Month: November 2022

[Solved] Why iterators are not a solution for CuncurentModificationException?

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[ad_1] From https://docs.oracle.com/javase/7/docs/api/java/util/ConcurrentModificationException.html For example, it is not generally permissible for one thread to modify a Collection while another thread is iterating over it. In general, the results of the iteration are undefined under these circumstances. Some Iterator implementations (including those of all the general purpose collection implementations provided by the JRE) may choose to … Read more

[Solved] Is predicting number of sales a Regression or Classification problem? [closed]

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[ad_1] I don’t understand how it is a continuous output. Looks to me like a discrete output having thousands of values. Well, continuous output here has not the formal mathematical meaning; strictly speaking, you are correct in that your output (some integer value) is discrete, but this is not the point in this context. The … Read more

[Solved] sqlalchemy create tables [closed]

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[ad_1] Short answer is db.create_all(). Here is a piece of this answer app = Flask(__name__) app.config[‘SQLALCHEMY_DATABASE_URI’] = ‘postgresql+psycopg2://login:pass@localhost/flask_app’ db = SQLAlchemy(app) db.create_all() db.session.commit() [ad_2] solved sqlalchemy create tables [closed]

[Solved] Coding a function in python wihch count the number of occurances [closed]

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[ad_1] Use the collections module to use the Counter function. Such as: import collections def carCompt(*args): return collections.Counter(“”.join(map(str.upper, args))) This will return {‘A’:5, ‘D’:1, ‘E’:3, ‘H’:2, ‘L’:1, ‘N’:1, ‘O’:1, ‘P’:2, ‘R’:2, ‘S’:1, ‘X’:1} If you want it to be case sensitive then leave it like: import collections def carCompt(*args): return collections.Counter(“”.join(args)) which will return {‘a’: … Read more

[Solved] Alternate casing for a string algorithm

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[ad_1] You can create a regex to capture words and process using your function to parse individual words. For demonstration purpose, I have used the regex: /[a-z0-9]/gi (assuming you will have only alphanumeric characters in a word. Please update the regex if you can have other characters as well.) Following is a sample: function toCapitalize(s) … Read more

[Solved] Convert Yards to Miles, Furlongs and Yards

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[ad_1] Never mind, figured it out. const furlongToYard = 220; const mileToYard = 1760; class Distance { yardsToMilesAndFurlongsReadable(yards) { let miles = Math.floor(yards / mileToYard); yards = yards % mileToYard; let furlongs = Math.floor(yards / furlongToYard); yards = yards % furlongToYard; return `${miles > 0 ? miles + ‘m’ : ”} ${furlongs > 0 ? … Read more

[Solved] Saving a web page to a file in Java [closed]

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[ad_1] This is HTTP. You can’t just open a socket and start reading something. You have to be polite to the server and send a request first: socket.getOutputStream().write(“GET /index.html HTTP/1.0\n\n”.getBytes()); socket.getOutputStream().flush(); Then read a HTTP response, parse it, and get your html page back. EDIT I wrote what to do with sockets only because it … Read more

[Solved] How to create following JSON using JSONObject java?

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[ad_1] Your question is unclear but if you just want an example of JSONObject then the code below can generate what you want. JSONObject car = new JSONObject(); car.put(“car”, new JSONObject()); JSONArray brands = new JSONArray(); brands.put(“C”); brands.put(“D”); car.put(“brands”, brands); JSONArray cars = new JSONArray(); cars.put(car); JSONObject json = new JSONObject(); json.put(“cars”, cars); System.out.println(json.toString(2)); The … Read more

[Solved] How to call this function from other activities?

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[ad_1] Create Kotlin file, e.g. named Utils; Move function to that file, and add Context parameter: fun checkConnectivity(ctx: Context): Boolean { val cm = ctx.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager val activeNetwork =cm.activeNetworkInfo return activeNetwork != null && activeNetwork.isConnectedOrConnecting } If you intend to use it only in Activity you can create extension function without Context parameter: fun … Read more