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How to use the find function from lodash

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

Lodash.find is a function that iterates over an array or object and returns the first element that satisfies a given condition.

index.js

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let routersData = objectql.loadRouters(packagePath);
let oldRoutersInfo = await this.broker.call(`@steedos/service-packages.getPackageRoutersInfo`, {packageName: name})
let routersInfo = _.flattenDeep(_.map(routersData, 'infoList'));
if(oldRoutersInfo){
    _.each(oldRoutersInfo.metadata, (info)=>{
        const _info = _.find(routersInfo, (item)=>{
            return item.path == info.path && JSON.stringify(item.methods) == JSON.stringify(info.methods) && item.md5 == info.md5
        })
        if(!_info){
            core.removeRouter(info.path, info.methods)

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i18n.cjs

GitHub: plone/volto

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    fs.writeFileSync(
      filename,
      `${formatHeader(po.comments, po.headers)}
${map(pot.items, (item) => {
  const poItem = find(po.items, { msgid: item.msgid });
  return [
    `${map(item.references, (ref) => `#: ${ref}`).join('\n')}`,
    `# ${item.comments[0]}`,
    `msgid "${item.msgid}"`,

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How does lodash.find work?

lodash.find works by taking two inputs: an array or object to search and a predicate function that defines the condition to be satisfied.

The function iterates over the elements of the array or the values of the object, applying the predicate function to each element or value in turn.

The predicate function takes a single argument, which is the current element or value being iterated over, and returns a Boolean value indicating whether the element satisfies the condition.

When the function encounters an element or value that satisfies the condition, it immediately returns that element or value as the result.

If no element or value satisfies the condition, the function returns undefined.

Optionally, the function can take a third argument, which is a starting index or key for the search. If provided, the function begins the search at that index or key instead of at the beginning of the array or object.

agenda.spec.js

GitHub: ietf-tools/datatracker

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const searchInputLocator = page.locator('.agenda-search input[type=text]')

await page.locator('.agenda-table > .agenda-table-search > button').click()
await expect(page.locator('.agenda-search')).toBeVisible()

const event = _.find(meetingData.schedule, s => s.type === 'regular')
const eventWithNote = _.find(meetingData.schedule, s => s.note)

// Search different terms
const searchTerms = [

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+ 15 other calls in file

users.js

GitHub: medic/cht-core

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  }


  return Object.assign(error, { details: key });
};


const getDoc = (id, docs) =>  _.find(docs, { _id: id });


const getDocID = doc => {
  if (_.isString(doc)) {
    return doc;

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+ 8 other calls in file

Ai Example

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const _ = require("lodash");

// An array of objects
const people = [
  { name: "Alice", age: 30 },
  { name: "Bob", age: 25 },
  { name: "John", age: 40 },
  { name: "Kate", age: 35 },
];

// Find the first object with a 'name' property equal to 'John'
const john = _.find(people, { name: "John" });

console.log(john); // { name: 'John', age: 40 }

In this example, we first define an array of objects representing people. We then use the lodash.find function to search the array for the first object that has a name property equal to 'John'. We pass the people array as the first argument to lodash.find, and an object { name: 'John' } as the second argument. This object is the predicate function that defines the condition to be satisfied - in this case, that the name property of the current object must be equal to 'John'. When lodash.find encounters the object with a name property of 'John', it immediately returns that object as the result. The resulting object { name: 'John', age: 40 } is then printed to the console.

accept_patient_reports.js

GitHub: medic/cht-core

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  }
};


const getConfig = function(form) {
  const fullConfig = config.get('patient_reports') || [];
  return _.find(fullConfig, { form: form });
};


const _silenceReminders = (registration, report, config) => {
  const toClear = module.exports._findToClear(

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+ 2 other calls in file

index.js

GitHub: DefiLlama/yield-server

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  }
  
  poolInfos.push(pool)
}

const magpieWomPool = _.find(poolInfos, (item) => {
  return item.type === "MAGPIE_WOM_POOL"
})
if (magpieWomPool && magpieWomPool.aprInfo) {
  for(let i = 0, l = wombatRewardTokens.length; i < l; i++) {

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index.js

GitHub: rudderlabs/rudder-transformer

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// get the value from the message given a key
// it'll look for properties, traits and context.traits in the order
const getValueFromPropertiesOrTraits = ({ message, key }) => {
  const keySet = ['properties', 'traits', 'context.traits'];


  const val = _.find(
    _.map(keySet, (k) => get(message, `${k}.${key}`)),
    (v) => !_.isNil(v),
  );
  return !_.isNil(val) ? val : null;

+ 5 other calls in file

reference.js

GitHub: akeneo/pim-api-docs

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response[status] = true;
response.id = operationId + '_' + code;

if (response.hasOwnProperty('x-examples-per-version')) {
    const sortedExamples = _.reverse(_.sortBy(response['x-examples-per-version'], ['x-version']));
    const closestExample = _.find(sortedExamples, function(exemplePerVersion) {
        return exemplePerVersion['x-version'] <= version;
    });
    if (closestExample === undefined) {
        console.log('Error: Missing example for version "' + version + '" of route "' + verb + ' ' + pathUri + '"');

+ 7 other calls in file

lab.js

GitHub: EpistasisLab/Aliro

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    });
};

var saveGFSFile = function(fileObj) {
    // Check if file needs to be replaced
    var oldFile = _.find(experiment.files, {
        filename: fileObj.originalname
    });
    if (oldFile) {
        // Delete old file

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+ 4 other calls in file

manager.js

GitHub: pocketnetteam/pocketnet.gui

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var notinitednodes = _.filter(self.nodes, function(node){
    return !node.inited
})

var node = _.find(notinitednodes, function(node){
    return node.key == nodekey
})

if(!node){

+ 37 other calls in file

zip.js

GitHub: SchneeHertz/exhentai-manga-manager

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let solveBookTypeZip = async (filepath, TEMP_PATH, COVER_PATH)=>{
  let tempFolder = path.join(TEMP_PATH, nanoid())
  let zip = new AdmZip(filepath)
  let zipFileList = zip.getEntries()
  let findZFile = (entryName)=>{
    return _.find(zipFileList, zFile=>zFile.entryName == entryName)
  }
  let fileList = zipFileList.map(zFile=>zFile.entryName)
  let imageList = _.filter(fileList, filepath=>_.includes(['.jpg', ',jpeg', '.png', '.webp', '.avif', '.gif'], path.extname(filepath).toLowerCase()))
  imageList = imageList.sort((a,b)=>a.localeCompare(b, undefined, {numeric: true, sensitivity: 'base'}))

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+ 14 other calls in file

manager.js

GitHub: pocketnetteam/pocketnet.gui

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var best = _.max(canuse, function(node){
    return node.statistic.rating()
})

if(!best || !best.statistic.rating()){
    best = _.find(self.initednodes(), function(node){
        return true //node.inited /*&& node.stable*/
    })
}

+ 15 other calls in file

proxy.js

GitHub: pocketnetteam/pocketnet.gui

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self.apibypath = function (path) {
	var result = null


	_.find(self.api, function (pack) {
		return _.find(pack, function (object) {

			if (object.path == path) {

				result = object

+ 15 other calls in file

render.js

GitHub: clay/amphora

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 */
function renderUri(uri, req, res, hrStart) {
  hrStart = hrStart || process.hrtime(); // Check if we actually have a start time


  return db.get(uri).then(function (result) {
    const route = _.find(uriRoutes, function (item) {
      return result.match(item.when);
    });


    if (!route) {

+ 6 other calls in file

parserbrowser.js

GitHub: rfdslabs/Mimosa-Framework

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  terminal: false
});

rl.on('line', function (line) {
  var result = parser.setUA(line).getResult();
  var found = _.find(uaArr, {
    browser: { name: result.browser.name, major: result.browser.major }
  });

  if (!found) {

pathways.js

GitHub: navgurukul/sansaar

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  logger.error(JSON.stringify(err));
  return h.response(err).code(err.code);
}

const pathways = _.compact(
  pathways_order.map((pathway_code) => _.find(data, { code: pathway_code }))
);

let pathway;
if (useV2) {

+ 2 other calls in file

display.js

GitHub: navgurukul/sansaar

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if (!eachClass.facilitator) {
  reg.facilitator = {};
  reg.facilitator.name = facilitator_name;
  reg.facilitator.email = facilitator_email;
}
const ifCurrentUserReg = _.find(registrations, { user_id: userId });
if (
  registrations.length < eachClass.max_enrolment ||
  eachClass.max_enrolment === null ||
  userId === facilitator_id ||

+ 3 other calls in file

externalCQLHandler.js

GitHub: AHRQ-CDS/AHRQ-CDS-Connect-Authoring-Tool

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const elmDefs = _.get(library, 'usings.def', []);
notFHIR = elmDefs.some(def => !['System', 'FHIR'].includes(def.localIdentifier));
if (notFHIR) break;

// Find FHIR version used by library
const fhirDef = _.find(elmDefs, { localIdentifier: 'FHIR' });
elmResults.fhirVersion = _.get(fhirDef, 'version', '');

const details = {};
details.cqlFileText = fileForELMResult ? fileForELMResult.text : '';

artifact.js

GitHub: AHRQ-CDS/AHRQ-CDS-Connect-Authoring-Tool

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    }
  };
  break;
case 'userType':
  code = context['userType'].split('user-')[1];
  tax = _.find(nuccProviderTaxonomy, { Code: code });
  display = tax['Classification'];
  if (!_.isEmpty(tax['Specialization'])) {
    display = tax['Specialization'];
  }

+ 2 other calls in file

packet.js

GitHub: node-lifx/lifx-lan-client

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if (type !== undefined) {
  // Check if type is valid
  if (typeof type === 'string' || type instanceof String) {
    obj.type = result(find(this.typeList, {name: type}), 'id');
  } else if (typeof type === 'number') {
    const typeMatch = find(this.typeList, {id: type});
    obj.type = result(typeMatch, 'id');
    type = result(typeMatch, 'name');
  }
  if (obj.type === undefined) {

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