使用node.js覆盖文件中的一行

首先，您需要搜索行的起点和终点。接下来，您需要使用一个函数来替换该行。我使用我的一个库来解决第一部分的问题：Node-
BufferedReader
。

var lineToReplace = "your_line_to_replace";var startLineOffset = 0;var endLineOffset = 0;new BufferedReader ("your_file", { encoding: "utf8" })    .on ("error", function (error){        console.log (error);    })    .on ("line", function (line, byteOffset){        startLineOffset = endLineOffset;        endLineOffset = byteOffset - 1; //byteOffset is the offset of the NEXT byte. -1 if it's the end of the file, if that's the case, endLineOffset = <the file size>        if (line === lineToReplace ){ console.log ("start: " + startLineOffset + ", end: " + endLineOffset +         ", length: " + (endLineOffset - startLineOffset)); this.interrupt (); //interrupts the reading and finishes        }    })    .read ();