Hello I have external txt file with data to my function. How can I store read line to variable
const fs = require("fs");
const readline = require("readline");
const firstVariable; [it is firstLine]
const secondVariable; [it is secondLine]
const thirdVariable; [it is thirdLine]
const fourthVariable; [it is fourthLine]
const readInterface = readline.createInterface({
input: fs.createReadStream("./slo1.in"),
output: process.stdout,
terminal: false,
});
readInterface.on("line", function (line) {
console.log(line);
});
Here is a better solution:
const fs = require("fs");
const readline = require("readline");
const readFile = () => {
return new Promise((resolve, reject) => {
const lineArray = [];
const readInterface = readline.createInterface({
input: fs.createReadStream("./slo1.in"),
output: process.stdout,
terminal: false,
});
readInterface.on("line", (line) => {
lineArray.push(line);
}).on("close", () => {
resolve(lineArray);
});
})
}
readFile().then(res => {
console.log(JSON.stringify(res))
})
// or you can use async/await syntax
async function readAsync() {
const res = await readFile();
console.log(res)
}
readAsync();