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How to use the find function from ramda

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

ramda.find returns the first element in a list that satisfies a given predicate function.

helper.js

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if (R.keys(localIModelByLocale).includes(locale)) {
  continue;
}
const languageExtractor = (s) => R.slice(0, R.lastIndexOf("-", s), s);
const language = languageExtractor(locale);
const reusableLocale = R.find((k) => languageExtractor(k) === language)(R.keys(localIModelByLocale));
if (reusableLocale) {
  result.set(locale, {uri: localIModelByLocale[reusableLocale], canCopy: true});
} else {
  result.set(locale, {uri: templateIndexMap.INTERACTION_MODEL_BY_LANGUAGE[language], canCopy: false});

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+ 4 other calls in file

event.js

GitHub: opentok/interactive-broadcast-api

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const buildEvent = (props, eventData) => setDefaults(R.pick(props, eventData));
const buildOtData = userType => JSON.stringify({
  userType
});
const sortByCreatedAt = R.sortWith([R.ascend(R.prop('createdAt'))]);
const filterByStatus = status => R.find(R.propEq('status', status));
const getImages = R.pick(['startImage', 'endImage']);


/** Exports */

How does ramda.find work?

ramda.find is a higher-order function that takes a predicate function and a list, and returns the first element of the list that satisfies the predicate, or undefined if no such element is found.

When called with a predicate function and a list, it applies the predicate function to each element of the list until it finds the first element that satisfies the predicate, at which point it returns that element. If no element satisfies the predicate, it returns undefined. It does not modify the original list.

AuthMiddleware.js

GitHub: com2u/SVTrain

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const verify = curryN(2)(jwt.verify)


const isTheRightKid = (kid) => (publicKey) => publicKey.kid === kid


const findPublicKeyFromKid = (publicKey) => (kid) =>
  find(isTheRightKid(kid))(publicKey)


const getKid = path(['header', 'kid'])


const decode = compose(curryN(2), flip)(jwt.decode)

Adb.js

GitHub: miyabisun/auto-play-opencv-node

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get isWake () {
  return R.pipe(
    () => this.shell("dumpsys power").toString(),
    R.split("\n"),
    R.find(R.test(/mWakefulness\=\w+/)),
    R.trim,
    R.match(/mWakefulness\=(\w+)/),
    it => it[1] == "Awake",
  )();

Ai Example

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

const foundUser = R.find(R.propEq("id", 2))(users);
console.log(foundUser); // Output: { id: 2, name: 'Bob', age: 25 }

In this example, ramda.find is used to find a user object with an id of 2 in an array of user objects. The function R.propEq creates a predicate function that returns true when the id property of an object is equal to 2. ramda.find takes this predicate function as an argument and returns the first element in the users array that satisfies the predicate function, which is the user object with an id of 2 in this case.

update.js

GitHub: alexkorban/elm-catalog

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const taggedPackages = JSON.parse(taggedPackagesStr.slice(taggedPackagesStr.indexOf("[")))


console.log("Tagged packages: " + R.length(taggedPackages))


const merge = (package) => {
    taggedPkg = R.find(R.propEq("name", package.name), taggedPackages)
    if (!R.isNil(taggedPkg)) {
        let newPkg = R.mergeDeepRight(taggedPkg, package)
        if (taggedPkg.tags[0] == "exclude" && package.version != taggedPkg.version) {
            console.log("Re-evaluate: " + newPkg.name)

+ 3 other calls in file

utils.js

GitHub: leslie555/bsp

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  return R.defaultTo(defaultv, obj);
}


export function findfromArray(val, array = []) {
  let selectedDetail = {};
  selectedDetail = R.find(R.propEq('menuId', val))(array);
  if (!isNotNil(selectedDetail)) {
    selectedDetail = R.find(R.propEq('menuId', Number(val)))(array);
  }
  if (isNotNil(selectedDetail)) {

+ 7 other calls in file

upload.js

GitHub: Leechael/phat-contract-cli-upload

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  console.log(`Instantiate failed: ${err}`)
  console.error(err)
  return process.exit(1)
}

const instantiateEvent = R.find(R.pathEq(['event', 'method'], 'Instantiating'), instantiateResult.events)
console.log('instantiateEvent: ', instantiateEvent)
const contractId = R.path(['event', 'data', 'contract'], instantiateEvent)
console.log('Instantiated contract ID: ', contractId)

+ 339 other calls in file

selectors.js

GitHub: otpusk/apisearch-toolbox

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exports.getHotelsByCountry = getHotelsByCountry;


var getHotelByCountry = function getHotelByCountry() {
  return (0, _reselect.createSelector)(getHotelsByCountry(), getHotelID, function (hotels, id) {
    return R.find(function (hotel) {
      return hotel.id === id;
    }, hotels);
  });
};

+ 11 other calls in file

OrderJobService.js

GitHub: waltermitch/Trukt-Backend

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    .whereIn('jobGuid', serviceJobsFound)
    .whereNotNull('dateRequestedStart');

return serviceJobsFound?.reduce((allJobs, jobGuid) =>
{
    const jobToValidate = R.find(R.propEq('jobGuid', jobGuid))(jobsChecked);

    // If jobfound is not in jobsChecked array, it is because it does not have at leaast 1 stop with 1 commodity with date requested start
    if (!jobToValidate)
    {

pdf.js

GitHub: imec-int/innnobics-sahs-adapters

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  }
  return acc;
}, [], arr));


const findNextDuration = (index, arr) => {
  const duration = R.find((item) => isDuration(item.str), R.drop(index, arr));
  return toDuration(duration?.str);
};


function findTitledItemIndex(title, items) {

index.js

GitHub: muqsitnawaz/deepcoin

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let rejectedTransactions = [];
let selectedTransactions = [];
R.forEach((transaction) => {
    // Check if any of the inputs is found in the selectedTransactions or in the blockchain
    let transactionInputFoundAnywhere = R.map((input) => {
        let findInputTransactionInTransactionList = R.find(
            R.whereEq({
                'transaction': input.transaction,
                'index': input.index
            }));

index.js

GitHub: muqsitnawaz/deepcoin

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getBlockByIndex(index) {
    return R.find(R.propEq('index', index), this.blocks);
}

getBlockByHash(hash) {
    return R.find(R.propEq('hash', hash), this.blocks);
}

getLastBlock() {
    return R.last(this.blocks);

+ 7 other calls in file

admin.controller.js

GitHub: AJBeere/moneyhub-takehome

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const axios = require('axios')
const config = require("config")
const R = require('ramda')

exports.getCompanyName = function(companyData, id) {
  return R.find(R.propEq('id', id))(companyData).name
}

exports.getInvestmentData = async function() {
  try {

bundle.js

GitHub: brrf/practice-projects

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 * @see R.transduce
 * @example
 *
 *      const xs = [{a: 1}, {a: 2}, {a: 3}];
 *      R.find(R.propEq('a', 2))(xs); //=> {a: 2}
 *      R.find(R.propEq('a', 4))(xs); //=> undefined
 */




var find = /*#__PURE__*/_curry2( /*#__PURE__*/_dispatchable(['find'], _xfind, function find(fn, list) {

+ 3 other calls in file

day04.js

GitHub: jcla1/AdventOfCode

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    R.flatten);


const winningScore = R.reduce((boards, n) => {
  boards = R.map(markNumber(n), boards);


  const winner = R.find(isWinner, boards);
  if (winner) {
    return R.reduced(n * score(winner));
  }

index.js

GitHub: VesaLahd/aoc2022

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const isTest = checkHead('Test')
const parseTest = R.compose(
  createFromKey('test'),
  R.curry((n, value) => R.compose(R.equals(0), R.modulo(R.__,n))(value)),
  R.find(R.complement(isNaN)),
  R.map(Number)
)


const isBranch = checkHead('If')

+ 3 other calls in file

contacts.js

GitHub: Stardev1127/cloud-crm

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}

if (source_id && typeof source_id === 'string') {
  let source_name = R.pipe(
    // find
    R.find(R.propEq('id', source_id)),

    // get name
    R.prop('name')
  )(sources.sources)

+ 7 other calls in file

index.js

GitHub: DPANET/PrayersHomeySDK3

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        ]
    }
];
function getPrayersByDate(date) {
    let fnDayMatch = (n) => prayers_lib_1.DateUtil.dayMatch(date, n.prayersDate);
    return ramda.find(fnDayMatch, prayers);
}
function getPrayerTime(prayerName, prayerDate) {
    prayerDate = ((0, prayers_lib_1.isNullOrUndefined)(prayerDate) ? prayers_lib_1.DateUtil.getNowTime() : prayerDate);
    let prayersByDate = getPrayersByDate(prayerDate);

+ 3 other calls in file

ItemMockCtrl.js

GitHub: s-dupuis/formation-christelle

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    throw new Error('Item fields are not valid');
  }
};

const getById = (id) => {
  return R.find(R.propEq('id', id), items);
};

const remove = (id) => {
  const itemDeleted = R.find(R.propEq('id', id), items);

+ 3 other calls in file

part2.js

GitHub: dvsource1/ramda-playground

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* eg:
* R.all, R.any, R.none
* R.chain
* R.drop, R.dropWhile
* R.filter, R.reject
* R.find...
* R.forEach
* R.groupBy, R.groupWith
* R.map, R.mapAccum, R.mapAccumRight
* R.reduce...

+ 2 other calls in file

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