Questions tagged [io]

Within the realm of technology, input/output, abbreviated as I/O, is the method of transfer between an information processing system like a computer and external entities, which could be a human or another information processing system.

Create a new JSON file and add data using ObjectMapper

My current project involves delving into Jackson to gain a better understanding of how it works. I am in the process of creating a simple program that can both read from and write to a file, specifically storing JSON data in it. This project revolves aroun ...

Storing data in a TypeBuffer and then retrieving it from a file can lead to surprising outcomes

Upon executing the following code: var list = new Uint32Array(16); for (var i=0; i<16; ++i) list[i] = i; fs.writeFileSync("list", new Uint8Array(list).buffer); console.log([].slice.call(new Uint32Array(fs.readFileSync("list")))); We anticipate the out ...

How can I access and read the stdout output in Python programming?

I am trying to capture all the output text from stdout as a string. from sys import stdout stdout.read() # throws io.UnsupportedOperation: not readable Here is an example of the desired outcome: print("abc") stdout.read() == "abc" # ...

Skipping objects during unpickling in Python can be achieved by defining a custom unpick

I want to efficiently access specific objects in a file where multiple large objects are stored using the pickle module. I don't want to load all the objects before the one I need. Let's say I have a file with only numbers as an example. import p ...

Contrasting readline and fread/fgets functions in PHP

Throughout my experience, I've consistently relied on the readline function for handling console input. However, recently I stumbled upon the fread and fgets functions and it left me wondering: what sets these two methods apart? // Code example using ...

Is there a way to transfer an array of strings and integers from JavaScript to Python 3.8?

I have reviewed similar questions but haven't found a solution that works for me. My inquiry is regarding the following code snippet: function pyInput(){ const buffers = []; proc.stdout.on('data', (chunk) => buffers.push(chunk)); proc.stdo ...

Filtering input based on its occurrence rate (enable/disable debounce)

Utilizing node on a raspberry pi and the module onoff to capture input. I am interested in running function B only if function A is triggered twice within one minute. var gpio = require('onoff').Gpio; var sensor = new gpio(7, 'in', &ap ...

What is the best way to align column values to the left when using the `to_string()` function

Is there a way to save a pandas dataframe to a file using to_string() while left-aligning the column values? Currently, when using to_string(justify=left), only the column labels are left-aligned. For instance, if we have pd.DataFrame({'col1': ...

Access JSON information from a URL by utilizing Java

I have read some answers like Simplest way to read JSON from a URL in Java but it did not work. Okay, here is my code: package day1; import java.net.HttpURLConnection; import java.net.URL; import java.util.Scanner; import org.json.simple.JSONArray; imp ...