📅  最后修改于: 2022-03-11 15:02:02.146000             🧑  作者: Mango
var file1 = appRoot + '\\csvFiles\\details1.csv';
var file2 = appRoot + '\\csvFiles\\idetails2.csv';
var stream = fs.createReadStream(file1);
var stream2 = fs.createReadStream(file2);
var fileData1 = [],
fileData2 = [],
i = 0;
csv.fromStream(stream).on("data", function(data) {
fileData1.push(data);
}).on("end", function() {
csv.fromStream(stream2).on("data", function(data) {
if (i != 0) {
fileData2.push(data);
}
i++;
}).on("end", function() {
console.log("done");
var fileData3 = fileData1.concat(fileData2);
csv.writeToPath("outputfile.csv", fileData3).on("finish", function() {
res.send('Done merge');
});
});
});