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How to use the intersection function from lodash

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

lodash.intersection is a function in the Lodash library that returns an array containing the values that are present in all input arrays.

astrobench.js

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 * @category Arrays
 * @param {...Array} [array] The arrays to inspect.
 * @returns {Array} Returns an array of shared values.
 * @example
 *
 * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
 * // => [1, 2]
 */
function intersection() {
  var args = [],

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lodash-contrib.commonjs.js

GitHub: node4good/lodash-contrib

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module.exports.inc                 = _.inc;
module.exports.includes            = _.includes;
module.exports.indexOf             = _.indexOf;
module.exports.initial             = _.initial;
module.exports.interpose           = _.interpose;
module.exports.intersection        = _.intersection;
module.exports.intersectionBy      = _.intersectionBy;
module.exports.intersectionWith    = _.intersectionWith;
module.exports.invert              = _.invert;
module.exports.invertBy            = _.invertBy;

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+ 92 other calls in file

How does lodash.intersection work?

In the Lodash library, lodash.intersection is a function that takes two or more arrays as input and returns an array containing the values that are present in all input arrays. The lodash.intersection function works by iterating over the first array and checking if each element is present in all of the other input arrays. It returns an array containing only the values that are present in all of the input arrays. If any of the input arrays are empty, the function will return an empty array. Here's an example implementation of lodash.intersection that demonstrates how the function works: javascript Copy code {{{{{{{ const _ = require('lodash'); const array1 = [1, 2, 3]; const array2 = [2, 3, 4]; const array3 = [3, 4, 5]; const intersection = _.intersection(array1, array2, array3); console.log(intersection); In this example, we first import the lodash library. We then define three arrays array1, array2, and array3. We call _.intersection(array1, array2, array3) to find the intersection of all three arrays. The resulting array intersection contains the values that are present in all three arrays. The contents of intersection are then logged to the console. Overall, lodash.intersection provides a powerful way to find the common elements among multiple arrays. By allowing you to easily compare the contents of multiple arrays, Lodash provides a flexible and efficient way to work with arrays in JavaScript.

gulpfile.js

GitHub: gcidea/html5-draggable

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// replace excluded style
includedStyleDep = _.uniq(includedStyleDep);
excludedStyleDep = _.uniq(excludedStyleDep);

var intersectionDep = _.intersection(includedStyleDep, excludedStyleDep);
excludedStyleDep = _.xor(excludedStyleDep, intersectionDep);

// console.log(includedStyleDep);
// console.log(excludedStyleDep);

day21a.js

GitHub: jared-hughes/adventofcode

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let allAllergens = new Set()
L.map(e => e[1].map(f=>allAllergens.add(f)))
let allIngredients = []
L.map(e => e[0].map(f=>allIngredients.push(f)))
let possible = [...allAllergens].map(a => {
  return _.intersection(...L.filter(e => e[1].includes(a)).map(e => e[0]))
})
let canHaveAllergen = _.union(...possible)
let none = allIngredients.filter(e => !canHaveAllergen.includes(e))
clog(allAllergens)

Ai Example

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const _ = require("lodash");

const array1 = [1, 2, 3];
const array2 = [2, 3, 4];
const array3 = [3, 4, 5];

const intersection = _.intersection(array1, array2, array3);

console.log(intersection);

In this example, we first import the lodash library. We then define three arrays array1, array2, and array3. We call _.intersection(array1, array2, array3) to find the intersection of all three arrays. The resulting array intersection contains the values that are present in all three arrays. The contents of intersection are then logged to the console. Overall, lodash.intersection provides a powerful way to find the common elements among multiple arrays. By allowing you to easily compare the contents of multiple arrays, Lodash provides a flexible and efficient way to work with arrays in JavaScript.

create-group-version-branch.js

GitHub: greenkeeperio/greenkeeper

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if (
  _.includes(config.ignore, dependency) ||
  (monorepoGroupName && _.includes(config.ignore, monorepoGroupName)) ||
  (relevantDependencies.length &&
    _.intersection(config.ignore, relevantDependencies).length === relevantDependencies.length) ||
  _.includes(config.groups[groupName].ignore, dependency) ||
  (monorepoGroupName && _.includes(config.groups[groupName].ignore, monorepoGroupName)) ||
  (relevantDependencies.length &&
    _.intersection(config.groups[groupName].ignore, relevantDependencies).length === relevantDependencies.length)

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+ 3 other calls in file

index.js

GitHub: sluukkonen/iiris

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      return xs.filter((x) => ysSet.has(x))
    }
    return {
      iiris: () => A.from(S.intersection(S.from(arr), S.from(clone))),
      ramda: () => R.intersection(arr, clone),
      lodash: () => _.intersection(arr, clone),
      native: () => nativeIntersection(arr, clone),
    }
  },
},

lodash.js

GitHub: mdmarufsarker/lodash

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console.log(indexOf); // => 1


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


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


const intersectionBy = _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
console.log(intersectionBy); // => [2.1]

+ 15 other calls in file

wObjectHelper.js

GitHub: Waiviogit/waivio-api

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const waivioAdmins = await getWaivioAdminsAndOwner();

/** Get app admins, wobj administrators, which was approved by app owner(creator) */
const owner = _.get(app, 'owner');
const admins = _.get(app, 'admins', []);
const ownership = _.intersection(_.get(obj, 'authority.ownership', []), _.get(app, 'authority', []));
const administrative = _.intersection(_.get(obj, 'authority.administrative', []), _.get(app, 'authority', []));
const blacklist = await getBlacklist(_.uniq([owner, ...admins, ...waivioAdmins]));
/** If flag hiveData exists - fill in wobj fields with hive data */
if (hiveData) {

+ 5 other calls in file

index.js

GitHub: Eveble/eveble

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    return this.stringifyObject(obj, inspectOptions);
}
stringifyClassProps(entry, metadata, inspectOptions = {}) {
    const allProps = Object.keys(entry.target);
    const requiredProps = metadata.keys instanceof Array
        ? lodash.intersection(allProps, metadata.keys)
        : allProps;
    const obj = {};
    for (const propName of requiredProps) {
        obj[propName] = entry.target[propName];

+ 4 other calls in file

queries.js

GitHub: NikolaJacques/error-logger-back-end

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    const stackFilter = (array) => {
        const arr = [];
        for (let item of array) {
            arr.push(item.split('at'));
        }
        return _.intersection(...arr).join('at');
    };
    const aggregatedLogs = logs.map(log => (Object.assign(Object.assign({}, log), { stack: stackFilter(log.stack) })));
    return { logs: aggregatedLogs, total: logs.length === 0 ? 0 : total[0].total };
};

frontend-config-creator.js

GitHub: aws-amplify/amplify-cli

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const pinpointAnalytics = pinpointResources.filter(
  (it) => _.intersection(Object.keys(it.output), Object.keys(channelMapping)).length === 0,
);
const pinpointNotifications = pinpointResources.filter(
  (it) => _.intersection(Object.keys(it.output), Object.keys(channelMapping)).length !== 0,
);

if (pinpointAnalytics.length !== 0) {
  // legacy

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jsHarmony.LoadModels.js

GitHub: apHarmony/jsharmony

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function ParseModelRoles(jsh, model, srcmodelid, srcactions) {
  var _this = jsh;


  function validateSiteRoles(model, tmodel, prefix, suffix, roles){
    var childSites = _.intersection(model.sites, tmodel.sites);
    var parentSites = model.sites;
    if(roles){
      var roleSites = Helper.GetRoleSites(roles);
      childSites = _.intersection(childSites, roleSites);

+ 3 other calls in file

helper.js

GitHub: topcoder-platform/member-api

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  if (canManageMember(currentUser, subjectUser)) {
    return groups
  }
  const currentUserGroups = await getMemberGroups(currentUser.userId)
  currentUserGroups.push(config.PUBLIC_GROUP_ID)
  const commonGroups = _.intersection(groups, currentUserGroups)
  return _.difference(commonGroups, config.PRIVATE_GROUP_IDS)
}


async function getMemberGroups (memberId) {

+ 3 other calls in file

wObjectHelper.js

GitHub: Waiviogit/waivio-api

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const waivioAdmins = await getWaivioAdminsAndOwner();

/** Get app admins, wobj administrators, which was approved by app owner(creator) */
const owner = _.get(app, 'owner');
const admins = _.get(app, 'admins', []);
const ownership = _.intersection(
  _.get(obj, 'authority.ownership', []), _.get(app, 'authority', []),
);
const administrative = _.intersection(
  _.get(obj, 'authority.administrative', []), _.get(app, 'authority', []),

+ 11 other calls in file

vanilla.js

GitHub: topcoder-platform/challenge-forum-processor

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const { body: user } = await vanillaClient.getUser(vanillaUser.userID)
vanillaUser = user

// Sync Topcoder roles
const allCurrentUserRoleIDs = _.map(vanillaUser.roles, 'roleID')
const currentVanillaRoleIDs = _.intersection(allCurrentUserRoleIDs, nonTopcoderRoleIDs)
const userData = {
  roleID: [...currentVanillaRoleIDs, ...userTopcoderRoleIDs]
}
await vanillaClient.updateUser(vanillaUser.userID, userData)

+ 6 other calls in file

common.js

GitHub: briancoxGit/Jazz

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        input: "Empty String are removed from fields"
    });
};


var validateNotEditableFieldsInUpdate = function (service_data, fields_list, onComplete) {
    var invalid_fields = _.intersection(_.keys(service_data), _.values(fields_list));
    _.forEach(invalid_fields, function (value, key) {
        delete service_data[value];
    });

+ 7 other calls in file

programHelper.js

GitHub: agamdahiya/contribute

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_.map(programs, program => {
  const medium = _.get(program, 'medium') || _.get(program, 'program.dataValues.medium') || null;
  const gradeLevel = _.get(program, 'gradeLevel') || _.get(program, 'program.dataValues.gradeLevel') || null;
  const subject = _.get(program, 'subject') || _.get(program, 'program.dataValues.subject') || null;

  program.matchCount =  _.intersection(JSON.parse(medium), sort.medium).length
    + _.intersection(JSON.parse(gradeLevel), sort.gradeLevel).length
    + _.intersection(JSON.parse(subject), sort.subject).length;
  return program;
});

+ 2 other calls in file

sorted.js

GitHub: HomieOmie/nodebb-temp

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    });
}

async function getCidTids(params) {
    if (params.tags.length) {
        return _.intersection(...await Promise.all(params.tags.map(async (tag) => {
            const sets = params.cids.map(cid => `cid:${cid}:tag:${tag}:topics`);
            return await db.getSortedSetRevRange(sets, 0, -1);
        })));
    }

+ 7 other calls in file

user.js

GitHub: Ochuwa-sophie/Testing-Signals

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let data = _.cloneDeep(dataToClone);
const lookupRole = data.role;

// Ensure only valid fields/columns are added to query
if (options.columns) {
    options.columns = _.intersection(options.columns, this.prototype.permittedAttributes());
}

delete data.role;
data = _.defaults(data || {}, {

post.js

GitHub: Ochuwa-sophie/Testing-Signals

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const META_ATTRIBUTES = _.without(ghostBookshelf.model('PostsMeta').prototype.permittedAttributes(), 'id', 'post_id');

// NOTE: only include post_meta relation when requested in 'columns' or by default
//       optimization is needed to be able to perform .findAll on large SQLite datasets
if (!options.columns || (options.columns && _.intersection(META_ATTRIBUTES, options.columns).length)) {
    options.withRelated = _.union(['posts_meta'], options.withRelated || []);
}

return options;

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