Use the second parameter forEach accepts instead, which will be the current index you’re iterating over: n = [1,2,3,5,7,8,9,11,12,13,14,16,17,18,20,21,22]; n.forEach((element, index) => { console.log(element, index); }); If you have two separate arrays to begin with, in each iteration, access the [index] property of the other array: var n = [1, 2, 3, 5, 7, 8, … Read more
Imagine that you’re the head chef for a restaurant, and you’re all preparing a huge omelette for a buffet. You hand a carton of a dozen eggs to each of two of the kitchen staff, and tell them to get cracking, literally. The first one sets up a bowl, opens the crate, grabs each egg … Read more
TL;DR Your best bets are usually a for-of loop (ES2015+ only; spec | MDN) – simple and async-friendly for (const element of theArray) { // …use `element`… } forEach (ES5+ only; spec | MDN) (or its relatives some and such) – not async-friendly (but see details) theArray.forEach(element => { // …use `element`… }); a simple … Read more
The loop is equivalent to: for(int j = 0; j < number.length; j++) { int i = number[j]; … } where j is an internally generated reference that does not conflict with normal user identifiers.
foreach($images as $key => $image) { if(in_array($image, array( ‘http://i27.tinypic.com/29ykt1f.gif’, ‘http://img3.abload.de/img/10nxjl0fhco.gif’, ‘http://i42.tinypic.com/9pp2tx.gif’, )) { unset($images[$key]); } }
You can use itertools.product: >>> for x,y,z in itertools.product(range(2), range(2), range(3)): … print x,y,z … 0 0 0 0 0 1 0 0 2 0 1 0 0 1 1 0 1 2 1 0 0 1 0 1 1 0 2 1 1 0 1 1 1 1 1 2
The for…in statement is meant to be used to iterate over object properties, by looking your code seems that actors is an Array (you are setting the initial element with index 0). This statement will also crawl up the prototype chain, if you have extended the Array.prototype those properties will be iterated, and also the … Read more
The doParallel package will auto-export variables to the workers that are referenced in the foreach loop. If you don’t want it to do that, you can use the foreach “.noexport” option to prevent it from auto-exporting particular variables. But if I understand you correctly, your problem is that R is subsequently duplicating some of those … Read more
This is a good question and I would be happy to see some in-depth answer. However, the official documentation says: These shortcomings were known by the designers, who made a conscious decision to go with a clean, simple construct that would cover the great majority of cases. The great majority of cases is the answer … Read more
You have the afterRender callback in knockout.js: foreach: { data: myItems, afterRender: renderedHandler } Here’s documentation. Inside your handler check whether the length of the rendered collection is equal to the length of the items collection. If not don’t execute the full rendered logic that you intend to use. renderedHandler: function (elements, data) { if … Read more