node.js - javascript reading data results in an empty object -


i have following code:

var linereader = require('readline').createinterface({     input: require('fs').createreadstream('graph.txt') });  var graph = {};  linereader.on('line', function (line) {     var spl = line.split('\t');     graph[spl[0]] = spl.slice(1); });  console.log(graph);

graph.txt contains data representing graph in adjacency lists such as

1 3 2 3 2 1 3 3 1 2 1

i ran code node script.js. don't understand why @ end graph still empty object. what's correct way read data object?

try replacing console.log(graph); call with:

linereader.on('close', function () {     console.log(graph); });

you see empty object because log happens before file read, reading async.


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