kasperpeulen

#dart:io example

Finding the type of a filesystem object.

Use the FileSystemEntity.type() method to get the type of a file system object. This method is inherited by File, Directory, and Link.

Main library: dart:io
Main element: FileSystemEntity.type
Gist: https://gist.github.com/kasperpeulen/048c53b2e7c779a2573b

kasperpeulen

// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file

// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

library services.analyzer;

import 'package:analyzer/analyzer.dart';
import 'package:analyzer/src/generated/element.dart';
import 'package:analyzer/src/generated/engine.dart' hide Logger;

kasperpeulen

import 'package:analyzer/analyzer.dart';
import 'package:analyzer/src/string_source.dart';
import 'package:analyzer/src/generated/element.dart';
import 'package:analyzer/src/generated/engine.dart';
import 'package:analyzer/src/generated/sdk_io.dart';
import 'package:analyzer/src/generated/source.dart';

main() {
  String doc = dartDoc("main() => print('hello world');", 10);
  print(doc);

kasperpeulen

#dart:io example

Finding the type of a filesystem object

Use the FileSystemEntity.type() method to get the type of a file system object. This method is inherited by File, Directory, and Link.

Main library: dart:io
Main element: FileSystemEntity.type
Gist: https://gist.github.com/kasperpeulen/bf54439b64b66f855a46

kasperpeulen

#dart:io example

Reading a file as a string.

Use the File readAsString() method to read a file as a string.

Main library: dart:io
Main element: File.readAsString
Gist: https://gist.github.com/kasperpeulen/f3f162cef95b94967edd

kasperpeulen

#dart:io example

Creating a file.

Use the File create() method to create a file. To create intermediate directories, set the recursive argument to true (default is false).

Main library: dart:io
Main element: File.create
Gist: https://gist.github.com/kasperpeulen/f06777c610605646c43e

kasperpeulen

#playground example

Main library: playground
Main element:
Gist: https://gist.github.com/kasperpeulen/9ebb68df1645385eafab
DartPad: https://dartpad.dartlang.org/9ebb68df1645385eafab

kasperpeulen

void main() {
  Map map = {
    0: "not null",
    1: null
  };
  bool test(key) => map[key] == null;

  // This will remove all key/value pairs where the value is null.
  map.keys.where(test).toList().forEach(map.remove);

kasperpeulen

void main() {
  Map map = {
    0: "not null",
    1: null
  };
  bool test(key) => map[key] == null;

  // This will remove all key/value pairs where the value is null.
  map.keys.where(test).toList().forEach(map.remove);

kasperpeulen

void main() {
  Map map = {
    0: "not null",
    1: null
  };
  bool test(key) => map[key] == null;

  // This will remove all key/value pairs where the value is null.
  map.keys.where(test).toList().forEach(map.remove);