将本地文本文件读入 JavaScript 数组
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/34857458/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Reading local text file into a JavaScript array
提问by William Ross
I have a text file in the same folder as my JavaScript file. Both files are stored on my local machine. The .txt file is one word on each line like:
我在与 JavaScript 文件相同的文件夹中有一个文本文件。这两个文件都存储在我的本地机器上。.txt 文件每行一个字，如：
red
green
blue
black
I want to read in each line and store them in a JavaScript array as efficiently as possible. How do you do this?
我想读取每一行并将它们尽可能高效地存储在 JavaScript 数组中。你怎么做到这一点？
回答by siavolt
Using Node.js
使用 Node.js
sync mode:
同步模式：
var fs = require("fs");
var text = fs.readFileSync("./mytext.txt");
var textByLine = text.split("\n")
async mode:
异步模式：
var fs = require("fs");
fs.readFile("./mytext.txt", function(text){
var textByLine = text.split("\n")
});
UPDATE
更新
As of at least Node 6, readFileSyncreturns a Buffer, so it must first be converted to a string in order for splitto work:
至少从 Node 6 开始，readFileSync返回 a Buffer，因此必须首先将其转换为字符串才能split工作：
var text = fs.readFileSync("./mytext.txt").toString('utf-8');
Or
或者
var text = fs.readFileSync("./mytext.txt", "utf-8");
