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IO utilities for SciDart
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README.md

SciDart IO

SciDart IO is file manipulation library compatible with SciDart. This library is part of SciDart project.

Goals

A data manipulation library compatible with SciDart. The focus platform is PC for while to simplify the development.

Motivation

Make easy save and retrieve data from SciDart.

PUB link

Link to the Pub repository: https://pub.dev/packages/scidart_io

Installation

You can follow instruction in the Pub web site: https://pub.dev/packages/scidart_io#-installing-tab-

SciDart IO structure

  • IO: File manipulation libraries;
    • csv: CSV file manipulation;
    • txt: text file manipulation;

Examples

CSV

import 'package:scidart/numdart.dart';
import 'package:scidart_io/scidart_io.dart';

void main() async {
  // read stock_data.csv file in the same directory of the current
  // script
  // the delimiter of this file is ',' but can be any character
  // the reader skip one line in the header of the file and
  // one line at the end of the file
  var data = await readCSV('stock_data.csv', delimiter: ',', skipHeader: 1, skipFooter: 1);
  
  print(data); // show the data
  
  // generate a 2d array data for test
  var data2 = Array2d([
    Array([1, 2, 3, 4, 5]),
    Array([2, 3, 4, 5, 6]),
    Array([3, 4, 5, 6, 7]),
    Array([4, 5, 6, 7, 8]),
    Array([5, 6, 7, 8, 9]),
  ]);
  
  // define a file name
  var fileName = 'data_array.csv';
  
  // save the data in a CSV file
  await writeLinesCSV(data2, fileName);
  
  // read the same data again and convert to Array2d again
  var data2Read = await readCSV(fileName, convertToArray2d: true);
  
  // show the data
  print(data2Read);
}

TXT

import 'package:scidart/numdart.dart';
import 'package:scidart_io/scidart_io.dart';

void main() async {
  // define a data for tests
  var data = Array2d([
    Array([1, 2, 3, 4, 5]),
    Array([2, 3, 4, 5, 6]),
    Array([3, 4, 5, 6, 7]),
    Array([4, 5, 6, 7, 8]),
    Array([5, 6, 7, 8, 9]),
  ]);
  
  // define a file name
  var fileName = 'data_array.txt';
  
  // write lines in the txt files
  await writeLinesTxt(data.toString().split('\n'), fileName);
  
  // read the line again
  var dataRead = await readLinesTxt(fileName);
  
  // show in the terminal
  print(dataRead);
  
  // to write plain string in a file, just use writeTxt
  
  // write string in the txt files
  await writeTxt(data.toString(), fileName);
    
  // read a string again
  dataRead = await readTxt(fileName);
  
  print(dateRead);
}

Todo list

Benchmarks

  • made benchmark on Linux
  • made benchmark on MacOS
  • made benchmark on MS Windows

Code implementations

  • write, read txt (work only in PC)
  • write, read csv (work only in PC)
  • write, read json (work only in PC)
  • write, read mongo (work only in PC)
  • write, read sql like databases (work only in PC)
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