Questions tagged [scala]

Scala is a versatile programming language that primarily focuses on the Java Virtual Machine. Crafted to present fundamental coding structures concisely, beautifully, and with utmost safety, it seamlessly blends both imperative and functional programming paradigms. Its standout attributes comprise of an advanced static type system with remarkable type inference abilities, function types, pattern-matching capabilities, implicit parameters and conversions, operator overloading, complete compatibility with Java, and excellent support for concurrency.

Retrieve the ID using AngularJS and save it to resources

As a newcomer to AngularJS, I have a query regarding saving Tasks using a resource. When the Task is saved, it correctly sends the information to the database and the server responds with the ID of the created Task after receiving the POST request. The co ...

scalaresourcesangularjsplayframework-2.0

Creating a personalized serializer for Java 8 LocalDateTime

Having a class named Child1, I initially utilized Joda Date Time to convert it into JSON using Lift Json. However, I now intend to switch to Java 8 LocalDateTime. Unfortunately, I am facing challenges in creating a custom serializer for this transition. He ...

javajsonscalascala-2.11lift-json

What is the best way to incorporate an ID from a scala template into an AJAX request?

In my application built on the Play Framework 2.3.8, users can input questions and answers. The view class receives a List[Question] which is iterated through using a for each loop to display them: @for(question <- questionList){ <!-- Questions --& ...

javascriptjqueryajaxscalaplayframework

New data received in Akka-Http was processed by converting it to a JSON object

Currently, I am working on completing a POST request by unmarshalling received JSON. I need to update the JSON data before submitting it to a Scala method. val route = (path("createDataSets") & post) { entity(as[DataSetEntity]) { dataSetEntity: Da ...

jsonscalarestakka-http

choose an array consisting of spark structures

I'm facing a challenging issue as part of a complex problem I'm working on. Specifically, I'm stuck at a certain point in the process. To simplify the problem, let's assume I have created a dataframe from JSON data. The raw data looks something like this: ...

javapythonscalaapache-spark

Transform the JSON data into a Map containing key-value pairs of type String

I have a JSON input that looks like this: {"a": "x", "b": "y", "c": "z", .... } My goal is to convert this JSON into a Map of type Map[String, String] This map should consist of key-value pairs. Is there a way to achieve this using circe? Keep in mind ...

jsonscalacirce

How to handle top-level field removal in json4s when there is a nested field with a matching name

I need help removing a specific top-level field named "id" within a JSON structure without accidentally deleting all fields with the same name. Here is the code I have been using: scala> import org.json4s._ import org.json4s._ scala> import org.jso ...

jsonscalajson4s

Guide to establishing a connection to CloudantDB through spark-scala and extracting JSON documents as a dataframe

I have been attempting to establish a connection with Cloudant using Spark and read the JSON documents as a dataframe. However, I am encountering difficulties in setting up the connection. I've tested the code below but it seems like the connection p ...

jsonscaladataframeapache-sparkcloudant

A guide to efficiently extracting the accurate ID from JSON using JSONPath syntax in Gatling

My current testing setup involves Gatling for API testing. In one of my scenarios, I need to extract an ID from a JSON response and save it in a variable. However, Gatling doesn't directly support this operation. The specific ID I am looking for corre ...

jsonscalagatling

Serializing and deserializing Tuples with Jackson in Scala using JSON

Here, I am attempting to perform a round-trip operation on a Tuple2 using the jackson-module-scala library in Scala 2.10.4. However, it seems that the serializer encodes the Tuple2 as a JSON array, leading to issues with deserialization. Why does this ha ...

jsonscalaserializationjacksontuples

Getting the error while extracting JSON data using Await.result() with an infinite Duration

Recently, while working with the Scala-Play framework, I encountered an error when trying to fetch data from external websites. The line of code in question is Await.result(xxx, Duration.Inf).json, which resulted in a JsonParseException: Unexpected charact ...

jsonscala

The type hint feature in JSON4S is not functioning as expected

Here is a code snippet that has been causing an issue: implicit val formats = DefaultFormats + FullTypeHints(Contacts.classList) val serialized = Serialization.write(List(Mail(field = "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cf ...

jsonscalaserializationjson4shive-serde

Monitoring the JSON response in Scala

I need to double-check the response I receive from a request and confirm that element1 is 2017 in the following response: body= { "id" : { "element1": "2017", "element2": "ST", "nivaa": "land", "navn": "element3", "nr": "0" }, What would be the ...

jsonscalacorrelationgatling

Converting JSON arrays into structured arrays using Spark

Does anyone know how to convert an Array of JSON strings into an Array of structures? Sample data: { "col1": "col1Value", "col2":[ "{\"SubCol1\":\"ABCD\",\"SubCol ...

jsonscaladataframeapache-sparkapache-spark-sql

Connect the jQuery UI droppable feature to the Lift ajax handler

I'm currently developing a web application using Scala / Lift and I want to enhance user experience by adding drag and drop functionality. However, I am unsure how to integrate jQuery with Lift for this purpose. At the moment, I have a draggable div bloc ...

ajaxjquery-uiscalalift

Scala string: Unescaping made easy

I have come across numerous discussions on escaping strings, but none on de-escaping them. When working with Scala Play, my controller takes in a JSON request. I retrieve a string from it using the following code: val text: play.api.libs.json.JsValue = r ...

javajsonscalaescaping

Tips for dynamically changing the field name in a JSON object using Spark

Having a JSON log file with a JSON delimiter (/n), I am looking to convert it into Spark struct type. However, the first field name in every JSON varies within my text file. Is there a way to achieve this? val elementSchema = new StructType() .add("n ...

jsonscalaapache-sparkparsing

What is a Brief Illustration of the Jackson Scala Extension?

Is there a straightforward example available for utilizing Jackson serialization and deserialization with the Scala module for version 2.10? I am specifically interested in achieving JSON conversion using reflection without needing to annotate or assign fi ...

jsonscalajackson

Playing with Json just got more interesting with the custom JsResultException

Trying to work with Play Json and parsing JSON data using as for individual "fields". For example: val data = (json "dataField").as[String] Encountering a JsResultException when unable to parse or if the field is invalid. Looking for a way to customize ...

jsonscalaplayframework

Retrieving data from a JSON object stored within a database column

There is a dataframe presented below: +-------+-------------------------------- |__key__|______value____________________| | 1 | {"name":"John", "age": 34} | | 2 | {"name":"Rose", "age" ...

jsonscaladataframeapache-sparkapache-spark-sql

What is the best way to extract a generic class parameter from JSON in Scala?

Has anyone encountered a similar scenario as mine? trait Getter[A] { def get: A } I have defined two implementations of classes that implement this trait: case class CoalesceGetter[A](getters: List[Getter[String]]) extends Getter[A] { override def g ...

javajsonscalagenericsjson4s

What is the most effective method for utilizing the 'yield' keyword in Scala?

As I delve into writing code for my PhD research, I am transitioning to using Scala for text processing. Coming from a background in Python, I have found the 'yield' statement to be incredibly useful for creating complex iterators over large, inc ...

pythonscalageneratoryieldtext-processing

Guide on loading a JSON file in Play framework utilizing Scala

In my project, I am looking to retrieve a list of cities from a JSON file within one of my controllers. The intention is to then pass this information to a view for display. The location where I have stored the file is: app/assets/jsons/countriesToCities. ...

jsonscalaplayframework

Play framework fails to apply style attributes correctly

When working with play-framework 2.3.x, I am in the process of creating a form and would like to show/hide it based on a model attribute. Typically, setting the style attribute manually using style = "display: none" and style = "display: block" works fine. ...

htmlcssscalaplayframework

Converting forward slashes (/) to %2f in an AJAX request

I keep encountering this question, but no one seems to have a satisfactory answer. My problem centers around an ajax request that utilizes a value from a text field in the format: 00000000/relay_1A. Whenever I attempt to submit, I receive a 404 error. St ...

jqueryhtmlajaxscala

Processing JSON data with an extensive number of columns using Spark

Currently, I am working on a Proof of Concept for a Spark application written in Scala running in LOCAL mode. Our task involves processing a JSON dataset with an extensive 300 columns, though only a limited number of records. Utilizing Spark SQL has been s ...

jsonscalaapache-sparkmultiple-columns

Transform a Set of Strings into a JSON String in Scala

How can I convert a Set of Strings to a JSON String using Scala programming? data = Set(Client_1, Client_2, Client_3) I have attempted the following: val toString : String = new Gson().toJson(data) But this returns an empty string. Is there a way to pr ...

jsonscalasetscala-collections

Retrieving a specific value from a JSON JDBC column in Spark Scala

Within the mysql jdbc data source used for loading data into Spark, there is a column that contains JSON data in string format. // Establish JDBC Connection and load table into Dataframe val verDf = spark.read.format("jdbc").option("driver&q ...

jsonscalaapache-spark

Interpret JSON data in Scala with unidentified key/value pairs and types

Is there a way to loop through a JSON object in Scala without prior knowledge of the key/value pairs and their data types? ...

jsonscala

Is there a way to transmit a float array from Scala using JeroMQ to C via ZMQ without the need for serialization or deserialization?

I am currently facing an issue where the JSON library I am using to serialize and deserialize data (JeroMQ for sender and C, ZMQ for receiver) is consuming excessive memory during parsing. This leads to the OS killing the process. To address this, I want t ...

jsonscalazeromqdistributedjeromq

Circe is unable to detect a field if it includes an array

There are 2 different scenarios I'm dealing with: one where I can successfully decode a single user, and another where decoding a list of users fails: import User._ import io.circe._ import io.circe.syntax._ import io.circe.parser.decode class UserSu ...

jsonscalacircescala-3dotty

Efficiently storing and managing a plethora of diverse

Hello, I have developed a React application that interacts with my API by sending orders. Here's an example of the JSON data format: [ { "product_id":13, "quantity":2 }, { "product_id":12, "quantity":2 } ] ...

jsonscalarestslick

In Scala using akka-http, fully implement a GET request by sending a pre-configured JSON object and streaming the response

My current challenge is completing a get request by returning a pre-built JsonArray and finding a way to stream it. Currently, I am able to successfully complete the request without any errors and return Json if I convert the JsonArray to a string as shown ...

jsonscalastreamingakka-http

Using a spray to parse a JSON array with nested JSON elements

I have a case class with string list fields and I am struggling to parse it from JSON. I have defined a JSON Reader : val jsonReader = new JsonReader[PeaceWatcherReport] { override def read(json: JsValue): PeaceWatcherReport = { val fields = js ...

jsonscalaspray-json

Sending data from Spark to my Angular8 projectLearn how to seamlessly transfer data from your

I am utilizing Spark 2.4.4 and Scala to retrieve data from my MySQL database, and now I am looking to showcase this data in my Angular8 project. Can anyone provide guidance on the process? I have been unable to locate any relevant documentation so far. ...

mysqlangularscalaapache-spark

Dividing a JSON array into two separate rows with Spark using Scala

Here is the structure of my dataframe: root |-- runKeyId: string (nullable = true) |-- entities: string (nullable = true) +--------+--------------------------------------------------------------------------------------------+ |runKeyId|entities ...

arraysjsonscalaapache-spark

Working with varying data types in JSON using Circe

When dealing with different data types in the same JSON field, such as: "need_exp":1500 or "need_exp":"-" How can this be handled without completely rewriting the decoder? Is there a way to instruct the decoder to automatically convert all integers to ...

javajsonscalacirce

Enhancing the efficiency of consolidating the key value distributed among various JSON entries

Currently, I am storing data in JSON format within a Redis ZSET with timestamps as scores. <timestamp_1> - [ { "key1" : 200 }, { "key2": 100 }, {"key3" : 5 }, .... {"key_n" : 1} ] <timestamp_2> - [ { "key50" : 500 }, { "key2": 300 }, {"k ...

jsonscalaelasticsearchrediscassandra

Issue with Play framework's JSON output functionality

My current situation involves a straightforward action that outputs a JSON object string as shown here: Ok(toJson(Map( "results" -> result_lists ))) Initially, this function performs as expected. However, when I attempt the following: Ok(toJson(Map ...

jsonscalaplayframework-2.0

Scala Play templating with vararg HtmlContent allows for dynamic generation of

I have a standard template in play 2.6, where I need to pass in a variable number of HtmlContents. The template is defined like this (including the implicit parameter): @(foo: String)(content: Html*)(implicit bar: Bar) When working with the template, I c ...

htmlscalaplayframeworkvariadic-functionstwirl

Playing around with Scala to verify JSON data containing IP addresses

Just dipping my toes into the world of Play and Scala, I'm attempting to validate a JSON payload in a POST request within a Play Controller. The code I've managed to put together thus far works fine without input validation, but now I'm hitting a roadblock ...

jsonscalavalidationplayframework

Converting a JSON array to a case class in Scala using the Play Framework can be done, even when the fields in the JSON do not directly match the

I am currently attempting to parse a basic JSON array into a case class using Scala and the Play Framework. Below you will find the code snippet: package com.learning.avinash.query import play.api.libs.json.{JsPath, Json, Reads, Writes, __} import play.a ...

jsonscalaplayframework

Ignoring fields in Spray-json [Scala] - A guide on selectively omitting specific fields

Currently, I am utilizing spray-json in SCALA and would like to omit certain fields from the JSON response. What is considered the best practice in this scenario? You can find more information about SPRAY-Github here. package ru.steklopod import org.scal ...

jsonscalaspray

Executing close() function after all tests in ScalaTest with Selenium have finished running

I currently have several scala tests running, but I am unsure of how to properly close or quit the webdriver once the test run is complete. I know about beforeAndAfterAll, but it seems to act on each test class individually, while I only want to close the ...

scalaseleniumselenium-webdriverscalatest

Parsing JSON data in Scala

Inbound JSON data consists of nested structures that do not directly correspond to predefined classes. Custom parsing is required for certain objects due to the case classes that have been created. { "uuid": "b547e13e-b32d-11ec-b909-0242 ...

jsonscalaplay-json

Creating a JSON-Writable Class in Scala Play: A Step-by-Step Guide

Is there a way to create a function that converts case classes to Json, but only for classes with an implicit Writes defined? import play.api.libs.json._ def myJson(cc: Product): JsValue = { Json.toJson(cc) // simplified } Each case class needs an im ...

jsonscalaplayframeworkplayframework-2.5

Detect JSON files without data using Spark 2.4

I am looking for a solution to detect and avoid processing empty JSON files. Some of the JSON files I receive only contain open and close square brackets, like: []. If a file only contains these brackets, it should be considered empty. Previously, with Sp ...

jsonscalaapache-sparkapache-spark-sql

Maximizing PUT Methods in HTTP RESTful Services

I've been playing around with my routes file and I'm looking to switch up the method being called (delete instead of update). Code Snippets: # User management API GET /users @controllers.Users.findUsers POST /user ...

javascriptangularjsscalarest

Uploading files through AJAX modal window (elevate)

Is there a way to successfully upload files within an AJAX modal window in Lift? I attempted the following approach: ajaxForm( bind("upload", template, "file" -> SHtml.fileUpload(processFile _), "submit" -> SHtml.ajaxSubmit("Subm ...

ajaxscalalift

Processing JSON in a List

My struggle lies in processing a Scala list effectively: At present, I have a list that resembles the following (List(JString(2437), JString(2445), JString(2428), JString(321)), CompactBuffer((4,1))) After processing, my desired outcome is as follows: ...

jsonscala

Converting a Map to Json in Play Scala: A Step-by-Step Guide

Is there a way to convert the given Map structure, which is of type Map[String,Any], into JSON in Scala using Play framework? val result = s .groupBy(_.dashboardId) .map( each => Map( "dashboardId" -> each._1, "cubeId" -> ...

jsonscalaplayframework

Retrieving WebBrowser.Element using Selenium and Scala

Currently, I am developing a Scala helper object that contains high-level functions for interacting with elements on a webpage. These functions are designed to throw a NoSuchElementException if the required element is not found, with the main goal of code ...

scalaseleniumplayframeworkcucumber

Converting a bytestring into regular characters using Python's struct.pack

I have a Python script that generates byte data. import threading import socket import struct import time from datetime import datetime import random TICKERS = ["AAPL", "GOOG", "MSFT", "SPY"] timestamp = datetime.utcnow() ticker = random.choice(TICKERS) ...

pythonscalastruct.packakka-io

scala handling missing fields during JSON serialization in json4s

I've been utilizing json4s for serializing scala map objects. import org.apache.spark.util.StatCounter import org.json4s.DefaultFormats val myMap: scala.collection.Map[String, Map[String, StatCounter]] = Map("key" -> Map("secondKey" -> StatCounter( ...

jsonscalaserializationjson4slift-json

Iterating over numerous data points within a JSON file and leveraging a single value for each instance in Gatling

Here is an interesting coding scenario I encountered: > .exec(http("get print package") > .get("url.json") > .headers(headers_0) > .check(jsonPath("$..shapes[?(@.state=='UNUSED'&& @.assetId==null ...

jsonscalasessiongatling

Implement a guideline in Circe that requires at least one of two fields to be present

In my current project, I am working on a Circe parser that has a schema requirement where at least one of two fields must be set. This specific scenario is posing a challenge as there doesn't seem to be an easy way to achieve this using the Circe API. ...

jsonscalacirce

Tips for retrieving numerical values from JSON paths using Scala

I just received the following response: { "code" : 201, "message" : "Your Quote Id is 353541551" } To extract the number 353541551 from the above response, I attempted to use some basic Scala code snippets. Here's what I tried: .check((status i ...

jsonscala

In search of an efficient method to verify JSON input using the Play framework

While I find it easy to read and validate the expected fields in a JSON input, I struggle with properly handling an exception if an unexpected field is found. It would be helpful if the play framework could provide some guidance on this issue. I could manu ...

jsonscalaplayframework

Converting json file data into a case class using Spark and Spray Json

In my text file, I have JSON lines with a specific structure as illustrated below. {"city": "London","street": null, "place": "Pizzaria", "foo": "Bar"} To handle this data in Spark, I want to convert it into a case class using the Scala code provided be ...

jsonscalaapache-sparkspray-json

Efficiently Indexing JSON Strings from Spark directly into Elasticsearch

Can JSON strings be directly indexed from Spark to Elasticsearch without using Scala case classes or POJOS? I am currently working with Spark, Scala, and Elastic 5.5. This is my current code snippet: val s = xml .map { x => import org.jso ...

javajsonscalaapache-sparkelasticsearch

A practical method for restructuring or dividing a string containing JSON entries

Within my dataset, I've got a string comprising JSON entries linked together similar to the following scenario. val docs = """ {"name": "Bilbo Baggins", "age": 50}{"name": "Gandalf", "age": 1000}{"name": "Thorin", "age": 195}{"name": "Balin", "age": 178 ...

jsonmongodbscalaapache-spark

Working with Json serialization and deserialization in Scala 2.10

It seems that Scala 2.10 has caused compatibility issues with some old libraries like Jerkson and lift-json. The goal is to achieve the following level of usability: case class Person(name: String, height: String, attributes: Map[String, String], friends ...

jsonscalascala-2.10lift-json

What sets apart the usage of pollingEvery when waiting for an element with Selenium?

Consider the following scenario: FluentWait fluentWait = new FluentWait[WebDriver](driver) .withTimeout(timeOut, TimeUnit.SECONDS) .pollingEvery(10, TimeUnit.SECONDS) fluentWait(120).until(ExpectedConditions.elementToBeClickable(element)) Ca ...

scalaselenium

Transform Python code into Scala

After transitioning from Python to Scala, I found myself struggling with the conversion of a program. Specifically, I encountered difficulties with two lines of code pertaining to creating an SQL dataframe. The original Python code: fields = [StructField ...

pythonscalaapache-sparkpysparkapache-zeppelin

Working with JSON Arrays in Scala

Working with a jsArray (json Array) and utilizing the import play.api.libs.json._ library. [{”device”:”Samsung S8”,”android”:true}, {”device”:”iPhone 8”,”android”:false}, {”device”:”MacBook Air Pro”,”android”:false}, { ...

arraysjsonscalaplayframework

Exploring Paths in a JSON Structure using Scala and a List

When working with Play Scala, we can navigate through properties in an object using the \ method: val name = (json \ "user" \ "name") If our path is defined in a list, how can we navigate to the node? val path = List("user","name") val n ...

jsonscalaplayframework