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This script helps you study by quizzing you some percentage of the times you enter a command in your terminal.
Check out this blog post for details: https://igliu.com/how-to-learn-a-natural-language/
# ...
# Before all your aliases
alias ls="/usr/local/bin/precmd.js; ls"
alias cd="/usr/local/bin/precmd.js; cd"
alias git="/usr/local/bin/precmd.js; git"
# repeat with other non-urgent commands that you use often
# other aliases
# ...
# ...
#! /usr/bin/node
// @author Anthony Liu <igliu@mit.edu>
// @date 2017-01-11
var fs = require('fs');
var readlineSync = require('readline-sync');
// config
var incidence = 0.2; // occurs with this probability
var questionsPerIncident = 5; // this many right answers per incident
var likelyRatio = 8; // easiest word is this much less likely
var dirName = '~~ LOCATION OF YOUR WORDS FILE ~~'; // directory that the data file is in
var fileName = 'words.txt'; //the name of the data file
// parses a file into a list of from->to pairs
function deserialize(fileLoc, callback) {
fs.readFile(fileLoc, 'utf8', function(err, contents) {
if (err) {
return callback(err, false);
}
try {
var data = [];
var lines = contents.split('\n');
lines.forEach(function(line) {
if (line.length > 0) {
var components = line.split(',');
var from = components[0];
var to = components[1];
var correct = components.length == 4 ? components[2] : 0;
var incorrect = components.length == 4 ? components[3] : 0;
correct = parseInt(correct);
incorrect = parseInt(incorrect);
data.push({
'from': from,
'to': to,
'correct': correct,
'incorrect': incorrect
});
}
});
return callback(false, data);
} catch (e) {
console.log(e.message);
return callback(true);
}
});
}
// converts a list of from->to pairs to a string
function serialize(data) {
var str = '';
for (var i = 0; i < data.length; i++) {
var word = data[i];
var line = word.from + ',';
line += word.to + ',';
line += word.correct + ',';
line += word.incorrect;
str += line;
if (i !== data.length - 1) str += '\n';
}
return str;
}
if (Math.random() < incidence) {
// parse the data file
deserialize(dirName + fileName, function(err, data) {
if (err) return console.log('Unknown error.', err);
var answeredCorrectly = 0;
var y0 = 2/(likelyRatio + 1);
var a = 2*y0 - 2;
var b = 2 - y0;
do {
// sort the data
data.sort(function(a, b) {
var aRatio = a.correct/(a.incorrect + 1)
var bRatio = b.correct/(b.incorrect + 1)
return aRatio - bRatio;
});
// select a word, weighted by correct/incorrect ratio
var r = (-b + Math.sqrt(b*b + 2*a*Math.random()))/a;
var idx = Math.floor(r * data.length);
var word = data[idx];
// quiz the user on that word
var pos = answeredCorrectly + 1;
var guess = readlineSync.question(
'(' + pos + '/' + questionsPerIncident + ') ' +
'What does "' + word.from + '" correspond to? '
);
if (guess === word.to) {
answeredCorrectly += 1;
data[idx].correct += 1;
} else {
data[idx].incorrect += 1;
console.log(data[idx]);
}
// save the new data file every round
var str = serialize(data);
fs.writeFileSync(dirName + fileName, str)
} while (answeredCorrectly < questionsPerIncident);
console.log('--- --- ---');
});
}
goodbye,tchau,0,0
yes,sim,0,0
your,seu,0,0
who,quem,0,0
good afternoon,boa tarde,1,0
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