lod-rankclus-find-max.js

'use strict';

const fs = require('fs');

const SEARCH_CLASS = 'http://yago-knowledge.org/resource/wikicat_Towns_in_Baden-Württemberg';
const FILE = './KPClasses-Yago2-22.txt';
let weights = [];

function func(line) {
    if (line.indexOf(SEARCH_CLASS) === 0) {
        weights.push(parseFloat(line.substr(SEARCH_CLASS.length).replace(',', '.')));
    }
}

function end() {
    let max = 0;
    let index = -1;

    for (let i = 0; i < weights.length; i++) {
        if (weights[i] > max) {
            max = weights[i];
            index = i + 1;
        }
    }

    console.log('Total # found:', weights.length);
    console.log('Max:', max);
    console.log('Cluster:', index);
}

let input = fs.createReadStream(FILE);
readLines(input, func, end);

function readLines(input, func, end) {
    let remaining = '';

    input.on('data', data => {
        remaining += data;
        let index = remaining.indexOf('\n');
        let last = 0;
        while (index > -1) {
            let line = remaining.substring(last, index);
            last = index + 1;
            func(line);
            index = remaining.indexOf('\n', last);
        }

        remaining = remaining.substring(last);
    });

    input.on('end', end);
}