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How to use the concat function from lodash

Find comprehensive JavaScript lodash.concat code examples handpicked from public code repositorys.

lodash.concat is a function that combines multiple arrays into a single array.

packExternalModules.js

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  });
}

// (1) Generate dependency composition
const compositeModules = _.uniq(_.flatMap(stats.stats, compileStats => {
  const externalModules = _.concat(
    getExternalModules.call(this, compileStats),
    _.map(packageForceIncludes, whitelistedPackage => ({ external: whitelistedPackage }))
  );
  return getProdModules.call(this, externalModules, packagePath, dependencyGraph);

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app.js

GitHub: naturalcrit/homebrewery

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				googleBrews.splice(match, 1);
			}
		}

		googleBrews = googleBrews.map((brew)=>({ ...brew, authors: [req.account.username] }));
		brews = _.concat(brews, googleBrews);
	}
}

req.brews = _.map(brews, (brew)=>{

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How does lodash.concat work?

lodash.concat is a function that combines multiple arrays into a single array. When you call lodash.concat(), you pass in two or more arrays as parameters. The function then creates a new array that consists of all the elements of each array, in the order in which they were passed as parameters. To create the new array, lodash.concat() uses the Array.prototype.concat() method, which combines the arrays passed as parameters into a new array. The resulting array contains all the elements of each array, in the order in which they were passed. This function is useful for tasks that require combining multiple arrays into a single array, such as when working with arrays of data that need to be merged together. Overall, lodash.concat provides a simple way to combine multiple arrays into a single array, which can be useful for various array-related tasks in JavaScript.

i18n.cjs

GitHub: plone/volto

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 * @function getMessages
 * @return {Object} Object with messages
 */
function getMessages() {
  return reduce(
    concat(
      {},
      ...map(
        // We ignore the existing customized shadowed components ones, since most
        // probably we won't be overriding them

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lodash-contrib.commonjs.js

GitHub: node4good/lodash-contrib

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module.exports.cloneWith           = _.cloneWith;
module.exports.collate             = _.collate;
module.exports.compact             = _.compact;
module.exports.comparator          = _.comparator;
module.exports.complement          = _.complement;
module.exports.concat              = _.concat;
module.exports.cond                = _.cond;
module.exports.conforms            = _.conforms;
module.exports.conjoin             = _.conjoin;
module.exports.cons                = _.cons;

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+ 92 other calls in file

Ai Example

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const _ = require("lodash");

// Create three arrays of numbers
const numbers1 = [1, 2, 3];
const numbers2 = [4, 5, 6];
const numbers3 = [7, 8, 9];

// Combine the three arrays into a single array
const combinedNumbers = _.concat(numbers1, numbers2, numbers3);

// Log the resulting array to the console
console.log(combinedNumbers);
// Output: [1, 2, 3, 4, 5, 6, 7, 8, 9]

In this example, we use lodash.concat to combine three arrays of numbers into a single array. We create three arrays of numbers using square brackets notation. We then pass each array as a parameter to _.concat(), which returns a new array that consists of all the elements of each array, in the order in which they were passed. The resulting array contains all the numbers from the three original arrays, in the order in which they were passed to _.concat(). We can use this array in various array-related tasks, such as filtering or mapping the combined elements. Overall, lodash.concat provides a simple way to combine multiple arrays into a single array, which can be useful for various array-related tasks in JavaScript.

index.js

GitHub: sluukkonen/iiris

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{
  name: 'concat',
  params: [num1, num10, num100, num1000],
  benchmarks: (array) => ({
    iiris: () => A.concat(array, array),
    lodash: () => _.concat(array, array),
    ramda: () => R.concat(array, array),
    native: () => [...array, ...array],
  }),
},

nativeoverutil.japanese.md?plain=1

GitHub: gngsn/nodebestpractices

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const opts = require('./utils'); //cf. https://github.com/Berkmann18/NativeVsUtils/blob/master/utils.js

const concatSuite = new Suite('concat', opts);
const array = [0, 1, 2];

concatSuite.add('lodash', () => _.concat(array, 3, 4, 5))
  .add('underscore', () => __.concat(array, 3, 4, 5))
  .add('native', () => array.concat(3, 4, 5))
  .run({ 'async': true });
```

liquid.js

GitHub: department-of-veterans-affairs/content-build

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      return entity;
    }
  }
};

liquid.filters.concat = (...args) => _.concat(...args);

liquid.filters.strip = (string = '') => _.trim(string);

liquid.filters.encode = (string = '') => {

lodash.js

GitHub: mdmarufsarker/lodash

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console.log(chunk); // => [['a', 'b'], ['c', 'd']]


const compact = _.compact([0, 1, false, 2, '', 3]);
console.log(compact); // => [1, 2, 3]


const concat = _.concat([1], 2, [3], [[4]]);
console.log(concat); // => [1, 2, 3, [4]]


const difference = _.difference([2, 1], [2, 3]);
console.log(difference); // => [1]

+ 15 other calls in file

bpjson.js

GitHub: hltcoe/concrete-js

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const corpusEntry = {
  char2tok,
  "doc-id": communication.id,
  "entry-id": communication.id,
  "segment-sections": concat(
    unNullifyList(communication.sectionList)
      .filter((section) => normalizeSectionKind(section.kind) != "ignore")
      .flatMap((section) =>
        unNullifyList(section.sentenceList).map((sentence) => ({

wObjectHelper.js

GitHub: Waiviogit/waivio-api

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const getTopTags = (obj, limit = 2) => {
  const tagCategories = _.get(obj, 'tagCategory', []);
  if (_.isEmpty(tagCategories)) return [];
  let tags = [];
  for (const tagCategory of tagCategories) {
    tags = _.concat(tags, tagCategory.items);
  }


  return _
    .chain(tags)

+ 5 other calls in file

timerlist.js

GitHub: marc2016/TimeTracker2020

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$('select.ticketSelect').each((index, element) => {
  var jobForElement = _.find(that.currentJobTimerList(), i => i._id() == $(element).attr("jobid"))

  var completeList = currentActiveTicketList
  if(jobForElement && jobForElement.ticket())
    _.concat(completeList, jobForElement.ticket())

  $(element).selectize(
    {
      options: completeList,

+ 15 other calls in file

validate.js

GitHub: th3rdwave/serverless-rspack

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  );
}

// Move preferred file extensions to the beginning
const sortedFiles = _.uniq(
  _.concat(
    _.sortBy(
      _.filter(files, (file) =>
        _.includes(preferredExtensions, path.extname(file)),
      ),

bill.controller.js

GitHub: nghiapham17-22/be-mt247

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await Service.find({ idHouse: dataList.idHouse }).exec((err, docs) => {
  try {
    const item = docs.filter((value) => {
      return value.name == 'nuoc' || value.name == 'dien';
    });
    const concat = _.concat(item2, item);
    _.assignIn(service, { concat });

    BillService.find({
      idRoom: dataList.idRoom,

+ 19 other calls in file

lodash.js

GitHub: bySxS/ExpressJS-knex-faker

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//     logger.info('аргумент0 ' + arguments[0] + ' аргумент1 ' + arguments[1])
//     const fixed = _.tail(arguments) //tail принимает массив и возвращает все значения кроме первого
//     return function () {
//         logger.info('fixed ' + fixed)
//         logger.info('функция ' + fn)
//         return fn.apply(this, _.concat(fixed, arguments)) //concat обьединяет в массив
//     }
// }


//partial  =================== //принимает функцию и аргументы к ней

index.js

GitHub: ibtPhilipp/cardinalkit_web

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if ((_, hasIn(dictOutput, this.arrayOutput))) {
  let originalArray = _.get(dictOutput, this.arrayOutput);
  _.set(
    dictOutput,
    this.arrayOutput,
    _.concat(originalArray, [this.valueOutput])
  );
} else {
  _.set(dictOutput, this.arrayOutput, [this.valueOutput]);
}

+ 10 other calls in file

index.js

GitHub: CreativeWebLogic-Net/iCWLNet_Central_Administration

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/* Get results and iterate through all pages */
function go(param) {
    getResults(param)
    .then((res) => {
        dataBlob = _.concat(dataBlob, res.list)
        if (res.next) {
            param.NextToken = res.next
            return go(param)
        } else return resolve(dataBlob)

+ 8 other calls in file

test_lodash.js

GitHub: paoqi1997/snippets

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    console.log('TEST$_.concat');


    const l1 = [1, 2, 3, { a: 'aa' }];
    const l2 = [4, 5, 6, { b: 'bb' }];


    const l1_2 = _.concat(l1, l2);
    console.log(l1_2); // [ 1, 2, 3, { a: 'aa' }, 4, 5, 6, { b: 'bb' } ]
}


function test_remove() {

gulpfile.js

GitHub: achinwo/irev-exporter

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    });
    return modelDef;
});

const [migratedFiles, rest] = await knex.migrate.list();
const allFiles = _.concat([], migratedFiles, rest.map(obj => obj.file));
const migrationDir = require('./knexfile').development.migrations.directory;

//console.log('[MIGRATIONS]', allFiles);

lodash.js

GitHub: ThisisNirmalJaiswal/practiceJS

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// let arr = [1,2,3,4,5, 0, false,6, null, undefined, "", 7,8];
// let result = _.compact(arr);
// console.log(result);




// _.concat(array, [values]);
// Creates a new array concatenating array with any additional arrays and/or values.


// let arr = [1];

+ 11 other calls in file

retail.js

GitHub: tanakorncode/sys-test

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mapretcodes = mapretcodes.concat(_.uniq(_.map(pricelist, 'ret_code')))

const trdcodes = _.uniq(maptrdcodes)
const retcodes = _.uniq(mapretcodes)
// // pricelistAll = _.filter(pricelistAll, (item) => maptrdcodes.includes(item.trd_code))
// pricelistAll = _.concat(pricelistAll, contractlist)

// let trdcodes = _.uniq(pricelistAll.map((row) => row.trd_code)) // map trd code
// let retcodes = _.uniq(pricelistAll.map((row) => row.ret_code)) // map ret code

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