Hello I am new to the JavaScript language. I have a table1.data property that’s an array of objects with data about a school like: Can I perhaps get an array of the telephone values from all the objects using JS? Please help. Answer All you need to do it traverse the items in the data, while grabbing the telephone field
Tag: object
Comparing two nested arrays of objects, and exclude the elements who match values by “id” into new array in JS
I have two arrays of objects, i need to match arr2 names to arr1 by matching id’s Answer You could create a Map from arr2, keyed by id and with as value the corresponding object. Then map arr1, looking up the object in the Map, both for the object itself and the children:
How do I get the index of two variables, compare them, and return true or false
I am making a trivia game that uses an array of objects. I think the correct way is to get the index of the correct answer by using .find, getting the the index of the selected answer, then use an if statement to compare the two. If they match then the console will log “correct” or “incorrect” otherwise. I am
Get a specific object from an array of objects [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed last month. Improve this question Here is the sample input How to get an output that would be like Thank you in advance Answer You could use .reduce() like so:
Looping through and reducing nested array
I can’t seem to get my head around the array.reduce() function. I’ve got the following array: and I’m trying to get a result like below. I’m not sure how to go about multiplying the ingredient amounts with the item quantities: I’ve tried following the structure that was given here but the arrow function is throwing me off. Any sort of
Merge 2 arrays of object based on specific object key
I have 2 arrays which is contains same id with different value (inside selected) My goal is to merge both become 1 array. When I use spread operator like this: It comes the data being override First array Second array How can I make both of arrays become 1 ? the expected result: What am I doing wrong in the
how do I return the whole object without seeing [object Object]?
This code updates the object properties and their values but when I try to return the object, I get [object Object] on my screen. How do I Return the whole object? Answer You have to create a string at some point. JSON.stringify(records) is the closest you will get to printing the object.
JavaScript rendering object containing arrays as table
I have an object (equipmentTable) containing arrays of values for each column in a table. I am having trouble getting this table to render properly. I think I am pretty close. Here is the object: And what I have tried: No matter what I try, everything renders in the first column. Any help is appreciated! Answer It’s a little unclear
how javascript handles variables in objects?
I have a question about declaring a variable in an object. Assuming that global or window is also an object, why is it not possible to declare a variable using let in an object that is a child of the window object? I do not understand that. Thanks for the answer and sorry for the English but I hope you
How to append a property to another property of type object in JavaScript
I am trying to figure out how to append a new value to the same property of an object. I have this code below: The value [member.displayName] changes every for loop, and I want every loop to create a new value within [todaysDate] with [member.displayName] property name. It currently replaces property names with the next name from the row, instead