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Trending Discussions on ng-elements
QUESTION
I have the following list in Python:
...ANSWER
Answered 2021-Jun-01 at 14:13You can use list comprehension:
QUESTION
I need a clause that counts char coincidences between two large strings but omitting '_'
coincidences. I have this code:
ANSWER
Answered 2021-Apr-27 at 19:43It seems that there is no point to insist that you have letters out of "_actg"
all the time. A generalized definition seems to be sufficient. Using library(reif)
:
QUESTION
I'm using Python 3.8.5 on Ubuntu 20.04. Using selenium webdriver on chrome, I want to download the attachment by specifying the licenceId
number (1467250) which is included in this element:
ANSWER
Answered 2021-Apr-18 at 09:40try this
QUESTION
I need to display arrays of different structs, conforming to a common Protocol, in a View.
As advised in SwiftUI - View showing Elements conforming to a Protocol and ForEach over them I tried like this - it works fine!
Now I need to check elements of the array for Equality.
Letting the Protocol conform to Equatable
does not compile -
It gets the error: Protocol 'Suggest' can only be used as a generic constraint because it has Self or associated type requirements
.
ANSWER
Answered 2021-Apr-18 at 16:45you need use and also make Suggest protocol Equatable and then use and define == in Person and Book
QUESTION
I have asked this question previously (see here) and received a satisfactory answer using the purr
package. However, this has proved to be a bottle neck in my program so I would like to rewrite the section using the RCPP
package.
Proper subset: A proper subset S' of a set S is a subset that is strictly contained in S and so excludes S itself (note I am also excluding the empty set).
Suppose you have the following vectors in a list:
...ANSWER
Answered 2021-Apr-16 at 06:37Have you tried optimising the solution in base R first? For example, the following reproduces your expected output and uses (faster) base R array routines:
QUESTION
I know that pop the last element of the list takes O(1). And after reading this post
What is the time complexity of popping elements from list in Python?
I notice that if we pop an arbitrary number from a list takes O(n) since all the pointers need to shift one position up.
But for the set, there is no order and no index. So I am not sure if there is still pointers in set?
If not, would the pop() for set is O(1)?
Thanks.
...ANSWER
Answered 2021-Mar-12 at 01:04On modern CPython implementations, pop
takes amortized constant-ish time (I'll explain further). On Python 2, it's usually the same, but performance can degrade heavily in certain cases.
A Python set
is based on a hash table, and pop
has to find an occupied entry in the table to remove and return. If it searched from the start of the table every time, this would take time proportional to the number of empty leading entries, and it would get slower with every pop
.
To avoid this, the standard CPython implementation tries to remember the position of the last pop
ped entry, to speed up sequences of pop
s. CPython 3.5+ has a dedicated finger
member in the set memory layout to store this position, but earlier versions abuse the hash field of the first hash table entry to store this index.
On any Python version, removing all elements from a set with a sequence of pop
operations will take time proportional to the size of the underlying hash table, which is usually within a small constant factor of the original number of elements (unless you'd already removed a bunch of elements). Mixing insertions and pop
can interfere heavily with this on Python 2 if inserted elements land in hash table index 0, trashing the search finger. This is much less of an issue on Python 3.
QUESTION
I'm curious if there is a way to set the width
property for multiple elements to the same value if they are not siblings to each other. The width should be based on the largest
span element.
The expected result would be something like a table where the left text will automatically grow.
So instead of this:
...ANSWER
Answered 2021-Feb-19 at 13:27Easiest solution, that will work with the HTML structure you have - format the whole thing as a table.
QUESTION
I want to hide below div in all mobile devices
...ANSWER
Answered 2021-Jan-07 at 11:36Use this small JavaScript code to do it :
QUESTION
I'm currently customising my first (woocommerce) email template and I'd like to hide data via CSS display: none
However, I'm wondering what the support of CSS and display: none
is, i.e.
- do all email clients support basic CSS such as
display: none
or is it too much? - what happens if a receiver views emails only in text format (not HTML)? Does the email client convert the HTML to text (i.e. the
display: none
is still not shown) or does the the email client just put out the plain text it can find without HTML conversion (i.e.display: none
content is still shown)? - is there a website to test how emails will look across email clients (outlook, gmail, yahoo, spark, mac etc)?
I know this may be very basic, but I'd truly appreciate any help !
Many thanks
Update:
This website provides some details on hiding elements: http://www.emaildesignreview.com/email-code/hiding-elements-in-email-4922/
I'm currently using the following to try hiding on as many clients as possible:
...ANSWER
Answered 2021-Jan-06 at 23:26The display: none property is fully functional at least on Gmail since 2016, but not in Outlook.
If the email do not recognize the property it will be just ignored. (In this case the inside will be shown).
So if you want to create e-mails and make sure that is working I believe the best way to be sure that is everything OK is to test, create email accounts in various services, and send emails to yourself. Most minor email services will follow the same rules as the bigger ones. There some tools that can help you test it, you can see it in this quetion.
QUESTION
We are trying to parse href
attributes from the DOM of a job website. We want to get an href
for each job.
We usually use CSS paths and pass those to Selenium's find_elements_by_css
method.
Unfortunately, we've noticed that the browser plugin SelectorGadget had trouble providing us with a CSS path. We proceeded to use a CSS path using Google Chrome (ctrl+shift+c). Chrome could extract a path, but neither Selenium nor BeautifulSoup can work with those paths.
After many failed attempts to extract the elements using different classes and tags, we believe something is entirely wrong with either our approach or the website. We hypothesize that the desired elements are impossible to parse by Selenium and BeautifulSoup for whatever reason? Could the iframe
tags in the DOM be a source of error (see this SO question)? What makes the parsing fail here, and is there a way to get around this problem? A website-related problem source would also explain why the SelectorGadget was unable to get a path in the first place. Our conclusion would be to use regular expressions to extract the href
attributes that we need. This would only be a last resort solution.
For German-speakers, please note that there is a spelling error in the target elements:
No luck with BeautifulSoup:
...ANSWER
Answered 2020-Dec-21 at 17:47The element you are searching is inside comments
. you need to have this tag information first and then convert into string and then parse again in order to get the value.
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