I want to create a dynamic hierarchy based on my groups and rollup sum to top level, also if I am providing a large amount of data browser is getting hang. I have the below data: I have created below function but its not working properly Required below sample result (I haven’t included other country but I need all) Answer
Tag: ecmascript-6
PouchDB – Call get() in function ( TypeError: cb is not a function )
I am trying to make a simple login system using PouchDB, but I have a problem when I want to call db.get() in my function logIn() In the console I get Uncaught (in promise) TypeError: cb is not a function is there a better option for this? Answer The error Uncaught (in promise) TypeError: cb is not a function Is
Creating an array by nested map with filtering
I have data like above, I want to make list of properties which has isMain property is true like the example below. How can I best do this with ES6? expectation ==> Answer You need to flat the array and then use the filter method to get your desired items from nested array, this will work even if you have
Javascript ES6 Syntax Radio button check
I have been trying to convert my code using the ES6 syntax and wondering why are my form’s radio and checked buttons not registering as true when check. I still get the error message even if a user selects one of the choices? Could you please help me with what I’m doing wrong so I can better understand. Answer Cycle
Disabled When Lacking Input in Field in React
I have set of inputs that needs to be filled out completely. I should disable the submit button when its not complete. Its working fine until I decided to erase and fill it out again. It never disables. What would be the proper and correct way to do this? Is there a better way to do this? CLICK HERE Answer
What’s the best way to re-run a const-declared function?
New to ES6 here. I have a function declared “inside” a constant: I need to re-run this periodically. What’s the best way to do it? Simply calling requestData() is throwing ‘Type Error’ messages. Thanks! Answer The second argument to https.request is a function reference that is called with a single parameter, the result of the request. If the function is
ES6 reduce array without typescript error
i want to remove the first array element, without modified the original (immutable), something like this: the code works, but the typescript check complained: Is there the elegant/better way to do somilar to getAnother()? Answer You can ignore an element with a comma. Array#slice can also be used in this case.
Function variable value resetting after calling this.setState
I am relatively new to the JavaScript world, i am learning react and have encountered a weird issue see this code here i am concerned with the newPrice variable which is used update the state when more items are added, which works fine problem is after the this.setState return the newPrice gets retested to 0 again so i can’t use
convert/rename keys in object?
I have an object looking like: I would like to rename all keys to be I’ve come up with this so far, which fails, likely because it’s not valid 🙂 So how do i rename the key and assign the correct value? Answer You can reduce over the Object.entries to create a new object (not an array which is what
Access values from keys in typescript
In my typescript application, I have the config.json in the following format: Now, in my .ts file, I want to read these key value pairs, and I am using the following code: I am trying to compare the values in ‘if’ statement, using the following ‘eventfilters[i][keys[j]]’. However, its throwing the following error ‘Type ‘Object’ cannot be used as an index