How to select all the numbers from the below string? str = “1,2, 4,5 ,6 7 8 9 10, 11, 13” I tried using split(‘,’) but it doesn’t work for spaces. As it contains spaces as well. Answer Just make a regular expression and match on numbers
Tag: arrays
Take array Index values in onClick event
how to write an onClick event in my react app to take array index in this code? I just want to get array index as a output This is my array in JSON file. This is my array import ) This is the women array output } Women tab output Currently I get output like this. Women tab expect output
How to add an event listener to all items in array
so this is noobie .. but i am trying to complete a challenge with more due diligence than just downloading the answer, my current html code is: my javascript codes : essentially, the current code is running the event listener for the first and last item of the array only, trying to add it to all 6 but am stuc…
How to pass in a string as a single value and not a split value
I have a function called onClick of a div that calls a dispatch function, and passes in the target value into it (i.e e.target.value). The value being passed in, is being stored in an array. However, I noticed something weird going on. In the array the value is being passed into, the first value is stored wro…
Javascript – push String to Array returns Integer
I add some strings in an array. Why I receive number 2 in the second log when name is a String too? I tried also let arr2 = arr1.slice().push(name); without success. Answer arr.push() modifies the arr itself and returns the length of the resulting array, to do what you want to do, you can do one of the two fo…
question regarding max value in an array with recursion in JavaScript
Currently, I was able to get the following function to retreive the max value from an array through recursion However, when I try to refactor it with an extra parameter “b” through destructuring, the whole function just won’t work properly anymore. Can someone kindly explain what I am doing …
How to create multiple array of objects from single array of objects based on property value
If I have array of objects like this one I want to group it by property value How to create three new separate arrays of objects based on fieldname ( or single array that contains those arrays of objects ) something like this Answer you can first unique the array and next push them to groupedArray like this:
Can I update an array of objects by modifiying a value return by array.find()?
I want to modify an object in an array by calling array.find() and then mutate the returned reference to indirectly mutate the array but that doesnt appear to work. I assumed from reading other articles that array.find() returns a reference to an object in the array on a successful match but that appears not …
How to group nested array of objects in js
I have a nested array of objects. I’m trying to group product objects that have the same value. Each objects has a vendor property containing an email. I am trying to group the objects by matching vendor email This is how my database looks like: I am trying to do it with the reduce method but the proble…
separate json object into different index
I have following array which consist of json objects: I want to separate the array index for each same id as an example : How to do like that ? thanks Answer you can use reduce to group by id and then the values of the resultant using Object.values EDIT ??= is the Logical nullish assignment. The right hand si…