how to pass multiple selected items from listview to rest api in flutter

In my flutter app I have Student data in ListView now if select more than one student then how to pass selected students enrollment number and class number to API . This is my code: String get Roll_numbers=>’$enrollment_no1’+’\$’+’$class_structure_id’; I print this string into terminal so output is: print(Roll_numbers); —>3245$10 Problem is that when i select…

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Google’s OR-Tools – single event planning

Google’s OR-Tools provides some example code demonstrating how to solve the nurse-scheduling problem. I’m trying to adapt it to solve an interview-planning scenario wherein a single candidate will attend 2 meetings. Each meeting has the following requirement: Each meeting must have 2 attendees Solving Requirement (1) is pretty simple: meetings = [“phone_screen”, “in_person”] users =…

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Structured Streaming Error :– java.lang.NoClassDefFoundError: Lorg/apache/kafka/common/TopicPartition;

I was able to run Kafka structed streaming in local but with yarn-client I get this error. I didn’t resolve the problem. I will appreaciate any help. bin/spark-submit –master yarn –deploy-mode client –packages org.apache.kafka:kafka-clients:0.10.2.0,org.apache.spark:spark-sql-kafka-0-10_2.11:2.3.2 –jars /usr/hdp/3.1.4.0-315/spark2/jars/spark-sql-kafka-0-10_2.11-2.3.2.3.1.4.0-315.jar,/usr/hdp/3.1.4.0-315/spark2/jars/spark-streaming-kafka-0-10-assembly_2.11-2.3.2.3.1.4.0-315.jar /home/pivot.py I can this code(pivot.py) in local but, in yarn-client it responds with this error Caused by: org.apache.spark.SparkException: Job…

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Print arbitrary hex characters in u-boot shell

I’d like colorize my u-boot bootcmd so it prints a breathtaking error message. Normally I’d just use ANSI escape sequences such as below. #!/bin/bash printf ‘\x1b[31mERROR\33[0m’ #!/usr/bin/env python print(“\x1b[31mERROR\33[0m”) How can get equivalent behavior in u-boot? It seems u-boot will just remove the backslash such as below # u-boot shell echo \33[31m # prints “33[31m”…

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