大家好,节日快乐!
我正在尝试使用高地的 csv 行流。为了进行一些特殊处理并避免将标头传递给流,我正在调用.consume()
,然后我希望将结果放在一个数组中。.toArray()
问题是从未调用过的回调。我只是对此感到好奇,因为我已经将解决方案更改为,.map().toArray()
但我仍然认为.consume()
这将是一个更优雅的解决方案。;) 这是从 csv 文件读取并处理行的代码:
const fs = require('fs');
const _ = require('highland');
const dataStream = fs.createReadStream('file.csv', 'utf8');
_(dataStream)
.split()
.consume((err, row, push, next) => {
console.log('consuming a row', row); // <-- this shows data
if (err) {
push(err);
return next();
}
// This condition is needed as .consume() passes an extra {} at the end of the stream <-- donno what this happens!!
if (typeof row !== 'string') {
return next();
}
const cells = row.split(',');
if (cells[0] === 'CODE') { // <-- header row
const { columnNames, columnIndexes } = processHeader(cells)); // <-- not relevant, works okay
return next();
}
console.log('processin content here', processRow(cells)); // <-- not relevant, works okay
push(null, processRow(cells));
return next();
})
.toArray(rows => console.log('ROWS: ', rows)); // <-- I don't get anything here
非常感谢!