I’m looking for sorted container for JavaScript. I’m using C++ std::set, https://en.cppreference.com/w/cpp/container/set and try porting my code to JavaScript. JavaScript Map is not ordered container. I need some ordered container. I don’t need completely compatible container of std::set on C++. My requirements are Custom comparator support Automatically sorted Find the specific value. If value is not found, get the next
Tag: collections
How can I count in Firebase the collections in a document
I know how to count how many Documents are in a collection in Firebase but how does it work the other way around. I have several collections in a document and I need to find out how many. (In my example it would be 2) My Setup: I tried the following but it does not work: Does anybody know how
What is the best way to reduce and merge a collection of objects
So I reached a dilemma this week while trying to solve what seemed to be an easy problem, but I was wrong. Sample code: So the problem was being able to map through the array and merge/sum the values if their unique identifiers match. Any suggestions? End result would look something like this: Now of course the real application will
How to use Meteor.users.update to inc a variable in a case specific object?
I need to inc a variable within the case specific object in an array in the profile object in the users object/mongo collection. The case specific object’s name will equal a local variable, and the I want to inc the variable num by 1. What would the syntext for this look like? Answer I don’t know exactly what your model
Get first element of a collection that matches iterator function
I would like to achieve something like _.first with _.filter, that is, having a collection of elements, I’d like to get the first one (if exists) that matches a truth test (iterator). For example, given an array like the following: I would like to getthe first (and only first) element that matches my custom function: So far: Is there a