Element on the loop

The reflector is mounted at a distance of 3.5-4" aft of the loop elements. The long 26" reflector elements should be centered behind each loop and run horizontally. A reflector could consist of only two 26" reflector rods.Two half-wavelength rods behind the top and bottom ends of the loops give some additional gain. Many materials and ...

Explanation : for i in list1 [1:]: When you use [1:] in for loop list it skips the first element and start loop from second element to last element. - Neeraj Sharma. Sep 23, 2015 at 6:22. 2. This solution is not correct, it does not skip element, but makes a copy without first element. Probably not what user wants to do.Oct 9, 2021 · 1.First check whether element (trash icon ) exists,the result of this activity is a boolean lets say bElementExists. 2.Then use Use a While loop and - Condition bLoopElmExist - Place a click activity and - Element Exits element activity to find the icon ,outcome is a boolean say bLoopElmExist(Same boolean used in the activity above while loop can May 14, 2014 · In the first case, you wait until the second loop iteration to remove 2 from the list, and the next iteration finds the end of the list and exits. In the second case, you remove the 1 from the list during the first iteration, and the next iteration throws the exception when it tries to retrieve the next element. 2. Hi just add a variable counter which would be incremented at each click and when then counter is equal to the number max of div It come back to 1. like that. <script>. var button = document.querySelector('#click').addEventListener('click', onClick); var allDiv= document.querySelectorAll('.test'); var count=0;I would like to know how to loop through things in Selenium. Basically, I just want to make a for-loop to find all the "panel titles" that have earlier than a certain time and then an if statement that says if it has 4 golfers then I will click the book button. I'm just not sure how you iterate through the xpaths to these things in HTML.The IN_FID then gets added to a list. If the values in NEAR_FID have been seen before during this process then the IN_FID does not get added to the list. I know I havent included it in the code but ideally I would also like to loop through the IN_FID values at random instead of sequentially. What am I doing wrong in this code?Basic List Iteration; Looping with a Condition; Modifying List Elements; User Input in Loop; Basic List Iteration. In this example, we initialize an index variable to 0 and use a while loop to iterate through the list until the index exceeds the length of the list. The value at the current index is printed, and the index is incremented in each iteration

5. Array.prototype.some() Method. The Array.prototype.some() method works much like the forEach() method with one caveat: your callback function for each loop needs to return true or false.Why ...First, you must add a new Loop Item template to create a dynamic image carousel. On your WordPress dashboard, navigate to the Templates -> Theme Builder. Once you enter the Elementor Theme Builder screen, click the Loop Item menu to add a new template, and it will bring you to the Elementor template editor. Setting the Template Preview.Use the documentation to help you! document.getElementsByClassName: var elements = document.getElementsByClassName(names) elements is a live HTMLCollection of found elements. The first thing you should notice on the HTMLCollection documentation is that it does not have a method named forEach. But it does have a property named length.We are excited to join forces with the team at Element and are looking forward to providing our customers with superior short- and long-read sequencing products," said Tuval Ben-Yehezkel. Element's inaugural virtual event on March 14, 2022, will provide more details on the Loop Genomics technology and its integration with the Element platform.The foreach command implements a loop where the loop variable (s) take on values from one or more lists. In the simplest case there is one loop variable, varname , and one list, list, that is a list of values to assign to varname . The body argument is a Tcl script. For each element of list (in order from first to last), foreach assigns the ...With the close of the deal, Tuval Ben-Yehezkel, Ph.D., the CEO and founder of Loop, has been named senior director of applications on Element's leadership team. "Loop Genomics has successfully ...

Some of ways below for different circumstances. In most normal cases, the simplest way to access the first element is by. yourArray[0] but this requires you to check if [0] actually exists. Another commonly used method is shift () but you should avoid using this for the purpose of accessing the first element.Below is the basic syntax of the forEach loop in TypeScript. 1. array.forEach(callback[, thisObject]) Callback function: This is the function that operates on each array element. thisObject: Used to reference the current state of the array element. Note: There is no return value in the forEach loop. The function alters the original array …We use cookies to give users the best content and online experience. By clicking "Accept All Cookies", you agree to allow us to use all cookies.Hi @UipathNewbie, Use Find Children Activity to the all the element. Use For Loop to loop through the all the elements. inside the loop using click activity click the elements. it will navigate to detail information and using screen scarping/Extract Structured data extract all the information's and click button. Loop will continue.Step 2: Design the Loop Template. Next, we're going to design the Loop template. On your WordPress dashboard, navigate to Templates -> Theme Builder. Once you enter the Theme Builder screen, click the Loop Item menu to add a new template. Alright, we will start everything from scratch, so go directly to the Elementor template editor.

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Next, I used the for loop to iterate over all the elements until the end of the myNums array. I also reassigned the value of the sum variable using the addition assignment operator by adding its current value and the current array element. To learn more about the for loop in JavaScript, give this article a read.1. For people who came here wanting to walk through a list with very long steps and don't want to use lots of memory upfront, you can just do this. Python 2.7: import itertools. def step_indices(length, step): from_indices = xrange(0, length, step) to_indices = itertools.chain(xrange(step, length, step), [None]) for i, j in itertools.izip(from ...The loop will produce the following output: Element: Hydrogen Element: Helium Element: Lithium Element: Beryllium Loop over a range #. You can use the sequence expression to specify a range of numbers or characters by defining the start and the end point of the range. The sequence expression takes the following form:Copy. for variable = expression. then variable is set to each column of the expression in turn. for variable = a:b creates a row vector a:b and the columns of the row vector are the individual values, a, a+1, a+2... b. By you have x31 = x30 (:) which is a column vector, so the first column if it is the entire vector.Processing arrays with for-loops.The patterns found in the examples suggest three common programming practices: . Typically, there is one for loop for each array dimension. C++ arrays are zero indexed, so programmers start the for-loop control variable at 0 and use a strict less-than test in the middle expression, which causes the loop to end after the last element is processed.The problem with the code is it creates an empty list for 'key' each time the for loop runs. You need just one improvement in the code: dict = {} dict[key] = [] for n in n1: if # condition # dict[key].append(value) print dict Share. Improve this answer. Follow ...

A nested for loop allows you to loop through elements in multiple vectors (or multiple dimensions of a matrix) and perform some operations. The basic structure of a for loop in R is: for (i in 1:4) { print (i) } [1] 1 [1] 2 [1] 3 [1] 4. And the basic structure of a nested for loop is:Using a for loop, how can I loop through all except the last item in a list? I would like to loop through a list checking each item against the one following it. Can I do this without using indices? Skip to main content. Stack Overflow. About; ... If you want to get all the elements in the sequence pair wise, use this approach (the pairwise function is from …There are many ways by which the array can be sorted in ascending order, like: Selection Sort. Binary Sort. Merge Sort. Radix Sort. Insertion Sort, etc. In any of these methods, more than 1 loops is used. Can the array the sorted using a single loop? Since all the known sorting methods use more than 1 loop, it is hard to imagine to do the same ...2. std::vector<T> defines T operator[](int). This means you can access a vector x 's element i via x[i]. std::string defines char operator[](int), which returns the char at that position within the string. So if you have an std::vector<std::string> called x, x[i][j] will return the j th character of the string in the i th position of the vector.83. For..in is used to loop through the properties of an object, it looks like you want to loop through an array, which you should use either For Of, forEach or For. console.log(val) you should use const instead of let, i know, it seems odd, but in each iteration the val is constant and limited to the scope between brackets {}.Once the loop is that completed, that is 4th index replaced by 3rd, 3rd replaced by 2nd, 2nd replaced by 1st and 1st replaced by 0th index element. After the loop is complete, your array would look something like this: [1,1,2,3,4] Now 0th index element is replaced with temp, which is the original 4th index of the array.6 days ago · The for each loop (or enhanced for loop) is used for iterating over elements in a collection, such as arrays, lists, or sets. It simplifies the syntax of iterating over collections and does not require explicit indexing. 3. For Loop with Iterator: colors = ["red", "green", "blue"] for color in colors: This method uses a callback function and applies it to each element in the array, meaning we don't need to use a bracket notation to get each element. Break Out of a Loop. So far, we've essentially only highlighted examples in favor of the forEach() method. But one distinct advantage of the for loop is its ability to exit a loop early if necessary.A two-grid decoupled finite element method is proposed and analyzed for the stationary closed-loop geothermal model, which is coupled by the Navier-Stokes/Darcy equations and the heat equations with some interface conditions. The main idea of the proposed method is to solve the nonlinear problem on a coarse grid to obtain an initial approximation, then …else following a for will trigger in case a for loop finishes without hitting a break on the way. Prints: ['well', 'come', 'going', 'other', 'D', 'other ... it's hard to tell if the first word in each key element will be the word in values. This example is too broad so I've taken that into account and updated my answer. category = [] keys ...In particular, removing objects from a list will cause issues (see strange result when removing item from a list ). I would consider making additional lists, one for your results, one temp list for the elements you have left to process. Note that in my example, tmp1 is your input list. tmp1 = [values to process] tmp2 = [] results = [] while(tmp1)With the close of the deal, Tuval Ben-Yehezkel, Ph.D., the CEO and founder of Loop, has been named senior director of applications on Element's leadership team. "Loop Genomics has successfully ...

In the following circuit, use loop rule to determine the potential difference across the element marked. Step 1: Identify the number of loops in the circuit. There is one loop in this circuit. The ...

No, you can't get the iterator in a range-based for loop (without looking up the element in the container, of course). The iterator is defined by the standard as being named __begin but this is for exposition only. If you need the iterator, it is intended that you use the normal for loop. The reason range-based for loop exists is for those cases where you do not need to care about handling the ...Performance-wise conclusions are simple: Go with for loop (forward) and test using !== instead of <. If you don't have to reuse the array later, then while loop on decremented length and destructive shift() -ing array is also efficient. tl;dr. Nowadays (2011.10) below pattern looks to be the fastest one.The outer loop picks all the elements one by one. The inner loop looks for the first smaller element for the element picked by outer loop. If a smaller element is found then that element is printed as next, otherwise, -1 is printed. Below is the implementation: C++ // Simple C++ program to print // next smaller elements in a given array. #include …From your code it appears that, for each item, you are adding to that item everything from its own 'Enumerable' property. This is very simple: foreach (var item in Enumerable) { item = item.AddRange(item.Enumerable)); } As a more general example, let's say we want to iterate a collection and remove items where a certain condition is true.E.g., var formDiv = document.getElementById("formDiv"); and put it before the loop. Then you're not looking for that element for every grade. It doesn't make much difference speed-wise, but maintainability will be better. - Heretic Monkey. Aug 16, 2016 at 21:54. Check out 6502's answer. You need to create a new element every time you want ...Basic List Iteration; Looping with a Condition; Modifying List Elements; User Input in Loop; Basic List Iteration. In this example, we initialize an index variable to 0 and use a while loop to iterate through the list until the index exceeds the length of the list. The value at the current index is printed, and the index is incremented in each iterationIf you really want to use parenthesis to initialize a tuple, add a comma in there like so: a = ("bc",). If there is only one item without a comma, Python returns only the single item, and then the for -loop iterates through each character. I.E a = ("b", "c") returns ('b','c') and a = ("bc") returns bc. Instead, you could use either braces or ...Given an array of integers, find the sum of its elements. Examples: Input : arr [] = {1, 2, 3} Output : 6. Explanation: 1 + 2 + 3 = 6. Input : arr [] = {15, 12, 13, 10} Output : 50. Sum of elements of an array using Recursion: The idea is to use recursive approach which calculates the sum of an array by breaking it down into two cases: the base ...What Is The Loop Builder. Elementor 3.8 Pro has made a significant addition to its platform by introducing the Loop Builder. This new feature empowers users to design the main item for repeating content, such as listings, posts, and products, allowing you to customize their layout on the page. According to third-party experts, creating a main ...Yes, I know, that's not the problem. The interest of the Loop, is when i is egal to 9, I can't do nothing more. But right here, the For loop is already finished, before I click on an element. I would like, when I click on an item of my list, i increment, and when I arrived to 9, the loop stops. -

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So, my problem is that when the condition is false, it does not skip the while loop and go to what's below it. It tries to do this : driver.findElement(By.cssSelector("a[action='cancel']")) which makes the program fail. How do I make it skip it when it's false ands go to what's out of the loop? Thanks.Working. For each iteration, the for -each loop takes each element of the collection and stores it in a loop variable. Thus, it executes the code written in the body of the loop for each element of the array or collection. Most importantly, the traversal happens until the last element of the array or collection. 3.3.Can you show me how to do using conditions, i have few other conditions where i need to use loop. - LUZO. Sep 20, 2018 at 13:18. Added the answer bellow, you can add more conditions in the filter or add another filter call. ... so you cannot add elements to it. If you really need a mutable list, you can use MutableList.Here, we demonstrate that mutation of the GAGA loop to CAGU alters the structure around SL-H, and reduces the interaction of La protein with critical cis acting elements of the IRES RNA. Interestingly, mutation of the loop to GAAA also has similar effect, suggesting the GAGA sequence of the loop, is necessary for the function.Hi my code works My goal is to loop through each element in the table and and click the element so i can go to the next page basically I want to do this . 1 click element form drop down 2 //code some stuff 3 Go back 4 click next element from drop down 5 code some stuff and etcWithout any further delay, let’s get to the main points. Table Of Contents. 1 Using a FOR loop. 2 Using a for-in loop. 3 Using the forEach () method. 4 While loop with index. 5 While loop with iterator. 6 Using the map () method. 7 Conclusion.The elements of both a and a.T get traversed in the same order, namely the order they are stored in memory, whereas the elements of a.T.copy(order='C') get visited in a different order because they have been put into a different memory layout.. Controlling iteration order#. There are times when it is important to visit the elements of an array in a specific order, irrespective of the ...Here are some of the key benefits of using Elementor Loop Builder: Complete design control: You can design every aspect of your loop, from the overall layout to the individual elements. Easy to use: Elementor Loop Builder is a drag-and-drop tool that is easy to use, even for beginners.for loop will stop iterating once all the element in iterator are exhausted. If possible please state your use case for such manual behavior to give clarity. If possible please state your use case for such manual behavior to give clarity. Enter Number 8 : -66.5. Largest element = 55.5. This program takes n number of elements from user and stores it in array arr []. To find the largest element, the first two elements of array are checked and largest of these two element is placed in arr [0]. Then, the first and third elements are checked and largest of these two element is placed ... SAN DIEGO-- ( BUSINESS WIRE )-- Element Biosciences, developer of a new and disruptive DNA sequencing platform, today announced that the company has closed its acquisition of Loop Genomics, a long ...The IN_FID then gets added to a list. If the values in NEAR_FID have been seen before during this process then the IN_FID does not get added to the list. I know I havent included it in the code but ideally I would also like to loop through the IN_FID values at random instead of sequentially. What am I doing wrong in this code? ….

A Super H/Duty 5 Element Delta Loop for 11m Done the right way – not the cheap way! Due to very popular demand, I’m happy to publish the original 11m ‘Vortex’ 5 Element Delta Loop design. Still used by some of the world’s top big-gunners, this antenna will bust pile-ups with ease. It’s big and heavy – so not for inexperienced ...Once the loop is that completed, that is 4th index replaced by 3rd, 3rd replaced by 2nd, 2nd replaced by 1st and 1st replaced by 0th index element. After the loop is complete, your array would look something like this: [1,1,2,3,4] Now 0th index element is replaced with temp, which is the original 4th index of the array.1. The "@ref" refers to the current element that is correct. "@ref" refers to the last element in loop command that is not correct (in my example, the last tr element of the table element). I want that "@ref" refers to per element individually (in my example, per tr element of the table element) not to the last element. <tbody>.The <video> element is a replaced element — its display value is inline by default, but its default width and height in the viewport is defined by the video being embedded. There are no special considerations for styling <video> ; a common strategy is to give it a display value of block to make it easier to position, size, etc., and then ...3 days ago · 1 of 48. Element on the Loop. (520) 214-7556. Overview. Price. Similar Listings. Location. Amenities. Property Details. Explore the Area. Getting Around. FAQs. 7887 East Uhl St • Tucson AZ 85710 • Broadway Pantano East. 200 Units. Cats allowed. Birds allowed. Dogs allowed. Fish allowed. Lizards allowed. Browse Similar Places. Tucson. See all. So, my problem is that when the condition is false, it does not skip the while loop and go to what's below it. It tries to do this : driver.findElement(By.cssSelector("a[action='cancel']")) which makes the program fail. How do I make it skip it when it's false ands go to what's out of the loop? Thanks.DOMNodeInserted is being deprecated, along with the other DOM mutation events, because of performance issues - the recommended approach is to use a MutationObserver to watch the DOM. It's only supported in newer browsers though, so you should fall back onto DOMNodeInserted when MutationObserver isn't available.. let observer = new MutationObserver((mutations) => { mutations.forEach((mutation ...The event loop. JavaScript has a runtime model based on an event loop, which is responsible for executing the code, collecting and processing events, and executing queued sub-tasks. This model is quite different from models in other languages like C and Java.Note that we really want an ordinary for loop here, since we are modifying the container itself. The range-based loop should be strictly reserved for situations where we only care about the elements. The syntax for the RBFL makes this clear by not even exposing the container inside the loop body. Edit. Pre-C++11, you could not erase const ...Read: For loop vs while loop in Python Method-2: Using the range() function. The "range" function in Python can be used to generate a list of indices that correspond to the items in a sequence. This allows us to reference the current index using the loop variable in Python. # This line creates a new list named "my_lis" with the values [6, 1, 9, 2] my_lis = [6, 1, 9, 2] # This line starts a ... Element on the loop, Sep 8, 2023 · range-expression. -. any expression that represents a suitable sequence (either an array or an object for which begin and end member functions or free functions are defined, see below) or a braced-init-list . loop-statement. -. any statement, typically a compound statement, which is the body of the loop. , Learn how to loop through element's data- attributes in JavaScript with helpful answers and examples from Stack Overflow., function. Type: Function ( Integer index, Element element ) A function to execute for each matched element. The .each() method is designed to make DOM looping constructs concise and less error-prone. When called it iterates over the DOM elements that are part of the jQuery object. Each time the callback runs, it is passed the current loop ..., An R-loop is a three-stranded chromatin structure that consists of a displaced single strand of DNA and an RNA:DNA hybrid duplex, which was thought to be a rare by-product of transcription. However, recent genome-wide data have shown that R-loops are widespread and pervasive in a variety of genomes, and a growing body of experimental evidence ... , Processing arrays with for-loops.The patterns found in the examples suggest three common programming practices: . Typically, there is one for loop for each array dimension. C++ arrays are zero indexed, so programmers start the for-loop control variable at 0 and use a strict less-than test in the middle expression, which causes the loop to end after the last element is processed., Here are some of the key benefits of using Elementor Loop Builder: Complete design control: You can design every aspect of your loop, from the overall layout to the individual elements. Easy to use: Elementor Loop Builder is a drag-and-drop tool that is easy to use, even for beginners., What you are trying to do will not work, as you are modifying the list while you are iterating it. Say the current "pointer" points to the first element. Now you pop the first, so the pointer is at the second. But when the loop advances, the pointer is moved to the third, and the second is skipped. It seems you want to find combinations from a ..., When ES6 (EmcaScript 2015) came out, it ushered in a whole new set of methods for iterating over an array. And one of the most useful is the map() method.. Array.prototype.map() is a built-in array method for iterating through the elements inside an array collection in JavaScript. Think of looping as a way to progress from one element to another in a list, while still maintaining the order and ..., Using a for loop, how can I loop through all except the last item in a list? I would like to loop through a list checking each item against the one following it. Can I do this without using indices? Skip to main content. Stack Overflow. About; ... If you want to get all the elements in the sequence pair wise, use this approach (the pairwise function is from …, Begin by adding a loop grid in Elementor Pro. Create a new template. Click on 'create template' and save. This will be the primary image around which your text will curve. • Set the container width and height to 300 each. • Zero out the margin and padding for the container. • Adjust the featured image's margin and padding to zero., The three elements of Loop. Loop components are portable pieces of content that stay in sync across all the places they are shared. Components allow you to collaborate in the flow of work — on a Loop page or in a chat, email, meeting, or document. They can be lists, tables, notes, and more — you’re always working with the latest information in your …, Element On The Loop Apartments. 7887 E Uhl St. Tucson, AZ 85710. Studio-3 bed, 1.5 bath • 405+ sq. ft. 10+ Units Available. Managed by Scotia Group Property Management. Share Listing. Favorite. View Favorite List. , Here's a breakdo... Write a for loop that sets each array element in bonusScores to the sum of itself and the next element, except for the last element which stays the same. Be careful not to index beyond the last element. Ex: If bonusScores = [10, 20, 30, 40], then after the the loop bonusScores = [30, 50, 70, 40] The first element is 30 or 10 ..., Villas Los Duraznos. Find apartments for rent at Element on the Loop from $899 at 7887 E Uhl St in Tucson, AZ. Element on the Loop has rentals available ranging from 405-1081 sq ft., Using the for loop to iterate through an array in JavaScript allows for straightforward, precise control over array traversal. This method involves setting up a loop that continues to execute as long as the loop condition remains true, typically incrementing an index used to access each array element sequentially from the first to the last index., Auto-indexing is the ability for LabVIEW to read and process every element in an array when using a For Loop or While Loop. When auto-indexing is enabled, elements of an array enter the loop and are processed one at a time. Brackets on the input or output terminals of a loop indicate that auto-indexing is enabled., When ES6 (EmcaScript 2015) came out, it ushered in a whole new set of methods for iterating over an array. And one of the most useful is the map() method.. Array.prototype.map() is a built-in array method for iterating through the elements inside an array collection in JavaScript. Think of looping as a way to progress from one element to another in a list, while still maintaining the order and ..., Description. The colon is one of the most useful operators in MATLAB ® . It can create vectors, subscript arrays, and specify for iterations. = fix(k-j). If j and k are both integers, then this is simply [j,j+1,...,k]. x = j:i:k creates a regularly-spaced vector x using i as the increment between elements., The IN_FID then gets added to a list. If the values in NEAR_FID have been seen before during this process then the IN_FID does not get added to the list. I know I havent included it in the code but ideally I would also like to loop through the IN_FID values at random instead of sequentially. What am I doing wrong in this code?, The array is unchanged because the foreach loop cannot modify the array elements. 46 35 24 13. Remember that the foreach loop cannot modify the array elements, but it also uses multiplication, not addition. 88 66 44 22. Remember that the foreach loop cannot modify the array elements. Only the variable num will be doubled, not the original array ..., The forEach() method is an iterative method.It calls a provided callbackFn function once for each element in an array in ascending-index order. Unlike map(), forEach() always returns undefined and is not chainable. The typical use case is to execute side effects at the end of a chain. Read the iterative methods section for more information about how these methods work in general., In Power Automate, loops provide a way to access and perform tasks on each element of an array until a specific condition is met. There are two types of loops available: 'Apply to each' and 'Do until'. The 'Apply to each' loop is ideal when you need to iterate through all the array elements., If you insert lst.remove(x) for the loop body, perhaps then you'll be able to see why you get the result you do? Essentially, python uses a moving pointer to traverse the list. The pointer starts by pointing at the first element. Then you remove the first element, thus making the second element the new first element. Then the pointer move to ..., To begin, we'll make an empty object to store each array element as the key and the number of occurrences as the value. We will then loop through the array using the for-of loop, and on each iteration, we will increment the count for the specific element if it already exists in the object, or set the count to 1 otherwise:, The loop attribute is a boolean attribute. When present, it specifies that the audio will start over again, every time it is finished. Applies to. The loop attribute can be used on the following elements: Elements Attribute ... Element; loop: 4.0: 9.0: 3.5: 4.0: 10.5:, A dive loop, also known as a diving loop, is a type of B&M and Gerstlauer roller coaster inversion whose inspiration was taken from a stunt plane maneuver. It is the reverse of an Immelmann loop. The track twists upward and to the side and then dives toward the ground in a half-vertical loop. This element is common on many B&M roller coasters., The Loop Grid is a widget but acts a little differently from most widgets. In most cases, users drag the widget onto the canvas and then edit them in the panel. With the Loop Grid, however, after you drag the widget onto the canvas, you’ll be asked to create a template. That’s because when you build a loop, you’re creating a template that ..., Villas Los Duraznos. Find apartments for rent at Element on the Loop from $899 at 7887 E Uhl St in Tucson, AZ. Element on the Loop has rentals available ranging from 405-1081 sq ft. , The filter() method takes in a callback function and calls that function for every item it iterates over inside the target array. The callback function can take in the following parameters: currentItem: This is the element in the array which is currently being iterated over. index: This is the index position of the currentItem inside the array., Loop syntax. Loops can be declared by: Using an integer index. This option works when your scenario is: "I want to create this many instances." The range function creates an array of integers that begins at the start index and contains the number of specified elements. Within the loop, you can use the integer index to modify values., The For Loop. The for statement creates a loop with 3 optional expressions: for ( expression 1; expression 2; expression 3) {. // code block to be executed. } Expression 1 is executed (one time) before the execution of the code block. Expression 2 defines the condition for executing the code block. Expression 3 is executed (every time) after ..., In particular, removing objects from a list will cause issues (see strange result when removing item from a list ). I would consider making additional lists, one for your results, one temp list for the elements you have left to process. Note that in my example, tmp1 is your input list. tmp1 = [values to process] tmp2 = [] results = [] while(tmp1), 6. Since the elements have nothing in common, the best you can do is loop through every element on the page, get the background color for each one, and then perform checks. Like so: var elements = document.getElementsByTagName("*"); for(let i = 0; i < elements.length; i++){. var cur = elements[i];