REDB | Source code of the Regular Expression Database
kandi X-RAY | REDB Summary
kandi X-RAY | REDB Summary
This is the source code of REDB (Regular Expression Database). This document should explain all steps necessary to run and use REDB on any machine capable of doing so. ** Third party projects used.
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Top functions reviewed by kandi - BETA
- search handles search requests
- init initializes sql db db .
- index is used to create a new page .
- contrib is used to handle a contrib request
- Game server
- showRegex shows a regex against a request
- Main entry point for example
- getRndTask returns random task .
- isAcceptable returns an error if the Task s match is acceptable
REDB Key Features
REDB Examples and Code Snippets
Community Discussions
Trending Discussions on REDB
QUESTION
I want to check similarity in between 2 images: to
Using code below, I get Difference Percentage-->8.132336061764388. First I resize images to be on the same size and then use the compare method.
I was expect to have small if not none similarity. What is not correct in the similarity check? Is there other precise method?
...ANSWER
Answered 2022-Jan-27 at 09:41Well, first of all, we, humans do not even agree to what "similar" is: is it just the same shape? or even the same color but different markers? aesthetically identical but with different circuitry inside?
Having said that, for computer vision, things are way more complex. Similarly, in computer vision there are plenty of ways to tell if something is similar "at a certain degree": histograms, corners, edges, features, etc...
Have a look at Checking images for similarity with OpenCV for an introduction on the topic.
In your case, the number you obtain for "similarity" is just purely based on the exact pixel representation, and therefore is sensible to scaling the image. Furthermore, keep in mind that scaling an image is a transformation that alters the pixel composition. In particular, you are adding/removing pixels with certain algorithms in such a way some high level features of the image are preserved at a certain extent.
If you want to detect the similarity within two images, you have to first decide what is similar to you, then you can use a combination of multiple techniques to achieve your result. OpenCV provides a good and solid starting base.
QUESTION
I am making a basic drawing application on p5.js.
I have placed my background under the draw function as I have inserted sliders to change the rgb of the background.
Once I do this, I cannot draw however. I have a mousePressed function, which works when I move the background to setup().
Any ideas of why this may be?
...ANSWER
Answered 2022-Jan-10 at 04:54Note that the draw function is continuously executed.
This is what's happening:
mouseDraggeddraws a linedrawfunction runs in the next frame and whatever's inside this function gets re-drawn on top
So if there's a background() call inside the draw function, it will re-draw the background on top of whatever was previously drawn. Hence the order of operation is so important in processing.
In your sketch, instead of drawing the line in mouseDragged, you can to draw it inside the draw loop after background() is called. For example:
QUESTION
I've got a dataframe with data taken from a database like this:
...ANSWER
Answered 2021-Oct-06 at 13:31Not sure if this is the most efficient way, but maybe it helps:
QUESTION
I have two tables Locations and competitors, i want to get the latest row from locations for each competitor order by timestamp in mysql. I don't know how to combine aggregate with non aggregate without changing the sql mode 'ONLY_FULL_GROUP_BY'
Tabels looks like
...ANSWER
Answered 2021-Jul-29 at 13:47When MySQL only_full_group_by mode is on, it means this means that if you GROUP BY by some column, then you can only select one of two things , the column you group by and an aggregate function like MAX(), MIN()...; If you do not want to change your sql_mode (that may result in problems in the future ), below query should work for you.
QUESTION
i'm building an automatic hay feeder for my horse,something like this but with just two floors
every 24hrs the plate in the middle should fall and let the hay fall down for the horse to eat,the interface should be very simple,3 buttons one to start the timer, one to stop it and deploy the hay and one to reset the servo in his initial position to lock the plate again, i'm having some problems with the timer,it starts when i press the green button but after it finishes to count it stops and i have to press the green button again, instead it should go endlessly unless i press the red button to reset it
...ANSWER
Answered 2020-Jun-27 at 22:42Because you used goto, you caused a problem. Once the code reaches the end of the for loop it will then reach the line labelled stopTimer: and set inAction to 0. That stops everything until you press the green button again.
There is no need to use goto, ever in C++. If you ever find that you want to use goto then you are most likely doing it wrong. Try this instead:
QUESTION
I have an application with a thread performing a lengthy task. I trigger the lengthy task using a QPushButton which emits a signal. However, clicking the button makes the GUI unresponsive for the length of the process even though that process is in another thread. Here is a small program replicating this behavior:
...ANSWER
Answered 2020-Jun-22 at 20:32You have to understand that QThread is not a Qt-thread but a handler for native OS threads, similar to threading.Thread.
As the docs points out:
Unlike queued slots or invoked methods, methods called directly on the QThread object will execute in the thread that calls the method. When subclassing QThread, keep in mind that the constructor executes in the old thread while run() executes in the new thread. If a member variable is accessed from both functions, then the variable is accessed from two different threads. Check that it is safe to do so.
(emphasis mine)
That is, only the run() method is executed on the new thread, so "worker" is executed on the thread that belongs to the QThread, which in this case is the main thread.
Solution:If you want the "work" method to be executed then the class object must live in the secondary thread so for that it is enough that WriteThread is a QObject (it does not need to be QThread), and move it to another thread:
QUESTION
I am doing my first project in VHDL, I try to implement 8-bit barrel shifter using mux.
This is code for one block (8 mux in chain):
...ANSWER
Answered 2020-Apr-03 at 15:19You have done a generate with a signal, and compared its value to something. Integers initialise to -2^31, so none of the generate blocks exist because the values you have assigned externally do not get assigned until after the simulation is started, but the generates get created during elaboration (before the simulation starts) using the initial value of redB. Hence no drivers for out_m. Instead of using a signal in the generate condition, use generics instead, as their values are fixed and assigned during elaboration.
QUESTION
I'm creating a JFrame with 3 buttons, 3 checkboxes, and 3 radio buttons. I'm having a problem with a function that is excecuted when 1 of the 3 buttons is pressed. This is the function:
...ANSWER
Answered 2020-Mar-13 at 19:41Do it as follows:
QUESTION
I'm working on a simon-says game as my first React Native app.
The idea is to show the player the sequence according to the round we're in, then let the player press a button, check if that button matches the given seq, if so then let the user press again, calling the function check again. if he did ok in the end of the round then I increase round etc, and then show the sequence again. If the player fails the game will stop until the user press start again.
I don't know how to set a loop that will enable the player to press the buttons untill round is over, because this function is called only on press, so I have no idea how to control it.
The idea is to show the player the sequence according to the round we're in, then let the player press a button, check if that button matches the given seq, then let the user press again, calling the function check again. if he did ok, then I increase round etc, and then show the sequence again.
all this should loop from round 1 to seq.length.
any ideas? my code below. thanks!
...ANSWER
Answered 2020-Jan-20 at 04:54Instead using canPress state, you should set a count state, every time the button is clicked, increase count with 1, and use count to compare with seq.length, and then pass the result to the disabled property, like this
.
You can check the demo on Codesandbox.
Also maybe This one can give you some ideas about loop functions as a component child. https://reactjs.org/docs/jsx-in-depth.html
The code below is from React DocsQUESTION
In short: I'm implementing Simon-Says game app in React Native. (user sees a sequence of flashing buttons, needs to press the buttons in the correct order).
I want to know how to use 2 different states in TouchableOpacity, one of them as a condition to press the button, one for changing the style of the button, and also being notified for this specific press.
So,
I'm having a problem to implement the playerTurn(), because I'm not sure how to pass the canPress state to the TouchableOpacity button, considering I'm passing style state that changes in compTurn() (function that shows a sequence of flashing buttons - then computer turn's over) In the player turn, things I need to consider:
- after the state canPress changes, the user will be allowed to press on the buttons
- user presses one of the 4 buttons
- the method playerTurn() will be notified which button did the player pressed. (I'm asking how can I get that notification from the button to the method?) after that, I can push it's choice to the playerSeq array (if pressed green - pushes 1, etc) and call function that changes the style state (greenFlash for example)
code in short :
...ANSWER
Answered 2020-Jan-19 at 07:52Looks like you want to enable clicking on the buttons if state.canPress = true right? Then upon clicking, you wish to notify by calling playerTurn()?
- You can do something like this for e.g your green button.
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