spiderman | a crawler with visualized config board

by ltebean JavaScript Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | spiderman Summary

spiderman is a JavaScript library. spiderman has no bugs, it has no vulnerabilities and it has low support. You can install using 'npm i spiderman-crawler' or download it from GitHub, npm.

Spiderman makes it trivial work to write a crawler. It works much like alfred workflow and ios storyboard, you write crawler by defining some components, using segues to connet them, finally write some script to specify data that needs to be transfer from one component to the next;.

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Support

spiderman has a low active ecosystem.

It has 49 star(s) with 9 fork(s). There are 4 watchers for this library.

It had no major release in the last 6 months.

spiderman has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of spiderman is current.

Quality

spiderman has 0 bugs and 0 code smells.

Security

spiderman has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

spiderman code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

spiderman does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

spiderman releases are not available. You will need to build from source code and install.

Deployable package is available in npm.

Installation instructions are not available. Examples and code snippets are available.

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spiderman Key Features

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spiderman Examples and Code Snippets

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Community Discussions

Trending Discussions on spiderman

Filter array of objects through checkboxes

Using two different set of conditions to match and fetch data from db with aggregation pipeline

My super class variables are null when accessing them from childclass

Vaadin Flow: Returning to a view, the view should not reload data from the backend

Vaadin Dataprovider: how to avoid "auto-fetch"?

How to reset MutableLiveData list to display new data when using setOnClickListner?

How to make iterated data render properly in a table with React?

Can someone explain this "Longest Common Subsequence" algorithm?

search in an array using for loop

Use scrapy from a py file (not in command line)

QUESTION

Filter array of objects through checkboxes

Asked 2021-Jun-03 at 02:32

This is a React.js filter problem and I'm stuck here. The problem has static data of movies as an array of objects and we have to filter that data according to the checked state of different checkboxes.

Static Data:

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ANSWER

Answered 2021-May-30 at 22:52

So I had to do a couple changes in your code in order to address for proper filtering:

Added a value key on both listCheckboxesRating and listCheckboxesGenre to use it for filtering.

Source https://stackoverflow.com/questions/67764729

QUESTION

Using two different set of conditions to match and fetch data from db with aggregation pipeline

Asked 2021-May-27 at 07:24

I have a set of conditions which I'm passing in $match stage but for some reason i'd want to fetch data with another set of conditions. These conditions should have to be used in 'OR' conjunction.

...

ANSWER

Answered 2021-May-27 at 07:22

Use $or operator to specify both conditions
to match internal fields use $expr expression condition with $gt operator

Source https://stackoverflow.com/questions/67717347

QUESTION

My super class variables are null when accessing them from childclass

Asked 2021-May-27 at 01:54

I am having a problem when trying to print my ticket(child class) which is all my superclass variables are null or zero not initialized. this is my superclass:-

...

ANSWER

Answered 2021-May-26 at 23:55

When you reference super in the child class, it not bound to the Movie object you created in the main(). That is why you are getting a null value. Look here when I debug the code.

If you want to access the Movie object you created in main(), you can pass it and that will work.

Source https://stackoverflow.com/questions/67713947

QUESTION

Vaadin Flow: Returning to a view, the view should not reload data from the backend

Asked 2021-May-01 at 08:23

Split out from Vaadin Dataprovider: how to avoid "auto-fetch"?.

Given a Vaadin Flow 19 app with a MainView extends AppLayout, a GridView and an EmptyView
And @PreserveOnRefresh annotation is used on MainView.

When returning to GridView, the GridView should be exactly in the same state as before:

open GridView using button in MainView for the first time -> Grid uses DataProvider to fetch data from backend
enter "Spiderman" in TextField with caption "stateCheck"
switch to EmptyView using button in MainView
in the real app: do something in EmptyView and potentially other views
return to GridView using button in MainView for the 2nd time

Then (1) the TextField with caption "stateCheck" should display the value "Spiderman"
And (2) the grid should still show the same data as before; it should not reload the data from the backend

Observed behaviour: (1) is ok, but (2) not: the grid always calls fetch method to get data from the backend.

How do I achieve the desired behavior?

Here's the code of my GridView which also fakes the backend DataProvider:

...

ANSWER

Answered 2021-May-01 at 08:23

This is actually intentional behavior. The server side dataprovider listener needs to be removed when component is detached and rewired on attaching. The reason is that otherwise there would be listeners accumulating and producing a memory leakage. If you think your users would be using refresh page often, you should consider adding a cache to your application to optimize performance.

Now one could entertain with the idea of having this kind of caching of previous loaded data behavior via API in Grid also in Vaadin framework, as it may or may not be desirable. It is application specific.

If the use case of refreshing is really to get the fresh data of live and active database, it is actually desired that data is loaded when page is refreshed.

If the desire is to avoid extra bombarding of DB as data is known to be static, you want to have caching.

Source https://stackoverflow.com/questions/67330474

QUESTION

Vaadin Dataprovider: how to avoid "auto-fetch"?

Asked 2021-Apr-30 at 08:16

Use Case 1 is answered below, Use Case 2 has been moved to a separate question (Vaadin Flow: Returning to a view, the view should not reload data from the backend)

I'd like to use a Vaadin Flow (v14 LTS/v19) grid component backed by a lazy DataProvider which does not automatically fetch data from the backend when the grid is shown.

There are at least two use cases:

showing grid data does not make sense unless the user provided filter parameters
returning to a @PreserveOnRefresh tagged view should not replace the shown data with current data. (further elaborated in update)

Being pretty new to Vaadin 14+, I could not figure out how to achieve this. Every time my GridView is displayed, the count and fetch callbacks of DataProvider are queried. The call originates from the DataCommunicator of the grid.

So for Use Case 1: How to stop the DataProvider from fetching data as long as it does not make sense? And for Use Case 2: How to prevent overwriting the grid state when adding a grid to the UI for the second time?

Thanks a lot!

StackTrace to my fetch callback (Vaadin Flow 14):

...

ANSWER

Answered 2021-Apr-29 at 20:37

For Case 1: In the callback check if you have filter parameters, return an empty set if not. Using the new V17+ API it would look like this:

Source https://stackoverflow.com/questions/67323526

QUESTION

How to reset MutableLiveData list to display new data when using setOnClickListner?

Asked 2021-Apr-16 at 23:58

So I have been trying for quite some time to add a search functionality for my app using TMDB API. What I have managed to do so far is to be able to search for a movie only the first time, so here's the problem when I am trying to search for a movie for the second time it will keep showing me the old movie list from the first search results, never updating the list accordingly to the search.

For example, i searched for a spiderman movie, it will show me every movie that has the keyword spiderman in it, and then when i try to search again for a different movie with a different keyword it will keep showing me the results from spiderman search, so is there any way to reset MutableLiveData list on every setOnClickListner, so I ll be able to search and display new movies on every search?.

Thank you in advance.

Here are the classes:

...

ANSWER

Answered 2021-Apr-16 at 23:58

You need to change the page number from the query so that you can get more data from the API

Here you return only page=1 for every request

Source https://stackoverflow.com/questions/67132802

QUESTION

How to make iterated data render properly in a table with React?

Asked 2021-Mar-31 at 20:39

Using the following data set how can I make the data render properly in the table? Each row represents new row for the table and the objects inside each row represents the data for the columns:

...

ANSWER

Answered 2021-Mar-31 at 20:39

Something like this?

Source https://stackoverflow.com/questions/66894588

QUESTION

Can someone explain this "Longest Common Subsequence" algorithm?

Asked 2021-Mar-31 at 04:26

The Longest Common Subsequence (LCS) problem is: given two sequences A and B, find the longest subsequence that is found both in A and in B. For example, given A = "peterparker" and B = "spiderman", the longest common subsequence is "pera".

Can someone explain this Longest Common Subsequence algorithm?

...

ANSWER

Answered 2021-Feb-15 at 01:09

The missing bit here is "patience sorting", whose connection to longest increasing subsequence (LIS) is a bit subtle but well known. The final loop in the code is a bare bones implementation of patience sorting with "the greedy strategy". It does not, in general, compute a LIS directly, but rather the length of a LIS.

An easy-enough correctness proof, which includes a sketch of what's needed to reliably compute a LIS too (not just its length), can be found as Lemma 1 early in

"Longest Increasing Subsequences: From Patience Sorting to the Baik-Deift-Johansson Theorem" David Aldous and Persi Diaconis

Source https://stackoverflow.com/questions/66192501

QUESTION

search in an array using for loop

Asked 2021-Mar-24 at 09:59

Below is my attempt to search in an array for movies and display them. I have struggling with the java loop as I am not very good with them.

...

ANSWER

Answered 2021-Mar-24 at 07:33

This is probably not the most elegant solution, but I tried to stay close to your initial attempt:

Source https://stackoverflow.com/questions/66776260

QUESTION

Use scrapy from a py file (not in command line)

Asked 2021-Mar-09 at 14:08

Trying to launch scrapy from a py file with this command :

...

ANSWER

Answered 2021-Mar-09 at 14:08

I guess that's because generator doesn't actually runs before you'll retrieve its values. You could try to consume generator somehow:

Source https://stackoverflow.com/questions/66547820

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install spiderman

You can install using 'npm i spiderman-crawler' or download it from GitHub, npm.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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