NodeJS code to display the longest acceptable word that can be written on a seven-segment display.

seven-segment-display-longest-word-nodejs.js

var fileSystem = require("fs");

displayLongestAcceptableWord();

function displayLongestAcceptableWord(){
    var longestAcceptableWords = getLongestAcceptableWords();
    longestAcceptableWords.forEach(function(word){
        console.log(word);
    });
}


function getLongestAcceptableWords(){
    var wordList = getWordList();
    var acceptableWordList = getAcceptableWordsFromList(wordList);
    var longestAcceptableWord = getLongestWordsFromList(acceptableWordList);
    return longestAcceptableWord;
}

function getWordList(){
    var fileContent = fileSystem.readFileSync("words.txt", "utf-8");
    return fileContent.split("\n");
}

function getAcceptableWordsFromList(wordList){
    var acceptableWords = [];
    wordList.forEach(function(eachWord){
        addWordToListIfAcceptable(eachWord, acceptableWords);
    });
    return acceptableWords;
}

function addWordToListIfAcceptable(word, wordList){
    if(wordIsAcceptable(word)){
        wordList.push(word);
    }
}

function wordIsAcceptable(word){
    var forbiddenWordPattern = /[gkmqtvwxyz0-9-]/;
    return !word.match(forbiddenWordPattern);
}

function getLongestWordsFromList(wordList){
    var longestWord = [""];

    wordList.forEach(function(word){
        if(word.length > longestWord[0].length){
            longestWord = [word];
        }
        else if(word.length == longestWord[0].length){
            longestWord.push(word);
        }
    });
    return longestWord;
}