Why you cannot use an unsafe keyword in an iterator context?

In looking at this question which Jon did a fine job in answering... 'How to read a text file reversly with iterator'. And there was a similar question in which I answered using pointers hocus...

Reading from a serial port manually using VB.net

I need to connect to an AND GF 3000 e-scale using RS232. I've tested the connection using HyperT and AND's own program and it's working. Now I'm creating a VB app to read the thing and so far it's...

Error in readChar(con, 5L, useBytes = TRUE) : cannot open the connection

The 'mow.R' now contains: library(RgoogleMaps); png(filename="RgoogleMaps-package_%03d_med.png", width=480, height=480); MyMap <-...

C# BinaryReader.ReadChar throws "System.ArgumentException: The output char buffer is too small" when reading NetworkStream

When reading C# NetworkStream (from stream-type TCP socket), BinaryReader.ReadChar occasionally throws exceptions System.ArgumentException: The output char buffer is too small to contain the...

Streamwriter Not Working

I'm trying to write a variable in a txt file, but it's not really working. If I replace the variable with just a normal string it's fine. Code: Private Sub write() Dim writer As...

RStudio not picking the encoding I'm telling it to use when reading a file

I'm trying to read the following UTF-8 encoded file in R, but whenever I read it, the unicode characters are not encoded correctly: The script I'm using to process the file is as...

Read multiple .txt files into R Vector as Individual Elements

I have a folder on my desktop named "project". Inside this folder are multiple .txt files (e.g. 1.txt, 2.txt, 3.txt, etc.). Does anyone know of a solution that would enable me to have a vector...

How to check potentially empty stdin without waiting for input?

I am attempting to read from keyboard input without waiting for input. The purpose is to be used in an "infinite" loop ala while True:. Thus far I've been trying to manipulate the readchar library...

Error in enc2utf8(x) : argumemt is not a character vector

Error in enc2utf8(x) : argumemt is not a character vector is the error I get when I try to run the code below in R 3.1.2 . can anyone please help me understand if I am missing something here ? OS...

Assembly Language program stuck in an infinite loop

My program seems to be stuck in a loop after the program prompts the user to input the paragraph. TITLE CSC221A4 (CSC2214.asm) INCLUDE Irvine32.inc .data mainMenu1 BYTE " ", 0Ah, 0Ah,...

R regular expression scientific notation

I'm pretty sure what I'm looking for is a Regular expression in R for reading scientific notion. Below is what I have done and the specifics. I very much appreciate any help. I have a text file...

Read Null terminated string in python

I'm trying to read a null terminated string but i'm having issues when unpacking a char and putting it together with a string. This is the code: def readString(f): str = '' while True: ...

R 64-bit shiny ERROR: invalid 'nchars' argument

I am currently moving a (localhost) shiny App from a windows 32-bit to windows 64-bit . Google didn't managed to answer my problem :( so I'm asking the community ! This App worked fine on 32 bits,...

Error when importing text from files (readChar Error in file.info(filename[i]) : invalid filename argument)

I was importing text from files following the code explained here by Tommy: https://stackoverflow.com/questions/9068397/import-text-file-as-single-character-string I imported the name of the files...

Getting error "readchar is not defined" when trying to read one character from user

I want to accept only one character from user. I searched on the internet and I found readchar. It's fine while using this in my terminal. I get my expected answer. But when I want to write a...

Error message for keyboard-chord code: termios.error: (25, 'Inappropriate ioctl for device')

I'm a python beginner, and I was recently trying to code a program that required the readchar module. However, I kept getting the error message: termios.error: (25, 'Inappropriate ioctl for...

Why DataInputStream can't read char correctly?

I tried to write String in DataInputStream, when read from DataInputStream single char, but I have an error. I expected, that readChar() return 'q', but method: assertEquals('q',...

How to check simultaneously for serial input and input from keyboard (simultaneous use of readchar and serial library)

I am trying to code the following using python3 in a raspberry pi: wait for a 14 digits bar code (barcode scanner connected through usb port and input received as keyboard data) after a barcode...

How to debug FactoInvestigate error: cannot open the connection

Anyone faced this error: Error in readChar(con, 5L, useBytes = TRUE) : cannot open the connection I was trying to investigate the MCA results using: Investigate(MCA_res, file = "MCA.Rmd",...

R: Cannot load .rda file into R Studio --> cannot open compressed file 'ESL.mixture.rda', probable reason 'No such file or directory'

I am new to R and trying to figure out how to load a data file into RStudio. The file is ESL.mixture.rda and comes from this site: link to data in Non-Linear SVM Classifier section I saved the...

Read UTF-8 text in R

I try to read a sql file like so: fileName <- paste0("C:/SomeWhere/", "test.sql") test <- readChar(fileName, file.info(fileName)$size) Unfortunately my text is in UTF-8, which look like this at...

PuTTY not sending data to AVR serial

in an exercise for my embedded programming course we have to program an Atmega328p AVR chip to receive data through the serial port. We have to do this by calling a function that waits until it...

s3.save a json file to aws s3

I'm trying to save a correctly formatted json file to aws s3. I can save a regular data frame to s3 with e.g. library(tidyverse) library(aws.s3) s3save(mtcars, bucket = "s3://ourco-emr/", object =...

Python (preferably 3) equivalent to INKEY$

I am using Python 3.6.4 on a Windows 7 system (I have other systems like Win 10 and Android but this is my starting point). INKEY$, for those not familiar with BASIC (pretty much any flavor), is a...

-Collection was modified; enumeration operation may not execute

Continuous data is coming from the serial port.I'm transferring data from the serial port to the c # ms chart. but I am encountering this error. I looked at a few solutions but I couldn't...

How to read a .MAP file extension in R?

Is there a simple way to read a file of .MAP extension in R? I have tried a few options below but had no success. Here is a .MAP file for a reproducible example. context: For some odd reason, the...

Limiting decimals of AUC to be printed with with ROC curve in pROC

I have successfully created a plot with multiple ROC curves of different prediction models in the same plot and the numerical value of the AUC and CI is printed nicely on the side. However it...

Is there a way to load .RData or .model files in sparkR (using databricks)?

I'm using sparkR inside databricks environment and I'm trying to load an XGB model that has been created using RStudio. I saved the model both in .RData and .model (using xgb.save) types (just to...

Debug with gdb an application running with different libc (ld-linux.so)

I would like to debug with gdb an app on an embedded system. This app requires a newer glibc, threading and works correctly by invoking the Linux dynamic loader ld-linux-x86-64.so.2. What I would...

Error: Storage::readChar(): invalid position using Sumo, veins example and omnet++

I've been using Veins (v5.1) along with SUMO (v1.8) and OMNeT++ (v5.6.2) in Linux Ubuntu 20.04 and 18.04. When I try to run the example provided by veins I keep getting the same error both in...

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