I have an array for example arr = [1,3,2,10,4,6,8] I want to extract the list of ordered numbers in that array so the result of my example is S = [[1,3],[2,10],[4,6,8]] another example arr = [13,89,81,17,7,27,5] the result has to be S = [[13,89],[81],[17],[7,27],[5]] Answer You can keep track of the previous …
Tag: arrays
Map + filter – Showing people that have < 18 years and abbreviate names
I wanted to be able to transform the age into a single array, so I would already know how to filter, then apply the mapping to only show people over 18 years old, in addition, to present the abbreviated names of the people. Here what i tried to do: Answer If I’m understanding correctly the desired outco…
How sum specific array values with input onChange
I’m have a list of objects I need to sum two values in array with onChange input On every change values is summed I’m create input form and it’s works but change all my mapped values at once How can i change only one item in array at once on every onChange event? Answer You can make inputVal…
How Do I Programmatically Change The SRC value of the images using JavaScript
The images do not have unique ids nor do they have unique classes. How do I change the src value for each element from the array of images. Answer The second argument of forEach is the index of the current iterated item. Grab the image elements with querySelectorAll, and then use forEach to iterate over them …
How can I implement a table with nested dropdown items?
I’m trying to make a table like this: Table elements can contain thousands of child dropdown elements. I am writing code in React and so far I have no idea and have not figured out how it can be done in a more optimized way. Right now I am trying to work with a data structure like this Current implement…
How do I updated an object’s value inside an array through user input?
How do I implement/execute where once I click the edit button it will allow the user to input a value then once submitted, the text in the li will render the updated value? JS code block is written below: P.S. You can ignore the other functions that are irrelevant. P.S. I know, the edittask is incomplete but …
Convert contents of object to one entry in array
I have an object and I would like to convert the contents of the object as a string to first array element value , key of the array will be 0 example: I have I would like to see the result as : Answer You can use the JSON.stringify method:
How to return specified data in function? JavaScript
I have the following data structure in an array from Neo4j. I am trying to loop over the array, add specific data to a new array (finalList), and return the new array with this code. Every time I run the code, finalList is returned empty. How can I add the appropriate data to an array and have it returned ins…
How to fetch data properly for this API? (array)
console.log screenshot Hi, I am using “fetch” method with API for my website, and this API shows book information, if books include the input title. Screenshot attached is console.log result when typing an example book title. I’d like to get every title info of each array, could anyone can h…
Finding data from one array by looping another array (MongoDB, Javascript)
I have 2 arrays. I want to get an array of objects with same id. Like when I go get all the object of 1 then I will loop through array2 and get the object then put them in a 3rd array. I’m stuck at this point. Update: Thanks to flyingfox for solving my issue. But I see that if