5,737 questions
0
votes
0
answers
152
views
Conflict between lodash.js and underscore.js
I am working on integrating a plugin into my application which resulted in lodash.js and underscore.js conflict. I have underscore.js implemented in my entire application and this plugin which I am ...
- 192
1
vote
1
answer
56
views
Inserting unique attribute to HML tag element in loop
I have a supersite that uses all kinds of js, including backbone.js and underscore.js. On one of my pages, I have the piece of code below:
<#loop:main_tlds_price_add#>
<tr>
<td ...
- 372
1
vote
2
answers
51
views
Sort Backbone Collection based on a file order list
I have a inherited a system that utilizes a Backbone collection of files that needs to be sorted based on a series of values. The order variable is saved when you slide different files into a position ...
- 39
0
votes
1
answer
61
views
Arguments object not working on Underscore first type function
For an exercise, I have to reproduce the first function from the Underscore.js library.
The code I wrote passes all the tests, except "should work on an arguments object".
I passed these ...
- 21
1
vote
0
answers
38
views
Uncaught TypeError: App.Routers.Maintenances.MyRouter is not a constructor
I am using backbone js as frontend in rails 7 application. In index.html file I have called backbone main file. code is coming in this file. But here I have initialise router file. In which getting ...
0
votes
1
answer
371
views
Error type DeepTypeOfCollection is not generic
While running NG BUILD, I am getting an error: type DeepTypeOfCollection is not generic. Also Type alias DeepTypeOfCollection circularly references itself.
- 7,173
0
votes
0
answers
33
views
Why _.clone() doesn't copy object methods?
I use the underscore library to copy objects, the _.clone() method. And this method works differently on different versions of angular, or maybe the problem is something else?
F.e:
class FooBar {
...
- 1
0
votes
1
answer
216
views
Why do sites that use lodash or underscore not work in Opera?
For whatever reason, some update in Opera has caused me to get frustrated for about a week now trying to figure out why Opera no longer works on my productivity sites - like StreamTime or Elementor (...
- 512
0
votes
1
answer
344
views
Returning the last computed result in a throttled function
I am working on a exercise based of the underscore _.throttle function. Our function is slightly modified as we have the return the last computed result if the _.throttle function is still waiting to ...
- 53
1
vote
2
answers
103
views
How to skip over the first iteration when one argument is undefined?
I am working on an exercise that is based on the reduce exercise from underscore.js. Now, I have a solution that works but I believe it can be done better since I used a lot of copy pasting in my ...
- 53
0
votes
1
answer
61
views
_lodash, sort by 2 fields(numbers, time)
I have an array of object with data:
items = [
{
....someFields
timeFrom: {
hour: 17,
minute: 15
}
},
{
....someFields
timeFrom: {
hour: 12,
...
- 199
0
votes
5
answers
104
views
Merge array of objects with array values into a single object
Using plain JavaScript or lodash, what's the easiest way to transform an array of objects into a single object, while concatenating any array values?
I can achieve it on a single property using _....
- 42k
0
votes
1
answer
35
views
How to chain Underscore methods to populate an object from nested array?
I have an array of objects - say, NFL teams. Each object (team) has a property - array of first names of team players.
var nflTeams = [
{ name: 'Kansas City Chiefs', playersFirstNames: ['Shane', ...
0
votes
2
answers
100
views
Having a problem with rewriting invoke function inspired by underscore library
I'm a beginner and trying to rewrite an underscore function _.invoke.
I'm trying to make the function so it returns an array with the results of calling the method on each value in the collection.
_....
- 25
0
votes
3
answers
89
views
Javascript find objects that contain matching elements from arrays in another object
I have two objects:
const people = [
{
name: "Dave",
fruit: ["apple", "pear"],
veg: ["asparagus", "peas"]
},
{
name: "Frank",...
- 321
0
votes
2
answers
903
views
Using Underscore.js with require.js: Uncaught ReferenceError: _ is not defined
I have Underscore.js 1.13.2 and I include it using requireJS 2.1.14.
paths = {
'underscore': my_folder_path + "/underscore", // for underscore.js
.. //path of other files
}
I see in the ...
- 2,193
1
vote
2
answers
36
views
how to group nested obects using underscorejs and get the matching data length
How to group the matching data in array of object and get the matching data length to get the average value.
var getdataObj = [{
"finalUrl": "https://www.amazon.in/",
"fetchTime": "2022-10-...
- 936
1
vote
2
answers
49
views
Determining incomplete sections in Javascript object
I have a JavaScript object with several properties:
{
banking: {
account_number: null,
account_type: null,
bank_name: null,
debit_day: null
},
fitment: {
date: null,
...
- 101
1
vote
1
answer
82
views
Jupyter Notebook - underscore.js doesn't seem to be accessible anymore
I'm using a custom widget in Jupyter. After upgrading to a new machine it stopped functioning. Checking the javascript console in the browser window running the notebook I see the error ReferenceError:...
- 893
0
votes
0
answers
49
views
The debounce method from underscore library isn't working as expected, how do I create a function that can only be called once a second? [duplicate]
I am trying to understand how debounce works, but it does not seem to do what I think it would do.
Here is an example
const fn = _.debounce(
() => {
document.getElementById("result")....
- 1,603
1
vote
2
answers
137
views
Remove key value pair from an object in javascript using underscoreJs
I have an array
var data = {email: '[email protected]', phone: '3434344332', firstName: 'john', lastName: 'Doe'};
How do i remove one or more elements from the array?
I Tried _.without( data, data....
- 73
1
vote
1
answer
48
views
Lodash remove object by inner object elements condition
I need to remove some objects.
My main object is:
[
{
objectName: {...somefields}
list: [
{
pr: {id: 'someid1',
l: [
...
- 423
0
votes
4
answers
202
views
How to get an object containing the sum of all items in an arrays of objects?
I have an array of objects where each index is one week where I bought groceries. Meaning that array[0] is the first week, array[1] is the second and the so on. What I need to do is do sum all the ...
- 3
0
votes
1
answer
134
views
Confused about _.memoize() implementation
I'm learning different implementations of the memoize function, and something is confusing me. Here is one version of the code:
_.memoize = function(func) {
let cache = {};
return function() {...
2
votes
1
answer
747
views
Confused about lodash merge in this case
I understand how a simple lodash merge works but as I was playing around with it to try more complicated scenarios I got confused about how the output is being formed for instance:
const a = [{ h: 1, ...
- 2,097
1
vote
1
answer
109
views
View not initializing in Backbone.js
Ive created a simple backbone app that gets data from MySQL database about users to display in a view called LeaderBoardView.
Below is the HTML code for the view,
<body>
<div id="...
0
votes
1
answer
63
views
How can i remove the object in the array if 2 properties of array objects are equal? [duplicate]
I have a situation where i need to find the duplicate element in array of object. Object contains 4 properties
{
id:"1",
userName:"userName",
name:"name1",
address:"...
1
vote
2
answers
59
views
How to pass an ajax result to a Public veriable in the same class?
I have a jQuery file which also uses unserscore.js. It controls the selections of dates and different venues. For one of the pages it also controls which visuals are displayed depending on the type of ...
- 79
1
vote
3
answers
152
views
how to use underscore .reduce to return and object that counts properties
considering
var desserts = [
{
name: 'Chocolate Cake',
ingredients: ['cocoa', 'flour', 'sugar', 'eggs', 'milk', 'butter' ],
type: 'cake'
},
{
name: 'Snickerdoodles',
...
- 55
4
votes
4
answers
7k
views
How to use .map to add a new property to an array of objects
trying to use underscore.map to iterate over array of objects and add a boolean property to each object based on if the object value passes a truth statement.
var desserts = [
{
name: 'Chocolate ...
- 55
1
vote
2
answers
544
views
how to resolve not found type declarations error while using Underscore with typescript
I try to use the modular import from the underscore in a typescript app like this:
import map from 'underscore/modules/map'
It works and does the job, but cause the below error:
Cannot find module '...
- 794
0
votes
3
answers
42
views
How to reassign values in a js object based on the values present in an object within the same object?
I have an array of objects in the following form-
let result = [
{
a: 1,
b: 2,
c: 3,
newValues: {
a: 10,
b: 20,
c: 30
}
...
- 41
0
votes
2
answers
158
views
Return an array with the result of calling a method from underscore
I'm trying to recreate the functionality of the underscore _.invoke for learning purposes and I would like to really understand how it works as it seems to be something not too complicated.
The ...
- 47
-2
votes
1
answer
650
views
underscore__WEBPACK_IMPORTED_MODULE_3__ is not a function
I am stuck with issue. Has anyone encountered this. As I am unable to get it what it is asking for.
This is how I imported this library highlighted in yellow.
This how it is showing in browser error.
- 1,164
0
votes
3
answers
57
views
Return all values of nested arrays using string identifier
Given an object searchable, is there a simple way of returning all the id values using lodash or underscore.js (or equivalent) where I can define the path to id?
const searchable = {
things: [
...
- 2,031
-1
votes
2
answers
64
views
Move field names in object containing _ (underscore) to as a nested property after splitting the field name by _
i have an object
{
"name" : "foo",
"tag_name" : "grocery",
"tag_id" : "id",
"tag_nested_id" : "123",
}
I want ...
- 3
0
votes
1
answer
296
views
Cannot pass arguments in the invoke function I recreated
I am trying to recreate .invoke() function.
I am able to call the function, but struggling with passing the arguments. I tried using call and apply, but couldn't make it work.
Here is my code:
_....
- 21
0
votes
2
answers
235
views
is there a function to do this
I'm looking for a way to get the same functionality of the Lodash _.forIn() Method but without using Lodash. I can use Underscore however.
This is what the method does
https://www.geeksforgeeks.org/...
- 7
-1
votes
1
answer
115
views
I was try to solve Python program to create Fibonacci series using Lambda, but I unable to solve it
So on internet they solve using:
from functools import reduce
fib = lambda n: reduce(lambda x, _: x+[x[-1]+x[-2]],range(n-2), [0, 1])
print(fib(5))
Fibonacci program
I don't understand what's the ...
- 3
1
vote
3
answers
108
views
How to count the no of occurences of a certain key in an array of object & append the count to each key's value
How to count the no of occurences of the 'value' key in a object inside an array & append the count to each value if any.
Here 'a' is the source data
var a = [
{ id: 1, value: "10000"...
- 13
1
vote
1
answer
643
views
Security issues in neb and underscore
this is my first question and I hope I am not coming up with something totally stupid.
I am new to JS and Node.js. I can solve easy issues on my own, but with this pollution report I need some advice.
...
- 11
0
votes
1
answer
38
views
Create concatenated array based on property in an array of objects using lodash [duplicate]
I have some data that is an array of objects like so:
let employees =
[
{
emp_id: "1",
course_data : [
{
info: "info",
...
- 359
1
vote
2
answers
654
views
Underscore's debounce seemingly not taking effect with function calling an async function
I have some ionic segment buttons that essentially act as toggle switches. I'm trying to limit the rate at which the effects of the toggles can be switched/selected) and have tried Debounce & ...
- 3,200
1
vote
1
answer
191
views
Underscore.js template variable name is being escaped causing it to not get rendered
I am playing around with rendering templates using with Underscore.js (Backbone.js app). I'm running into the following issue, where a part of the variable name in the template I am trying to render ...
- 31
2
votes
3
answers
4k
views
Search a deeply nested array to update an object
I have a deeply nested data structure and I am interested in matching a certain value inside my array (and array of arrays) and then pushing some data inside an accompanying array. For example ...
- 63
0
votes
1
answer
202
views
Apify do not push items in map function
I have this function that call a new one with _.map function that cycle each element or array
an than it could push items in Apify Storage, but the element of dataset is ever 0.
Why?
const Apify = ...
- 455
3
votes
1
answer
5k
views
SyntaxError: Unexpected token 'export' Underscore.js
I'm getting this error when I copy-paste the underscore.js to my console. Error screenshot "Uncaught SyntaxError; Unexpected token 'export'"
I tried on both Chrome Version 100.0.4896.127 and ...
1
vote
2
answers
250
views
Uncertain behaviour of _.get
let a = {
b : null
}
_.get(a, 'b',''); //return null
but
_.get (a, null, '') //return ''
Is null a falsy value for _.get()?
let a = {
b : {c:{
}
} //basically a nested object
I'm trying to ...
- 23
1
vote
1
answer
346
views
Underscore "defaults" from scratch
I've been trying to rewrite the _.defaults method from underscore.js and I keep getting this error:
should copy source properties to undefined properties in the destination object‣
AssertionError: ...
- 21
1
vote
1
answer
159
views
group by in array using nested array's object field value javascript
I have an array like this
data = [
{ name : "sa", attributes : [{skin : "green"},{nose:"good"}]},
{ name : "sa", attributes : [{skin : "red"},{...
- 15.8k