CryptoTracker | Simple app to keep track | Cryptocurrency library
kandi X-RAY | CryptoTracker Summary
kandi X-RAY | CryptoTracker Summary
Simple app to keep track of your criptocurrency investments.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of CryptoTracker
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Trending Discussions on CryptoTracker
QUESTION
I have a React web app with a Firebase backend created with NodeJS. I use Firebase Functions. My Firebase functions execute when I call them from either localhost or from Postman. But when I call the functions from my domain (moonio.io), they are not executed, and the only thing that happens is that I get my index.js file back. Therefore, I'm suspecting my problem to be caused by the rewrites in the hosting part of the firebase.json file (api address "https://europe-west3-cryptocurrency-tracker-moonio.cloudfunctions.net/api" getting rewritten to "/index.html")?
firebase.json
...ANSWER
Answered 2021-Jan-24 at 09:43After many hours I finally found out the problem(s).
- Need to add another rewrite to the firebase.json file for taking care of the api. All the requests to the api must go to the corresponding api function in Firebase functions, and all other requests will go to index.html, as per the requirement for single page applications. Thus, the rewrite part of firebase.json needs to look like this:
QUESTION
I've been having trouble with exporting my GUI project from Eclipse Oxygen. At first I tried exporting my project by going to export>Runnable Jar File>Main Class, but when I try and open my program nothing shows up. Then I tried opening the GUI inside its own class by specifying a Main method in there, and I keep getting the error that I put in the title. Any help would be appreciated. I'll post both of my classes here.
Also I used WindowBuilder plugin to build my GUI.
Main class
...ANSWER
Answered 2018-Jan-06 at 23:36Turns out that winrar does not like runnable jar files. I had tried Right Clicking the file and running it as a java application SE binary, but it would not work. So after @Adam Horvath mentioned that it worked for him I set the exported jar to default java jar and it opened up just fine.
QUESTION
I'm trying to query an API to use the data in a react native app but am running into a problem with accessing data I store in the state. Basically, I am trying to access a markets object which is stored in the state. If I examine the state, I see the markets object is properly set. However, as soon as I try to do anything with the markets object, I encounter an error that says Cannot read property 'markets' of null
.
Why is this happening and how can I fix this issue?
I included the code that causes the issue below. I appreciate any suggestions.
...ANSWER
Answered 2017-May-28 at 11:08Reason is, you didn't define the state
variable in constructor
. Api call be asynchronous so when you get data and do setState
, after that only state
will be available (before that state
will be null
), render will get executed before that and when it will try to access the value this.state.makers
, it is throwing the error:
Cannot read property 'markets' of null
Changes:
1. Define the state
object and define the makers
inside that, like this:
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