Can I avoid declaring a useless variable when array destructuring when I am only interested in array values beyond index 0? In the following, I want to avoid declaring a, I am only interested in index 1 and beyond. Answer Can I avoid declaring a useless variable when array destructuring when I am only interes…
Tag: arrays
How can I update an array based on another array on matching index?
I have the following two object arrays. I would like to update array1 elements to reflect array2 elements where the transid matches. So my result should be either a new array that has the two elements from array1 updated to reflect the values in array2, or the same array1 with the updated values. What is the …
How to use filter to search in multiple key values of objects in an array?
I have an array of wines containing objects with data for each wine: I can figure out how to search — case insensitive — for a wine object, while specifying which key of the object to search in, like this: Returns: However, if var search = ‘Winery 3’ or var search = ‘red’ t…
Get size of array returned by map in React render
I’m using array.map in my render method of a React component. It works but I want to know how many rows it’s rendering. I’m trying by initialising this.numRows = 0 in my constructor, then incrementing it in the map callback: But this is still showing zero. Full code here: jsfiddle.net/ra13jx…
Merge arrays from object property in an object array [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 5 years ago. Improve this question Give an array of objects as below: I would like to get an array of me…
Get all array elements except for first and last
I have an array of locations, I need to be able to access origin, middlepoints and destination separately. I know that my origin is always the first element and the destination is always the last element but I can’t figure out how can I dynamically can access all the middlepoints? Answer To achieve this…
How to pass an array from view to controller? Using Laravel
I’m with an issue for some days that I can’t solve. I should have a javascript/ajax/jQuery function in my View that creates an array and send the user to a new page using the Route “/modulos/contas_ti/gerar_protocolo” Here is my javascript: My Route: My Controller: Answer You can send …
Get last value from an array using Google Apps Script
I need to get last value from an array and I keep getting this error when I use slice TypeError: Cannot find function slice in object Sun Jul 23 2017 00:00:00 GMT+0100 (BST). (line 15, file If I use length -1 I get NaN. This is the code I am using it. … and this is the table full table
Basic Profile Lookup always returning no contact found
So I’ve recently begun learning Javascript using the tutorials on freecodecamp and there’s this challenge I’ve been stuck on for a few hours now. The function always returns ‘No contact found’ and I don’t understand why. If someone were to explain it to me and correct my co…
How to check if an Array is an Array of empty Arrays in Javascript
In my node.js 6.10 app, I am trying to identify in my array looks like this: This nesting can go onto n level, and can have elements in arrays at any level. How can I do this? Thanks P.S. I know I can do it using a n level for loop, but was wondering about a more optimized solution. Answer