JavaScript删除文本文档中每第3行的文本

Posted 2021-05-06

我需要一些帮助来自动执行任务。

Before.txt

01 ABCDE 02 ABCDE 03 ABCDE 04 ABCDE 05 ABCDE 06 ABCDE 07 ABCDE 08 ABCDE 09 ABCDE

After.txt 01 ABCDE 02 ABCDE 03 04 ABCDE 05 ABCDE 06 07 ABCDE 08 ABCDE 09

答案

只需用你的字符串替换words即可。 result是最后一个字符串，其中所有值由一个新行连接在一起。

var words = "01 ABCDE
02 ABCDE
03 ABCDE
04 ABCDE
05 ABCDE
06 ABCDE
07 ABCDE
08 ABCDE
09 ABCDE";

// we split the file into an array using the new lines as the split point
var lines = words.split(/
?
/);

for (var i = 0; i < lines.length; i++) {
  // we take every third line and delete all the chars from 3 and beyond
  if (i > 0 && i % 3 === 0)
    lines[i] = lines[i].substring(0, 2);
}
// we join the values again
result = lines.join('
')