLatLon.push(p +  "," + pp);
        }
        console.log(arrLatLon)
    }
})

我一直在浏览并尝试许多有关将数组元素从arrLatLon写入本地计算机上的输出文件的教程/代码片段，但是都没有成功。当前代码正确输出lat，lon，console.log(arrLatLon)输出：

[ '45029830,-93400894',
  '44982812,-93400740',
  '44977444,-93400530',
  '44973116,-93410884',
  '44971101,-93450400',
  '45035514,-93766885',
  '45035610,-93766886',
  '45081631,-94286752',
  '45070849,-94282026' ]

任何帮助将不胜感激。谢谢。

Answer 1

使用nodejs，您可以使用fs模块轻松地写文件

const fs = require('fs');
fs.writeFile("/tmp/test", "Hey there!", function(err) {
    if(err) {
        return console.log(err);
    }

    console.log("The file was saved!");
});

就您而言，您可以简单地做类似的事情

const fs = require('fs');
// I'm converting your array in a string on which every value is
// separated by a new line character
const output = arrLatLon.join("\n");

// write the output at /tmp/test
fs.writeFile("/tmp/test", output, function(err) {
    if(err) {
        return console.log(err);
    }

    console.log("The file was saved!");
});

让我将您转发到这个问题以获取更多信息Writing files in Node.js

将javascript数组元素写入文件

1 个答案: