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Read huge JSON with Node
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const StreamArray = require('stream-json/streamers/StreamArray'); | |
const fs = require('fs'); | |
let combine = "Working_Vietnamese_English_Combined.json"; | |
let vnedict = `vnedict__vietnamese-english.json` | |
const jsonStream = StreamArray.withParser(); | |
fs.createReadStream(vnedict).pipe(jsonStream.input); | |
const combinedictjson = fs.readFileSync(combine); | |
const combinedictArray = JSON.parse(combinedictjson); | |
let combinedDictionary = [] | |
let indexTracking = 0; | |
jsonStream.on('data', ({ key, value }) => { | |
let wordvndict = value.word.toLowerCase().trim(); | |
let flag = false; | |
for (let i = 0; i < combinedictArray.length; i++) { | |
let combineEachWord = combinedictArray[i].word.toLowerCase().trim(); | |
if (wordvndict === combineEachWord) { | |
flag = true; | |
let eachItem = {} | |
eachItem.word = combineEachWord | |
eachItem.meaning = combinedictArray[i].meaning; | |
eachItem.meaningvnedict = combinedictArray[i].meaningvnedict | |
combinedDictionary.push(eachItem) | |
break; | |
} | |
} | |
if (flag === false) { | |
let eachItem = {} | |
eachItem.word = value.word | |
eachItem.meaning = ""; | |
eachItem.meaningvnedict = value.meaning; | |
combinedDictionary.push(eachItem) | |
} | |
}); | |
jsonStream.on('end', (what) => { | |
console.log(indexTracking) | |
let data = JSON.stringify(combinedDictionary) | |
fs.writeFile('Vietnamese_English_Combined.json', data, (err) => { | |
if (err) throw err; | |
console.log('Data written to file'); | |
}); | |
console.log('All Done'); | |
}); | |
//source: http://www.denisowski.org/Vietnamese/vnedict.txt | |
//https://www.informatik.uni-leipzig.de/~duc/TD/td/index.php?bpos=0&db=ev |
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