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{
"data": {
"question": {
"text": "__1__ is a gas giant in the Solar system. __2__ is its moon.",
"audio": "",
"image": ""
},
"answers": [
[ "Jupiter" ],
[ "Io", "Europa", "Ganymede", "Callisto" ],
[ "Saturn" ],
[ "Mimas", "Enceladus", "Tethys", "Dione", "Rhea", "Titan", "Iapetus" ]
],
"data":{
"expAnswers": [
[ "jupiter" ],
[ "io", "europa", "ganymede", "callisto" ],
[ "saturn" ],
[ "mimas", "enceladus", "tethys", "dione", "rhea", "titan", "iapetus" ]
],
"expAnsIndices": [
[ 0, 1 ], [ 2, 3 ]
]
}
},
"config": {
"eval_unordered": false,
"eval_ignore_case": true,
"eval_ignore_whitespaces": true
}
} |
Evaluation logic
Pseudo Code (Err.. Actual test code!)
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function evaluate(answers) {
// preprocess user answers - remove embedded white spaces, and convert to lower case, based on the config
answers = _.map(answers, function (a) {
var ans = a;
if (qData.config.eval_ignore_whitespaces)
ans = ans.trim().replace(/\s/g, '');
if (qData.config.eval_ignore_case)
ans = ans.toLowerCase();
return ans;
});
// get user answer indices. (this is the index in the expAnswers array in which a match is found,
// -1 if no match found)
var userAnsIndices = _.map(answers, function (answer) {
return _.findIndex(qData.data.data.expAnswers, function (expAns) {
return _.contains(expAns, answer);
});
});
// Sort the userAnsIndices array elements in case if unordered evaluation
if (qData.config.eval_unordered)
userAnsIndices = _.sortBy(userAnsIndices, function (u) { return u });
console.log(userAnsIndices);
// if the userAnsIndices are found in the expAnsIndices, then the question is solvedsovled!
var isSolved = _.some(qData.data.data.expAnsIndices, function (expAns) {
return _.isEqual(expAns, userAnsIndices);
});
var score = isSolved ? userAnsIndices.length : 0;
// compute partial score, if partial scoring is enabled in config
if (!isSolved && qData.config.partial_score) {
var scoreMap = _.map(userAnsIndices, function (u, i) {
return _.some(qData.data.data.expAnsIndices, function (expAns) {
return qData.config.eval_unordered ? _.contains(expAns, u) : (expAns[i] == u);
}) ? 1 : 0;
});
score = _.reduce(scoreMap, function (memo, num) { return memo + num; }, 0);
}
console.log('Solved', isSolved);
console.log('Score', score / userAnsIndices.length);
}
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