Home

Index

How to use the first function from lodash

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

The lodash.first function returns the first element of an array.

astrobench.js

5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
*  style callback, respectively.
* @param {*} [thisArg] The `this` binding of `callback`.
* @returns {*} Returns the first element(s) of `array`.
* @example
*
* _.first([1, 2, 3]);
* // => 1
*
* _.first([1, 2, 3], 2);
* // => [1, 2]

711

+ 7 other calls in file

lodash-contrib.commonjs.js

GitHub: node4good/lodash-contrib

119
120
121
122
123
124
125
126
127
128
module.exports.findIndex           = _.findIndex;
module.exports.findKey             = _.findKey;
module.exports.findLast            = _.findLast;
module.exports.findLastIndex       = _.findLastIndex;
module.exports.findLastKey         = _.findLastKey;
module.exports.first               = _.first;
module.exports.firstExisting       = _.firstExisting;
module.exports.fix                 = _.fix;
module.exports.flatMap             = _.flatMap;
module.exports.flatMapDeep         = _.flatMapDeep;

122

+ 92 other calls in file

How does lodash.first work?

The lodash.first function is a utility function in the Lodash library that returns the first element of an array. The function takes two arguments: the first argument is the array to be processed, and the second argument is optional and specifies the number of elements to return. If the second argument is not provided, the function returns the first element of the array. If the input array is empty, the function returns undefined. For example, the following code uses lodash.first to return the first element of an array: javascript Copy code {{{{{{{ const _ = require('lodash'); const numbers = [1, 2, 3, 4, 5]; const firstNumber = _.first(numbers); console.log(firstNumber); // Output: 1 In this example, we have an array of numbers and use lodash.first to return the first element of the array. The resulting firstNumber variable contains the value 1. If we wanted to return the first two elements of the array, we could pass 2 as the second argument to lodash.first: javascript Copy code {{{{{{{ class="!whitespace-pre hljs language-javascript">const _ = require('lodash'); const numbers = [1, 2, 3, 4, 5]; const firstTwoNumbers = _.first(numbers, 2); console.log(firstTwoNumbers); // Output: [1, 2] In this example, we pass numbers as the first argument and 2 as the second argument to lodash.first, which returns the first two elements of the array in a new array. Overall, the lodash.first function provides a simple way to access the first element or elements of an array.

04-multiSort.js

GitHub: Thinkful-Ed/node-lodash

0
1
2
3
4
5
6
7
8
9
const _ = require('lodash')
const courses = require('../data/courses')
const skills = require('../data/skills')
const languages = require('../data/languages')

const sampleCourse = _.first(courses);

function getSortingOption(field){
  return ( _.has(sampleCourse, field) )
    ? field

packExternalModules.js

GitHub: danielholmes/serverless-webpack

50
51
52
53
54
55
56
57
58
59
  // If we have a scoped module we have to re-add the @
  if (_.startsWith(externalModule, '@')) {
    splitModule.splice(0, 1);
    splitModule[0] = '@' + splitModule[0];
  }
  const moduleName = _.first(splitModule);
  return _.includes(packageForceExcludes, moduleName);
});

if (log && !_.isEmpty(excludedModules)) {

408

Ai Example

1
2
3
4
5
6
7
8
const _ = require("lodash");

const letters = ["a", "b", "c", "d"];

const firstLetter = _.first(letters);

console.log(firstLetter);
// Output: 'a'

In this example, we have an array of letters and use lodash.first to return the first element of the array. The resulting firstLetter variable contains the value 'a'. If we wanted to return the first three letters of the array, we could pass 3 as the second argument to lodash.first: javascript Copy code

index.js

GitHub: gardener/dashboard

148
149
150
151
152
153
154
155
156
157
158
159
}


async function findExistingTerminalResource ({ user, namespace, body }) {
  const { identifier } = body
  const existingTerminalList = await listTerminals({ user, namespace, identifier })
  return _.first(existingTerminalList)
}


async function deleteTerminalSession ({ user, body }) {
  const username = user.id

199

+ 3 other calls in file

ChallengeService.js

GitHub: topcoder-platform/challenge-api

2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
 */
async function deleteChallenge(currentUser, challengeId) {
  const { items } = await challengeDomain.scan({
    criteria: getScanCriteria({ id: challengeId, status: constants.challengeStatuses.New }),
  });
  const challenge = _.first(items);
  if (!challenge) {
    throw new errors.NotFoundError(
      `Challenge with id: ${challengeId} doesn't exist or is not in New status`
    );

contentful.js

GitHub: nsbarsukov/ml-bug-detector

25
26
27
28
29
30
31
32
33
34
headers: {},
method: 'get',
url: [
  this.options.secure ? 'https' : 'http',
  '://',
  _.first(this.options.host.split(':')),
  ':',
  this.options.secure ? '443' : '80',
  '/spaces/',
  this.options.space,

+ 353 other calls in file

lodash.js

GitHub: mdmarufsarker/lodash

42
43
44
45
46
47
48
49
50
51
52
53
54
console.log(findIndex); // => 0


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


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


const flatten = _.flatten([1, [2, [3, [4]], 5]]);
console.log(flatten); // => [1, 2, [3, [4]], 5]

+ 15 other calls in file

ddlProvider.js

GitHub: hackolade/PostgreSQL

544
545
546
547
548
549
550
551
552
553
	),
	'columns',
);
const uniqueKeyOptions = _.omit(
	keyHelper.hydrateUniqueOptions({
		options: _.first(jsonSchema.uniqueKeyOptions) || {},
		columnName: columnDefinition.name,
		isActivated: columnDefinition.isActivated,
		jsonSchema: parentJsonSchema,
		dbVersion,

common.js

GitHub: beyowi/strapi-plugin-content-moderation

98
99
100
101
102
103
104
105
106
107
      : refusedUserTemplate;
} else {
  const labelConfig = this.getConfig('contentLabel');
  const labelFields =
    slug in labelConfig ? labelConfig[slug] : labelConfig['*'];
  contentLabel = first(
    Object.keys(content)
      .filter((_) => labelFields === _ || labelFields.includes(_))
      .map((_) => content[_])
      .filter((_) => _)

agent-runner.js

GitHub: Fliplet/fliplet-agent

150
151
152
153
154
155
156
157
158
159

const organizations = await this.api.request({
  url: 'v1/organizations'
}).then((response) => response.data.organizations);

const organization = _.first(organizations);

organizationId = organization.id;

log.debug(`Fetched organization ${organization.name}`);

+ 19 other calls in file

userController.js

GitHub: sdaigle2/Abacus-mvp

202
203
204
205
206
207
208
209
210
211
      });
    } 
    else{
    console.log('call back of updateOrInsertAllEntriesPr from userController')
// cartArr=cartArr.result
var cart = _.first(cartArr);
// console.log(cart)
var cart_id= cart.id
if(cart.id === undefined)
    cart_id = cart._id

+ 12 other calls in file

mount-models.js

GitHub: Akemona/strapi

258
259
260
261
262
263
264
265
266
267
if (type === 'component') {
  if (Array.isArray(returned[name])) {
    const components = returned[name].map(parseComponentRef);
    // Reformat data by bypassing the many-to-many relationship.
    returned[name] =
      attribute.repeatable === true ? components : _.first(components) || null;
  }
}

if (type === 'dynamiczone') {

settings.js

GitHub: sweetmiss0923/cgm-remote-monitor

395
396
397
398
399
400
401
402
403
404

  return snoozeTime;
}

function snoozeFirstMinsForAlarmEvent (notify) {
  return _.first(snoozeMinsForAlarmEvent(notify));
}

settings.eachSetting = eachSettingAs();
settings.eachSettingAsEnv = eachSettingAs('env');

+ 3 other calls in file

gulpfile.js

GitHub: achinwo/irev-exporter

214
215
216
217
218
219
220
221
222
223
if(!fn.startsWith('data_ward_')) continue;

const data = require(`./build/${fn}`);

const lgaData = require(`./build/data_lgas_${_.first(data.wards).state_id}.json`);
const stateName = _.first(lgaData.data).state.name;

const lgaName = _.first(data.lgas).name;

//if(stateName.toLowerCase() !== 'ogun') continue;

gulpfile.js

GitHub: achinwo/irev-exporter

798
799
800
801
802
803
804
805
806
807
const client = getAwsClient();

const destPrefix = 'irev-exporter/results/irev_guber'
const refdataDestPrefix = 'irev-exporter/refdata/irev_guber'

const lgaObj = _.first(data.lgas);
const lgaDirName = _.snakeCase(lgaObj.name);
const wardObj = _.first(data.wards);
const stateRes = await models.IrevWard.query().select('state_name', 'state_id').where('ward_uid', wardObj._id);
const stateMap = _.fromPairs(stateRes.map(r => [_.toInteger(r.stateId), r.stateName]));

+ 49 other calls in file

layoutBuilder.js

GitHub: MATC21/ITQ

77
78
79
80
81
82
83
84
85
86
});

return _.any(linearNodeList, function (node, index, followingNodeList) {
  if (node.pageBreak !== 'before' && !node.pageBreakCalculated) {
    node.pageBreakCalculated = true;
    var pageNumber = _.first(node.nodeInfo.pageNumbers);

var followingNodesOnPage = _.chain(followingNodeList).drop(index + 1).filter(function (node0) {
      return _.contains(node0.nodeInfo.pageNumbers, pageNumber);
    }).value();

+ 11 other calls in file

index.js

GitHub: david-marstree/treeRDS

170
171
172
173
174
175
176
177
178
179
180
181
 * @param {*} condition mixed
 * @returns {*} object
 */
const getOne = async (conn, tableName, condition) => {
    const result = await get(conn, tableName, { ...condition, limit: 1 });
    return (result) ? _.first(result) : result;
}

+ 3 other calls in file

programService.js

GitHub: agamdahiya/contribute

393
394
395
396
397
398
399
400
401
402
const osOrgSeachErr = {"error": true, "msg": "OS search error: Error while searching OsOrg for orgId ${rootorg_id}"};

searchRegistry(orgRequest, reqHeaders).then((orgRes)=> {
  if (orgRes && orgRes.status == 200) {
    if (orgRes.data.result.Org.length > 0) {
      returnRes['osOrgforRootOrg'] = _.first(orgRes.data.result.Org);
      return resolve(returnRes);
    } else {
      returnRes['osOrgforRootOrg'] = {};
      return resolve(returnRes);

+ 23 other calls in file

programHelper.js

GitHub: agamdahiya/contribute

946
947
948
949
950
951
952
953
954
955
  }
};

registryService.searchRecord(value, (err, res) => {
  if (!err && res) {
    const user = _.first(res.data.result.User);
    const updateRequestBody = {};
    updateRequestBody['body'] = {
      "id": "open-saber.registry.update",
      "ver": "1.0",

Other functions in lodash

Sorted by popularity

lodash.get is the most popular function in lodash (7670 examples)

Other popular packages:

Home

About