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Lines of Code : 15
License : No License
Copyconst binarySearch = (arr, item) => {
let l = 0,
r = arr.length - 1;
while (l <= r) {
const mid = Math.floor((l + r) / 2);
const guess = arr[mid];
if (guess === item) return mid;
if (guess > item) r = mid - 1;
els Community Discussions
Trending Discussions on zen
QUESTION
I want to deploy hexo to github page:https://chenjuexu.github.io/
But it did not work like below:
$ hexo generate FATAL YAMLException: can not read a block mapping entry; a multiline key may not be an implicit key (107:18)
104 | deploy: 105 | type: git 106 | repo:https://github.com/chenjuexu/chenjuexu.gi ... 107 | branch:gh-pages ...ANSWER
Answered 2021-Jun-14 at 02:43Just cancel it because its version updated
QUESTION
I am using a compute instance VM of Google Cloud, have installed Debian 10 and PHP 7.3.
Then tried to run this:
...ANSWER
Answered 2021-Jun-04 at 14:57This is a known and expected behaviour which has been called out in spamhaus site as well.
It is applicable to the internal DNS resolver for your VM as well. Google DNS will return a "not listed" (NXDOMAIN) reply from ‘Spamhaus' public DNSBL servers because there is a DNSBlock enabled for Google DNS services.
I recommend you to use your own DNS servers when doing DNSBL queries to Spamhaus. If that is not possible, contact Spamhaus Technology for other options.
For further more information on DNSBL, refer the link
QUESTION
Sorting dates throws exception TypeError: data.createdAt.sort is not a function. I would like to sort and display the latest record first in my react app.
ANSWER
Answered 2021-May-28 at 22:24Sorting should be done before mapping the values
QUESTION
I am trying to make a program that can add customer's name, age, contact number and email. And I want to search for the name that the user wants but it does not search the name even if I entered exactly the same name. How to fix this?
Here is my code:
...ANSWER
Answered 2021-May-13 at 05:43name is a String. Your List contains customers instances, not Strings. Therefore your List doesn't contain name.
In order to lookup an instance of one type by a key of another type, you can use a Map:
QUESTION
I'm trying to configure Zeek in order to store files (every file) on disc, but without any success. OS I'm using: Debian 10.
What I did so far:
I've installed this module: https://github.com/hosom/file-extraction (even after following this site https://www.ericooi.com/zeekurity-zen-part-vi-zeek-file-analysis-framework, I couldn't put it to work).
I've loaded frameworks/files/extract-all-files script.
I can see the scripts are loaded, after checking loaded_scripts.log
I'm a beginner on Zeek, and I'd like to learn how to enable zeek to save files (that is traversing the network) and store on disk. The only sort of files that is being stored: HTTP and SSL.
I'm sure I'm making many mistakes, but I'm not able to find the correct way.
EDIT
Zeek version I'm using: zeek version 4.1.0-dev.545.
I'm processing traffic. I haven't tried anything with pcap, but I'll try what you've suggested with "zeek -r the.pcap policy/scripts/frameworks/files/extract-all-files.zeek".
On Zeek server, I've installed (in order to test) a FTP and a HTTP server. At html folder, I created a pdf file (so I can download it later). I've put two files (a pdf and a plain text file), and I downloaded (using a browser on another computer in the local network) that pdf file. As a result, I can see (looking at ftp.log and http.log) all the files that I mentioned, but those files aren't stored on disc. My doubt is: should they be stored by Zeek?
...ANSWER
Answered 2021-May-12 at 19:20A common problem when running traffic through Zeek is that packets may have invalid checksums. Zeek by default skips such packets, so the net result is missing logs/files/artifacts that the user expects to be there. Often those invalid checksums are caused by checksum offloading, where the packet capture process grabs transmitted packets before the NIC had a chance to fix the checksums.
Zeek normally warns when it encounters invalid checksums -- look for the something resembling the following on stderr, or in reporter.log:
Your trace file likely has invalid TCP checksums, most likely from NIC checksum offloading. By default, packets with invalid checksums are discarded by Zeek unless using the -C command-line option or toggling the 'ignore_checksums' variable.
(This is from find-checksum-offloading.zeek, which is included in Zeek's default configuration.)
You have many options here. You can:
- run Zeek with
-C, as per the above - say
redef ignore_checksums=T;in a script (usually local.zeek) - add the redef at the command line:
zeek -r the.pcap ... ignore_checksums=T - fix the checksums in the pcap, e.g. with
tcprewrite -C -i input.pcap -o fixed.pcap(tcprewriteships with tcpreplay) -- this is best if others will consume your pcap too.
QUESTION
after I applied some processings e.g. cv2.Canny(), it looks like this now:
As you can see that the black lines become hollow. I have tried erosion and dilation, but if I do them many times, the 2 entrances will be closed(meaning become connected line or closed contour).
How could I make those lines solid like the below image while keep the 2 entrances not affected?
Update 1
I have tested the following answers with a few of photos, but the code seems customized to only be able to handle this one particular picture. Due to the restriction of SOF, I cannot upload photos larger than 2MB, so I uploaded them into my Microsoft OneDrive folder for your convenience to test.
https://1drv.ms/u/s!Asflam6BEzhjgbIhgkL4rt1NLSjsZg?e=OXXKBK
Update 2
I picked up @fmw42's post as answer as his answer is the most detailed one. It doesn't answer my question but points out the correct way to process maze which is my ultimate goal. I like his approach of answering questions, firstly tells you what each step should do so that you have a clear idea about how to do the task, then provide the full code example from beginning to end. Very helpful.
Due to the limitation of SOF, I can only pick up one answer. If multiple answers are allowed, I would also pick up Shamshirsaz.Navid's answer. His answer not only points to the correct direction to solve the issue, but also the explanation with visualization really works well for me~! I guess it works equally well for all people who are trying to understand why each line of code is needed. Also he follows up my questions in comments, this makes the SOF a bit interactive :)
The Threshold track bar in Ann Zen's answer is also a very useful tip for people to quickly find out a optimal value.
...ANSWER
Answered 2021-May-07 at 15:27Canny is an edge detector. It detects the lines along which color changes. A line in your input image has two such transitions, one on each side. Therefore you see two parallel lines on each side of a line in the image. This answer of mine explains the difference between edges and lines.
So, you shouldn’t be using an edge detector to detect lines in an image.
If a simple threshold doesn't properly binarize this image, try using a local threshold ("adaptive threshold" in OpenCV). Another thing that works well for images like these is applying a top hat filter (for this image, it would be a closing(img) - img), where the structuring element is adjusted to the width of the lines you want to find. This will result in an image that is easy to threshold and will preserve all lines thinner than the structuring element.
QUESTION
I am creating a website for my school coding class using Adobe Dreamweaver, but I have run into an issue.
I have two articles and am trying to get them inline. They are both set to block, and I know that they should be inline-block elements, but setting it to that causes a problem.
I have a navigation bar above these two articles, and if I make these articles inline-block elements, it makes the navigation bar disappear. I don't know why this is happening, and have tried asking my teacher and classmates for help, but can't find a solution. Here is an image of what it looks like with both articles as block elements:
This is what it looks like when they are inline-block elements:
I want the articles to be together, as shown in the second image, but I still want to keep my navigation bar. Note that the navigation bar is styled with 'position:fixed', so that it always stays at the top of my page. I also want to keep this, but I feel as though it may be the cause for my problem. Here is a snippet of the code which I made (sorry if it doesn't work properly, and that the images don't work)
...ANSWER
Answered 2021-May-11 at 12:49The problem: when you make the class left and centre inline-block, the margin-top of the nav is -130px. This makes it go out of screen.
A more clean solution would be to use flex box, and have some flexibility ;) of the alignment of items. In the solution, i removed the margin and changed it, see below:
QUESTION
I'm trying to get soft shadows to look nice on this animated mesh test
https://codesandbox.io/s/zen-black-et9cs?file=/src/App.js
No amount of playing with the shadow mapSize or shadowBias appears to fix this strange grainyness/artifacting I see on the animated mesh shadow.
Does anyone have any thoughts on what to try to improve these shadows?
...ANSWER
Answered 2021-May-01 at 00:00This call is causing it:
QUESTION
This article on the Svelte website says, "The compiler (in Svelte's case) can identify and remove unused styles. No more append-only stylesheets!"
There are two options for loading Bootstrap SCSS:
- Load all of their SCSS via
@import 'node_modules/bootstrap/scss/bootstrap'; - Load only what you need to support the components you are using to ensure the generated CSS is as small as possible as documented here.
Would Svelte's compiler eliminate the need to do #2 above? It would be pretty cool if I don't have to get into the details of what in Bootstrap I am and am not using and still get the smallest possible generated CSS.
...ANSWER
Answered 2021-May-07 at 18:16Svelte's unused style removal happens at the component level. It analyzes the selectors used in your component's
QUESTION
I'm a junior web developer and I'm working on this site but I have encountered an issue which I can not seem to fix on my own. I have made an accordion but when I scale the site down, the header text seems to overlap the dropdown icon. Here I have attached two screenshots of how the text overlaps Screenshot 1 , Screenshot 2.
I have also attached screenshots of the HTML and CSS: HTML CSS.
...ANSWER
Answered 2021-Apr-25 at 16:58Add a padding-right to accordion-item-header class. In the below code ive added 2.5rem as padding-right.
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