How to use the pullAt function from lodash

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

lodash.pullAt is a function in the Lodash library that removes elements from an array based on their indices.

helpers.js

GitHub: feathersjs-ecosystem/feathers-swagger

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// remove from array
if (pathArray.length) {
  const parent = _.get(object, pathArray);
  if (_.isArray(parent)) {
    return _.pullAt(parent, leavePath);
  }
}

return _.unset(object, path);

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lodash-contrib.commonjs.js

GitHub: node4good/lodash-contrib

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module.exports.propertyOf          = _.propertyOf;
module.exports.pull                = _.pull;
module.exports.pullAll             = _.pullAll;
module.exports.pullAllBy           = _.pullAllBy;
module.exports.pullAllWith         = _.pullAllWith;
module.exports.pullAt              = _.pullAt;
module.exports.quaternary          = _.quaternary;
module.exports.rCurry              = _.rCurry;
module.exports.random              = _.random;
module.exports.range               = _.range;

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+ 92 other calls in file

How does lodash.pullAt work?

lodash.pullAt works by taking an array and a set of indices as input and removing the elements at the specified indices from the array.

The function first creates a new array to hold the removed elements and then removes each element from the input array using its index.

lodash.pullAt modifies the input array in place and returns the array of removed elements.

For example, if the input array is [1, 2, 3, 4, 5] and the indices to remove are [1, 3], then the resulting array will be [2, 4], and the modified input array will be [1, 3, 5].

By using lodash.pullAt, developers can easily remove elements from an array based on their indices without the need for writing repetitive code to splice the array.

lodash.js

GitHub: mdmarufsarker/lodash

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console.log(pullAllBy); // => [{ 'x': 2 }]


const pullAllWith = _.pullAllWith([{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }], [{ 'x': 3, 'y': 4 }], _.isEqual);
console.log(pullAllWith); // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]


const pullAt = _.pullAt(['a', 'b', 'c', 'd'], [1, 3]);
console.log(pullAt); // => ['b', 'd']


const remove = _.remove([1, 2, 3, 4], n => n % 2 === 0);
console.log(remove); // => [2, 4]

+ 15 other calls in file

routes.js

GitHub: maria-b-s/seas

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if (req.session.data.prevNames) {
    prevNames = req.session.data.prevNames;
}

if (req.query.item && Number.isInteger(Number(req.query.item)) && prevNames[Number(req.query.item) - 1]) {
    _.pullAt(prevNames, [Number(req.query.item) - 1]);
}

req.session.data.prevNames = prevNames;

+ 4 other calls in file

Ai Example

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const _ = require("lodash");

const array = [1, 2, 3, 4, 5];
const indices = [1, 3];

const removed = _.pullAt(array, indices);

console.log(removed); // [2, 4]
console.log(array); // [1, 3, 5]

In this example, we use lodash.pullAt to remove elements from an array based on their indices. We first define an input array array containing five elements and an array of indices indices containing two indices. We then pass the array and indices to _.pullAt() to remove the elements at the specified indices from the array. The function returns an array of the removed elements, which is then logged to the console. The array is also modified in place, with the removed elements no longer present, which is also logged to the console. By using lodash.pullAt in this way, we can easily remove elements from an array based on their indices without the need for writing repetitive code to splice the array.

routes.js

GitHub: maria-b-s/seas

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    current_addresses = req.session.data['current_addresses'];
}

if(req.query.type == 'previous'){
    if (req.query.item && Number.isInteger(Number(req.query.item)) && previous_addresses[Number(req.query.item) - 1]) {
        _.pullAt(previous_addresses, [Number(req.query.item) - 1]);
    }
}

if(req.query.type == 'current'){

+ 8 other calls in file

arraydemo.js

GitHub: Hupeng7/es6demo

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console.log('pullAllWith1--->', pullAllWith1);
//pullAllWith1---> [ { x: 1, y: 2 }, { x: 5, y: 6 } ]


//_.pullAt(array,[indexs])
let pullAtArr = ['a', 'b', 'c', 'd'];
let pullAt1 = _.pullAt(pullAtArr, [1, 3]);
console.log('pullAt1--->', pullAt1);
//pullAt1---> [ 'b', 'd' ]


//_.remove(array,[predicate=_.indentity])

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