Question

128

node.js - how to write an array to file

rated 0 times [ 130] [ 2] / answers: 1 / hits: 164271 / 11 Years ago, fri, july 12, 2013, 12:00:00

I have a sample array as follows

var arr = [ [ 1373628934214, 3 ],

  [ 1373628934218, 3 ],

  [ 1373628934220, 1 ],

  [ 1373628934230, 1 ],

  [ 1373628934234, 0 ],

  [ 1373628934237, -1 ],

  [ 1373628934242, 0 ],

  [ 1373628934246, -1 ],

  [ 1373628934251, 0 ],

  [ 1373628934266, 11 ] ]

I would like to write this array to a file such as I get a file as follows

1373628934214, 3 

1373628934218, 3

1373628934220, 1

......

......

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elvisissacg

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4 Years ago

answered 11 Years ago kylanalis · Accepted Answer

If it's a huuge array and it would take too much memory to serialize it to a string before writing, you can use streams:

var fs = require('fs');



var file = fs.createWriteStream('array.txt');

file.on('error', function(err) { /* error handling */ });

arr.forEach(function(v) { file.write(v.join(', ') + 'n'); });

file.end();