Clarinet - Streaming JSON Parser

#browser

#json

#sax

#javascript

#nodejs

clarinet is a sax-like streaming parser for JSON for nodejs and the browser.

https://github.com/dscape/clarinet

this is how you write npm-top using it:

// all npm authors sorted by number of repos
var fs = require('fs')
 , clarinet = require('../clarinet')
 , parse_stream = clarinet.createStream()
 , author = false
 , authors = {}
 ;


parse_stream.on('openobject', function(name) {
 if(name==='author') author=true;
});

parse_stream.on('key', function(name) {
 if(name==='author') author=true;
});

parse_stream.on('end', function () {
 var sorted = []
 , i
 ;
 for (var a in authors)
 sorted.push([a, authors[a]]);
 sorted.sort(function(a, b) { return a[1] - b[1]; });
 i = sorted.length-1;
 while(i!==-1) {
 console.log(sorted.length-i, sorted[i]);
 i--;
 }
});

parse_stream.on('value', function(value) {
 if(author) { 
 var current_count = authors[value];
 if (current_count) authors[value] +=1;
 else authors[value] = 1;
 author=false; 
 }
});

fs.createReadStream(__dirname + '/npm.json').pipe(parse_stream);