considering I am trying to use underscore reduce to output and object that counts how many of each type there are Here is what I have so far I believe I am using reduce incorrectly here or it may be my logic. I am trying to follow the template from underscore. Answer Your issue, I think, is that you are
Tag: underscore.js
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 What i want to achieve is as following Answer
Finding out number of occurence of a key in a nested JS object
I have a nested object like Now I want to get the level of the master parent object or basically how many times a parent object has been nested. In this case, I should be getting an output of 3. Answer You could also do it recursively like this:
How can I make Underscore behave like Ramda?
Two days ago, I announced a preview release of Underscore that integrates with the new Node.js way of natively supporting ES modules.1 Yesterday, somebody responded on Twitter with the following question: Can you do Ramda-style data last functions? He or she was referring to one of the main differences betwee…
Filter Object Array 1 on the basis on 2nd Object Array in Javascript(UnderscoreJS)
I wanted to filter Object Array 1 if it’s object value not exist in 2nd object Array. Non-Intersected values from 2nd array But the result is using this code is wrong. please help me here Answer Here is a solution based on underscore. b.id !== a.group -> a.id !== b.group to match your objects’ …
Updating nested object by path in javascript
Let’s say I have this object: I’d like to be able to update the price in this object through a function call as follows: This answer Javascript: how to dynamically create nested objects using object names given by an array is good but does not address the case when there are arrays in the object. …
Remove empty objects from an object
I am trying to remove empty objects inside an object, here is an example with the expected output: I tried using some examples from other StackOverflow questions, however those are just for one level objects. Answer Basic function that removes empty objects First start with a function that only works with a s…
Add property to an array of objects
I have an array of objects as shown below I want to add one more property named Active to each element of this array of Objects. The final outcome should be as follows. Can someone please let me know how to achieve this. Answer You can use the forEach method to execute a provided function once for each elemen…
_.chain – underscore JS
This code works fine Is it possible to use the _.chain() function to clean this code up? I’ve tried to code below, but it gives a Type error. Answer You just need to remove the first argument (arr) from each of the functions you have inside the _.chain() and _.value() (as they are now gather from the ch…
Update if exists or add new element to array of objects – elegant way in javascript + lodash
So I have an array of objects like that: uid is unique id of the object in this array. I’m searching for the elegant way to modify the object if we have the object with the given uid, or add a new element, if the presented uid doesn’t exist in the array. I imagine the function to be behave like