document.getElementById() only supports one name at a time and only returns a single node not an array of nodes. You have several different options: You could implement your own function that takes multiple ids and returns multiple elements. You could use document.querySelectorAll() that allows you to specify multiple ids in a CSS selector string . … Read more
It’s actually very similar to jQuery: document.getElementsByClassName(‘class1 class2’) MDN Doc getElementsByClassName
Using linq: YourList.OrderBy(x => rnd.Next()).Take(5)
max(alkaline_earth_values, key=lambda x: x[1]) The reason this works is because the key argument of the max function specifies a function that is called when max wants to know the value by which the maximum element will be searched. max will call that function for each element in the sequence. And lambda x: x[1] creates a … Read more
It seems some people are landing here, and simply want to know if an element exists (a little bit different to the original question). That’s as simple as using any of the browser’s selecting method, and checking it for a truthy value (generally). For example, if my element had an id of “find-me”, I could … Read more
Use Collection#retainAll(). listA.retainAll(listB); // listA now contains only the elements which are also contained in listB. If you want to avoid that changes are being affected in listA, then you need to create a new one. List<Integer> common = new ArrayList<Integer>(listA); common.retainAll(listB); // common now contains only the elements which are contained in listA and … Read more
You could use commons lang’s ArrayUtils. array = ArrayUtils.removeElement(array, element) commons.apache.org library:Javadocs
You can use operator.itemgetter: from operator import itemgetter a = [-2, 1, 5, 3, 8, 5, 6] b = [1, 2, 5] print(itemgetter(*b)(a)) # Result: (1, 5, 5) Or you can use numpy: import numpy as np a = np.array([-2, 1, 5, 3, 8, 5, 6]) b = [1, 2, 5] print(list(a[b])) # Result: [1, … Read more
How to get the current script element: 1. Use document.currentScript document.currentScript will return the <script> element whose script is currently being processed. <script> var me = document.currentScript; </script> Benefits Simple and explicit. Reliable. Don’t need to modify the script tag Works with asynchronous scripts (defer & async) Works with scripts inserted dynamically Problems Will not … Read more
delete will delete the object property, but will not reindex the array or update its length. This makes it appears as if it is undefined: > myArray = [‘a’, ‘b’, ‘c’, ‘d’] [“a”, “b”, “c”, “d”] > delete myArray[0] true > myArray[0] undefined Note that it is not in fact set to the value undefined, … Read more