How to use the reduce function from underscore

functions.js

GitHub: pocketnetteam/pocketnet.gui

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//ar = _.shuffle(ar)


ar = _.sortBy(ar, (r) => {return - Number(r.probability || 0) })

var total = _.reduce(ar, function(sum, r){ 
    return sum + Number(r.probability || 0) 
}, 0)

if (total <= 0) return ar[f.rand(0, ar.length - 1)]

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+ 2 other calls in file

game.js

GitHub: Ashteki/ashteki

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    const foundDie = allDice.find((die) => die.uuid === dieId);
    return foundDie;
}

getAllDice() {
    const dieUpgrades = _.reduce(
        this.cardsInPlay,
        (dice, card) => {
            return dice.concat(card.dieUpgrades);
        },

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+ 3 other calls in file

user.js

GitHub: Cloud-V/Backend

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query.deleted = false;
query.authComplete = true;
query.type = UserType.Regular;
return new Promise(async (resolve, reject) => {
    const userPaths = _.pickSchema(userModel);
    const projection = _.reduce(
        userPaths,
        (accum, val) => {
            if (!/\./.test(val)) {
                accum[val] = 1;

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classifier.js

GitHub: ArVinD-005/RepoA

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  return _.filter(array, function(value){ return !!value; });
};

// Return a completely flattened version of an array.
_.flatten = function(array, shallow) {
  return _.reduce(array, function(memo, value) {
    if (_.isArray(value)) return memo.concat(shallow ? value : _.flatten(value));
    memo[memo.length] = value;
    return memo;
  }, []);

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+ 20 other calls in file

fix-locale-date-string.js

GitHub: chiefsmurph/robinhood-playground

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} else {
    paths = path.split(/[\.\[]/);
    nPath = _.first(paths);
}

remainingPath = _.reduce(_.rest(paths), function(result, item) {
    if (!_.isEmpty(item)) {
        if (item.match(/^\d\]/)) {
            item = "[" + item;
    }

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+ 5 other calls in file