seque | chainable control flow methods for javascript
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chainable control flow methods for javascript.
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QUESTION
I have been working on an algorithm (Dafny cannot prove function-method equivalence, with High-Order-Polymorphic Recursive vs Linear Iterative) to count the number of subsequences of a sequence that hold a property P
. For instance, how many subsequences hold that 'the number of positives on its left part are more that on its right part'.
But this was just to offer some context.
The important function is this CountAux
function below. Given a proposition P
(like, x is positive
), a sequ
sequence of sequences, an index i
to move through the sequences, and an upper bound j
:
ANSWER
Answered 2021-Jun-07 at 13:03You can prove your lemma in recursive manner. You can refer https://www.rise4fun.com/Dafny/tutorialcontent/Lemmas#h25 for detailed explanation. It also has an example which happens to be very similar to your problem.
QUESTION
I have an array which should be sorted based on conditionalTo and set a index based on the sequence, whenever the sequence is changed index should be incremented. once this is done we need to sort the array again based on computationTo within the index only second level sorting should happen
...ANSWER
Answered 2021-Jun-03 at 13:19You are thinking of it in the wrong order. You can sort
the array based on conditionalTo
and computationTo
first. Then, add a sequence
property to each object. Increment it if the conditionalTo
is different compared to the previous object
QUESTION
In Dafny I am trying to make a Max
polymorphic and high-order function that, given a sequence and a predicate, returns the longest subsequence that holds it. For instance, the longest increasing subsequence, or the longest subsequence in which all the elements are zero.
To do so, I designed a slow algorithm (given the P
predicate and a S
sequence):
ANSWER
Answered 2021-Jun-03 at 04:30I wrote code for finding the (leftmost) longest subsequence of zeros from a given integer array. Since you can map sequ
using the predicate, these two are almost identical problems.
QUESTION
I would like to prove this "trivial" lemma in Dafny. A non-empty even sequence, is the concatenation of it's two halves:
...ANSWER
Answered 2021-Apr-27 at 15:56The problem is that the lemma does not hold, which makes it impossible to prove. In the right-hand side of the equality in the postcondition, you're skipping an element. Here is a correct version of the lemma's postcondition:
QUESTION
Okay, so. I have a slideshow on a page of my website. It's supposed to be in one column of my website. The images conform to the column just fine, but the buttons for "next" and "previous" do not. I want them to be on the left and right sides of the column they slideshow is in, and preferably centered vertically as well.
Bonus: Is there any way to make the next and prev buttons circles?
Here is a mock-up of what I'm envisioning for this page.
And here's my code:
...ANSWER
Answered 2021-Mar-31 at 16:17I don't clearly understand what you mean by making them round. Is this what you wanted to achieve?
QUESTION
I'm new to vba and want to automate some processes. I wanted to ask, if there is an opportunity to set up a macro where within the main subroutine I am asked to select a certain cell and hit a predefined key sequence. As a result I'll get cell coordinates and the macro terminates and the key sequ. does no longer trigger any macro behavior.
...ANSWER
Answered 2021-Jan-08 at 13:38Try the next way, please:
Run the
testMacro1
Sub. It will setCtrl + Alt + i
shortcut for the macrotestCalledMacro
.Ctrl + i
andAlt + i
already exist and not recommended to redefine them...;Being on an Excel worksheet press
Ctrl + Alt + i
. The invoked macro should work. But, at the end, it will deactivate its own shortcut.
QUESTION
i am very new to all the swift stuff and i hope somebody can help me with this problem
I have set up the following
- Tabbar Controler with 1 Navigationcontroller
So if i start the application everything is fine and the view controller with the "Button" is loaded in tab 1
Now i want to navigate within tab1 to another view controller with a "label"
Thats what i did :
Connected the button to the new view controller with the label as "Show seque"
If i start the application and click on the button then the new view controller with the label slides and and shows the back button
-- > So everything is OK here in my eyes ..it slides only "once"
But if i add a UIBarButtonItem in the View Controller on the top left programatically and want to navigate programatically to the view controller with the label it is loading twice. I am using the following code:
...ANSWER
Answered 2020-Dec-22 at 01:31Ok i have fixed the problem. Many thanx also for the answers here !!
This was really a hard "nut" and i have searched a long time how to fix this
It was sliding twice because while creating the UiBarButtomItem i used this
QUESTION
I have the following code:
...ANSWER
Answered 2020-Jul-28 at 18:39EDIT: You could also use itertools, as this will give combinations as suggested in the comment.
QUESTION
My TableView Cells aren't loading, when i go to another screen and come back my data shows? any way to fix this
my Code:
...ANSWER
Answered 2020-May-17 at 16:59You are not using your numberOfRowInSection
properly and are confusing sync and async programming.
numberOfRowsInSection
is a synchronous method that needs to return "immediately" the number of rows for that section.
This means that you need to know how many cells are in that section in advance.
Inside of it, instead, you are using a firebase method to get that number, and that method is asynchronous. This means that when you return the number of rows it will always be 0 since the block of code you pass to the observe
method will execute only after some time (the time of the http request to be made).
Another problem in your code is also the fact that you don't know how many times numberOfRowsInSection
is called by the tableView, so you could end up re-making the same http request over and over (maybe not now, but in some future implementation of yours).
You should find a single place, that is maybe called only once and before the table view is shown, to call that method and fill your array before reloading the tableview.
In order to do that, you can add, in the viewDidLoad
the code that handles the fetching of the array of items, than (once it's completed) you can reload the table (after you dispatch on main thread).
It would look something like this:
QUESTION
I am making a change in my application on the UITableView.
I am using a segmented control to determine what the user want to look at. They will either look at sold listings or active listings. That is what listingTypeString
holds.
Here is my sequel, I ONLY want to go into the ViewSingleItem
if the listing is a sold listing. This works, however, when I flip the control to active, I don't seque, however, the console goes errors out as is I went into the ViewSingleItem
. How can I stop this from happening? If the user flips to active, I eventually want a website to load, but for now, I only want it to print what I have below.
ANSWER
Answered 2020-Mar-29 at 18:22you need to perform segue in didSelect Method below method is use to transfer data or values only.
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