Can you extend ArrayList in Java?
You can extend any class that is not final in Java. Having said that, you should avoid inheritance if there is no true is-a relationship. Consider composition for reuse. Read about Liskov substitution principle
You can extend any class that is not final in Java. Having said that, you should avoid inheritance if there is no true is-a relationship. Consider composition for reuse. Read about Liskov substitution principle
Try following: (function() { var exLog = console.log; console.log = function(msg) { exLog.apply(this, arguments); alert(msg); } })()
Extend is a method of list, which modifies it but doesn’t return self (returning None instead). If you need the modified value as the expression value, use +, as in [2]+[].
Sure… Just save a reference to the existing function, and call it: (function($) { // maintain a reference to the existing function var oldcss = $.fn.css; // …before overwriting the jQuery extension point $.fn.css = function() { // original behavior – use function.apply to preserve context var ret = oldcss.apply(this, arguments); // stuff I will … Read more
It’s already been ported. node-extend Note the project doesn’t have tests and doesn’t have much popularity, so use at your own risk. As mentioned you probably don’t need deep copies. Try to change your data structures so you only need shallow copies. Few months later I wrote a smaller module instead, recommend you use xtend. … Read more
ES6 class SubArray extends Array { last() { return this[this.length – 1]; } } var sub = new SubArray(1, 2, 3); sub // [1, 2, 3] sub instanceof SubArray; // true sub instanceof Array; // true Using __proto__ (old answer, not recommended, may cause performance issues) function SubArray() { var arr = [ ]; arr.push.apply(arr, … Read more
I found this solution and this works very fine for me. originally from here /** * @typedef {Object} ChildType * @property {String} childProp * * @typedef {Base & ChildType} Child */
angular.extend and jQuery.extend are very similar. They both do a shallow property copy from one or more source objects to a destination object. So for instance: var src = {foo: “bar”, baz: {}}; var dst = {}; whatever.extend(dst, src); console.log(dst.foo); // “bar” console.log(dst.baz === src.baz); // “true”, it’s a shallow copy, both // point to … Read more
Could it be this, what you want to have: # Initial list: myList <- list() # Now the new experiments for(i in 1:3){ myList[[length(myList)+1]] <- list(sample(1:3)) } myList