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How to use the pluck function from underscore

Find comprehensive JavaScript underscore.pluck code examples handpicked from public code repositorys.

underscore.pluck is a function that extracts a list of property values from a collection of objects.

deviceService.js

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 * @param {Array} newArray              List of attributes of the configuration.
 * @return {Array}                      Merge of the attributes of the device and those of the configuration.
 */
function mergeArrays(original, newArray) {
    /* jshint camelcase: false */
    const originalKeys = _.pluck(original, 'object_id');
    const newKeys = _.pluck(newArray, 'object_id');
    const addedKeys = _.difference(newKeys, originalKeys);
    const differenceArray = newArray.filter(function (item) {
        return item.object_id && addedKeys.indexOf(item.object_id) >= 0;

+ 3 other calls in file

repo.js

GitHub: Cloud-V/Backend

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const currentAttributes = JSON.parse(
    vcdEntry.attributes
);
let renderedSignals = currentAttributes.rendered || [];
let hiddentSignals = currentAttributes.hidden || [];
const allSignals = _.pluck(wave.signal, "name");
const newSignals = _.difference(
    allSignals,
    renderedSignals.concat(hiddentSignals)
);

+ 5 other calls in file

How does underscore.pluck work?

underscore.pluck takes two arguments: a collection (usually an array of objects) and a string representing the name of a property.

The function then returns an array of values that correspond to that property in each of the objects in the collection.

For example, if we had an array of objects representing books with properties such as title, author, and yearPublished, we could use underscore.pluck to extract an array of all of the book titles:

javascript
const books = [
  { title: "The Great Gatsby", author: "F. Scott Fitzgerald", yearPublished: 1925 },
  { title: "To Kill a Mockingbird", author: "Harper Lee", yearPublished: 1960 },
  { title: "Pride and Prejudice", author: "Jane Austen", yearPublished: 1813 }
];

const titles = _.pluck(books, 'title');

console.log(titles); // ["The Great Gatsby", "To Kill a Mockingbird", "Pride and Prejudice"]

In this example, we pass the books array as the first argument to _.pluck, and the string 'title' as the second argument. The function then returns an array containing the values of the title property for each book in the array.

leaflet-measure.js

GitHub: susanameono/Clase-9-correcta

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// an index go together.
_.zip = function() {
  var length = _.max(_.pluck(arguments, "length").concat(0));
  var results = new Array(length);
  for (var i = 0; i < length; i++) {
    results[i] = _.pluck(arguments, '' + i);
  }
  return results;
};

+ 3 other calls in file

validator.js

GitHub: nishchaldv/avro-website

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var _validateRecord = function(schema, obj) {
  if (!_.isObject(obj) || _.isArray(obj)) {
    throw new ValidationError('Expected record Javascript type to be non-array object, got ' + JSON.stringify(obj));
  }

  var schemaFieldNames = _.pluck(schema.fields, 'name').sort();
  var objFieldNames = _.keys(obj).sort();
  if (!_.isEqual(schemaFieldNames, objFieldNames)) {
    throw new ValidationError('Expected record fields ' + JSON.stringify(schemaFieldNames) + '; got ' + JSON.stringify(objFieldNames));
  }

Ai Example

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const users = [
  { id: 1, name: "Alice", age: 25 },
  { id: 2, name: "Bob", age: 30 },
  { id: 3, name: "Charlie", age: 35 },
];

const names = _.pluck(users, "name");

console.log(names); // ["Alice", "Bob", "Charlie"]

In this example, we have an array of user objects with properties such as id, name, and age. We use _.pluck to extract the name property from each object, and store the resulting array of names in the names variable. The function then returns an array containing the values of the name property for each user in the array.

classifier.js

GitHub: ArVinD-005/RepoA

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// an index go together.
_.zip = function() {
  var args = slice.call(arguments);
  var length = _.max(_.pluck(args, 'length'));
  var results = new Array(length);
  for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i);
  return results;
};

// If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),

+ 13 other calls in file

customer.js

GitHub: gautam-16/prod

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let questionList = [];
let orgId = params.orgId;
customerService.getCategoryAssesmentDetail(params.categoryId,orgId)
.then(async function(data){
    let assesmentData = await customerService.getAssesmentSurvey(params.categoryId,orgId);
    let questionIds = _.pluck(data,'questionId');
    questionIds = _.uniq(questionIds);
    questionIds.forEach(questionId => {
        let questionData = {};
        let questionsArray = _.reject(data,(questionobj)=>{

+ 24 other calls in file

notification.js

GitHub: gautam-16/prod

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if(authData.isKeyStaff)
{
    let totalCount = await notificationService.getOrgNotificationCount(authData.adminId)
    console.log(totalCount[0].count);

    // let ids = _.pluck(totalCount,'communication_id');
    // console.log(ids);
    // ids = ids.filter(function( element ) {
    //     return element !== undefined;
    //  });

+ 5 other calls in file

jshint.js

GitHub: mediabuff/gecko

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_.zip = function() {
  var args = slice.call(arguments);
  var length = _.max(_.pluck(args, 'length'));
  var results = new Array(length);
  for (var i = 0; i < length; i++) {
    results[i] = _.pluck(args, "" + i);
  }
  return results;
};

+ 5 other calls in file

space_users.service.js

GitHub: 444748104/oa

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    filters: [
        ['_id', 'in', su.organizations]
    ],
    fields: ['company_id']
});
company_ids = _.pluck(orgs, 'company_id');
// company_ids中的空值就空着，不需要转换成根组织ID值
company_ids = _.uniq(_.compact(company_ids));
await suObj.directUpdate(_id, {
    company_ids: company_ids

booking-controller.js

GitHub: AnshulPurohit21/ALJ

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bookingData[i].status = bookingData[i].currentStatus;
bookingData[i].currentStatus = configs.MessageConfiguration.get('/lang', {
  locale: lang,
  message: bookingData[i].currentStatus,
});
service = _.pluck(bookingData[i].services, 'serviceName');
service = service.join();
if (bookingData[i].status == bookingConfiguration.get('/BOOKING_STATUS', {
  STATUS: 'COMPLETED',
})) {

+ 15 other calls in file

admin-controller.js

GitHub: AnshulPurohit21/ALJ

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  customerID: 1,
}, {
  lean: true,
},
'customerID');
customers = _.pluck(customers, 'customerID');
// if(customers.length > 0) {
// customers.map(async (c) => {
// if (c && c.deviceToken && c.deviceType) {
services.Notification.sendPUSHToUser(payloadData.token, payloadData.deviceType, null, messageData, notificationType);

+ 7 other calls in file

C3DataViews.js

GitHub: jskopek/shellviz-homepage

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axis: {
    // shows labels on left when there are more than 10 columns
    rotated: this.data.length > 10,
    x: {
        type: 'category',
        categories: _.pluck(this.data, 0)
    }
},
legend: { show: false },
transition: { duration: 0 }

+ 2 other calls in file

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