cutwords

task.js

var fs = require('fs')

var trie = {}
var tempWords = {};

fs.readFile('./text.txt',function(err,callback){
    var str = callback.toString();
    str = str.replace(/[^\u4e00-\u9fa5]/g,'@');
    str = str.replace(/@+/g,' ')
    split(str);
})

function split(str){
    str = str.split(' ');
    for(var i = 0;i<str.length;i++){
        var words = str[i];
        if(words.length<=1){
            continue;
        }

        //var wordsArr = [];
        if(words.length===2){
            //wordsArr.push(words);
            wordsToTire(words);
        }else{
            for(var j=0;j<words.length-2;j++){
                wordsToTire(words.substr(j,4));
                //wordsArr.push(words.substr(j,4))
            }
        }
    }
    trieToWords();
    wordsToArrAndRank()
}

function wordsToTire(str){
    var words = str.split('');

    var stopWords = ["和","与","你","我","两","这","把","那","个","他","您","它","们","是","的","一","了","在"]
    if(stopWords.indexOf(words[0])!==-1){
        return false;
    }
    var temp = trie;
    
    for(var i =0;i<words.length;i++){
        temp = saveToTire(temp,words[i]);
    }

}

function saveToTire(obj,chart){
    obj[chart]=obj[chart]||{len:0}
    obj[chart].len+=1;
    return obj[chart];
}

function trieToWords(){
    var words=[];
    conmbin(trie,'');

}

function wordsToArrAndRank(){
    var wordsArr=[];
    var keys = [];
    for(var i in tempWords){
        keys.push(i);
    }
    keys = '|'+keys.join('|')+'|'
    for(var i in tempWords){
        if(!RegExp('[^|]+'+ i + '\\|').test(keys) && !RegExp('\\|+'+ i + '[^|]+').test(keys) ){
            wordsArr.push([i,tempWords[i]])
        }
    }
    wordsArr.sort(function(a,b){
        return a[1]-b[1]
    })
    // console.log(JSON.stringify(wordsArr))
    console.log('The Key list is',wordsArr)
}

function conmbin(obj,str){
    var retObj = [];
    var haveSone =false;
    var pow = obj.len;
    for(i in obj){
        if(obj[i].len<=6){
            continue;
        }
        if(i!=='len'){
            //console.log(str+i);
            conmbin(obj[i],str+i);
        }
    }

    if(!haveSone && str.length>=2){
        tempWords[str] = tempWords[str] || 0
        tempWords[str] = Math.max(tempWords[str],pow)
    }
}

学习了。