text-files

How to read plain text file in kotlin?

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1. Using BufferedReader import java.io.File import java.io.BufferedReader fun main(args: Array<String>) { val bufferedReader: BufferedReader = File(“example.txt”).bufferedReader() val inputString = bufferedReader.use { it.readText() } println(inputString) } 2. Using InputStream Read By Line import java.io.File import java.io.InputStream fun main(args: Array<String>) { val inputStream: InputStream = File(“example.txt”).inputStream() val lineList = mutableListOf<String>() inputStream.bufferedReader().forEachLine { lineList.add(it) } lineList.forEach{println(“> ” + … Read more

How to read and write a text file in Flutter

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Setup Add the following plugin in pubspec.yaml: dependencies: path_provider: ^1.6.27 Update the version number to whatever is current. And import it in your code. import ‘package:path_provider/path_provider.dart’; You also have to import dart:io to use the File class. import ‘dart:io’; Writing to a text file _write(String text) async { final Directory directory = await getApplicationDocumentsDirectory(); final … Read more

remove empty lines from text file with PowerShell

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I found a nice one liner here >> http://www.pixelchef.net/remove-empty-lines-file-powershell. Just tested it out with several blanks lines including newlines only as well as lines with just spaces, just tabs, and combinations. (gc file.txt) | ? {$_.trim() -ne “” } | set-content file.txt See the original for some notes about the code. Nice 🙂

Python Multiple users append to the same file at the same time

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You can use file locking: import fcntl new_entry = “foobar” with open(“/somepath/somefile.txt”, “a”) as g: fcntl.flock(g, fcntl.LOCK_EX) g.write(new_entry) fcntl.flock(g, fcntl.LOCK_UN) Note that on some systems, locking is not needed if you’re only writing small buffers, because appends on these systems are atomic.

Copying from one text file to another using Python

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The oneliner: open(“out1.txt”, “w”).writelines([l for l in open(“in.txt”).readlines() if “tests/file/myword” in l]) Recommended with with: with open(“in.txt”) as f: lines = f.readlines() lines = [l for l in lines if “ROW” in l] with open(“out.txt”, “w”) as f1: f1.writelines(lines) Using less memory: with open(“in.txt”) as f: with open(“out.txt”, “w”) as f1: for line in f: … Read more

How to read text file in react

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Simply try the below code and you may understand import React, { Component } from ‘react’; class App extends Component { constructor(props) { super(props); } showFile = async (e) => { e.preventDefault() const reader = new FileReader() reader.onload = async (e) => { const text = (e.target.result) console.log(text) alert(text) }; reader.readAsText(e.target.files[0]) } render = () … Read more

How to read a text file directly from Internet using Java?

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Use an URL instead of File for any access that is not on your local computer. URL url = new URL(“http://www.puzzlers.org/pub/wordlists/pocket.txt”); Scanner s = new Scanner(url.openStream()); Actually, URL is even more generally useful, also for local access (use a file: URL), jar files, and about everything that one can retrieve somehow. The way above interprets … Read more

Easiest way to read text file which is locked by another application

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I think you just want the following: using (var fileStream = new FileStream(“foo.bar”, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) using (var textReader = new StreamReader(fileStream)) { var content = textReader.ReadToEnd(); } The FileAccess.Read parameter is what is important, to indicate that you only want to read the file. Of course, even to do this, the file must have … Read more