You can install lodash.isequal as a single module without installing the whole lodash package like so: npm install –save lodash.isequal When using ECMAScript 5 and CommonJS modules, you then import it like this: var isEqual = require(‘lodash.isequal’); Using ES6 modules, this would be: import isEqual from ‘lodash.isequal’; And you can use it in your code: … Read more
As of lodash 3.5.0 you can use sortByOrder (renamed orderBy in v4.3.0): var data = _.sortByOrder(array_of_objects, [‘type’,’name’], [true, false]); Since version 3.10.0 you can even use standard semantics for ordering (asc, desc): var data = _.sortByOrder(array_of_objects, [‘type’,’name’], [‘asc’, ‘desc’]); In version 4 of lodash this method has been renamed orderBy: var data = _.orderBy(array_of_objects, [‘type’,’name’], … Read more
As lyyons pointed out in the comments, more idiomatic and lodashy way to do this would be to use _.remove, like this _.remove(obj.subTopics, { subTopicId: stToDelete }); Apart from that, you can pass a predicate function whose result will be used to determine if the current element has to be removed or not. _.remove(obj.subTopics, function(currentObject) … Read more
I ended up finding it through the IntelliSense on the get() function. So, I’ll post it here for anyone who is looking for similar information. Anyways, the syntax is nearly identical, but slightly different. Instead of using URLSearchParams() the parameters need to be initialized as HttpParams() and the property within the get() function is now … Read more
You can do var arr = _.values(obj); For documentation see here.
Since version v4.x you should use _.map: _.map(users, ‘id’); // [12, 14, 16, 18] this way it is corresponds to native Array.prototype.map method where you would write (ES2015 syntax): users.map(user => user.id); // [12, 14, 16, 18] Before v4.x you could use _.pluck the same way: _.pluck(users, ‘id’); // [12, 14, 16, 18]
You can simply chain _.omit() with _.isUndefined and _.isNull compositions, and get the result with lazy evaluation. Demo var result = _(my_object).omit(_.isUndefined).omit(_.isNull).value(); Update March 14, 2016: As mentioned by dylants in the comment section, you should use the _.omitBy() function since it uses a predicate instead of a property. You should use this for lodash … Read more
Lodash has a _.pickBy function which does exactly what you’re looking for. var thing = { “a”: 123, “b”: 456, “abc”: 6789 }; var result = _.pickBy(thing, function(value, key) { return _.startsWith(key, “a”); }); console.log(result.abc) // 6789 console.log(result.b) // undefined <script src=”https://cdn.jsdelivr.net/lodash/4.16.4/lodash.min.js”></script>
You can use findIndex to find the index in the array of the object and replace it as required: var item = {…} var items = [{id:2}, {id:2}, {id:2}]; var foundIndex = items.findIndex(x => x.id == item.id); items[foundIndex] = item; This assumes unique IDs. If your IDs are duplicated (as in your example), it’s probably … Read more
import has from ‘lodash/has’; is better because lodash holds all it’s functions in a single file, so rather than import the whole ‘lodash’ library at 100k, it’s better to just import lodash’s has function which is maybe 2k.