constructr | Coordinated cluster construction | Key Value Database library
kandi X-RAY | constructr Summary
kandi X-RAY | constructr Summary
ConstructR is for bootstrapping (construction) an Akka cluster by using a coordination service. Disambiguation: Despite the similar name, ConstructR is not related to Lightbend ConductR. ConstructR utilizes a key-value coordination service like etcd to automate bootstrapping or joining a cluster. It stores each member node under the key /constructr/$clusterName/nodes/$address where $clusterName is for disambiguating multiple clusters and $address is a Base64 encoded Akka Address. These keys expire after a configurable time in order to avoid stale information. Therefore ConstructR refreshes each key periodically.
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QUESTION
I'm performing 2 big for loop tasks on a dataframe column. The context being what I'm calling "text corruption"; turning perfectly structured text into text full of both missing punctuation and misspellings, to mimic human errors.
I found that running 10,000s rows was extremely slow, even after optimizing the for loops.
I discovered a process called Batching, on this post.
The top answer provides a concise template that I imagine is much faster than regular for loop iterations.
How might I use that answer to reimplement the following code? (I added a comment to it asking more about it).
Or; might there be any technique that makes my for loops considerably quicker?
...ANSWER
Answered 2021-Sep-06 at 10:56apply can be used to invoke a function on each row and is much faster than a for loop (vectorized functions are even faster). I've done a few things to make life easier and more performant:
- convert your text file into a dict. This will be more performant and easier to work with than raw text.
- put all the corruption logic in a function. This will be easier to maintain and allows us to use
apply - cleaned up/modified the logic a bit. What I show below is not exactly what you asked but should be easy to adapt.
ok, here is the code:
QUESTION
I am currently writing an analytics system. Currently, it caches Events in RAM. It writes to the Filesystem via NSUserDefaults (iOS) and SharedPreferences (Android) when the App closes, as JSON. This Data is read when the app opens.
It also sends every N seconds or when the amount of Events reaches 20. When the sending was successful, it deletes all events that were send from the RAM.
This has some obvious flaws: When the app crashes, all data from N seconds is lost. When the server cannot be reached (because Server is down for example) and the app crashes, even more data are lost.
My question here is: How can I improve the "safety" of my data and prevent massive data loss when the server is down or not reachable?
Here is my current code (unimportant parts removed)
...ANSWER
Answered 2020-Mar-11 at 10:04I think the easiest way is writing "Property Wrapper" for cachedEvents so it would directly access to UserDefaults, it seems the operation is not so huge to bother.
Second way - you could simply save cache to UserDefaults every N seconds/minutes or so if you care about performance a lot. Though, it wouldn't made your system bulletproof
QUESTION
I have a component that renders leaflet map perfectly and I can draw some polygons on it. I added htmlToImage library to take a screenshot of what I have drawn and if I append it as a child to the same component, it will render fine. But I like to pass that image source to the next component(sibling component) and do other stuff on it. I tried to implement a service that my first component writes the dataURL as a string variable and the second component gets that variable and use it to display image from that stored path. The first component routes to the next one with router-link method as a sibling component (going from home/map to home/image) but it won't show the image and simply the console.log(path) is empty string which is what I initialized in my service, originally. What am I doing wrong?
I am using Angular 9 and running on local host. Here is what I have tried to so far:
map.component.ts
...ANSWER
Answered 2020-Feb-27 at 22:08I created an example map into MapComponent and followed the documentation of ngx-leaflet-draw and ngx-leaflet in order to draw a polygon inside a map. After creating a polygon in /home/map route I stored the image with the polygon into ProjectService for getting it into ScreenshotComponent after going to /home/image route through the button with the routerLink directive.
I tried to be descriptive with the method names in order to see easily what is happening.
map.component.html
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