Questions tagged [file]
A block of arbitrary information, or resource for storing information, accessible by the string-based name or path. Files are available to computer programs and are usually based on some kind of persistent storage.
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Game involving finding words containing letters from a memorized list
I wrote this Java game where the user memorizes a list, gets given letters and needs to find a word that contains those letters. The player has only a few seconds to enter the word.
Example:
Program ...
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Writing billions of lines to text file in java [closed]
I'm trying to write billions of strings lines to a file, it works for up to 40 million lines, but it's throwing out "java.nio.BufferOverflowException" error for 400 million lines. I also think my ...
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Go command-line tool to do some simple byte manipulation
I have some files containing 16-bit words in big-endian order, and a tool to process them that assumes little-endian order. I therefore need to swap the order of each pair of bytes in my files.
This ...
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Python functions to save JSON and H5 to local files and S3
I'm trying to copy files to S3 after writing them locally:
I have 2 functions which I need to do this. What is the best way to refactor the code that exists in both.
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2
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F# wrapper to generate SHA256 signature for a file
I've created the following module to allow me to generate a SHA256 signature for a file. (In real life this is used to verify an image file hasn't been amended). The cut down code looks like this:
<...
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4
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Reading a text file that may have embedded nulls
I've always used fgets to read a file. However, I want to read a file that may have embedded \0. I thought of using ...
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Pulling images from Windows 10 Lock Screen to a different folder
Windows 10 has an interesting feature where it will display "fun facts" and images on the lock screen. Occasionally, these images are something I would want to use for a background.
These images are ...
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Processing file inclusion directives using mutual recursion
I am preprocessing a set of files where one file is included in another file with an include tag like shown below:
file A
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Simple one-time pad in Rust
I am new to rust and to start learning the language I decided to implement a simple one-time pad encryption program.
The part I am least sure about is the reading and writing from the files. Ideally ...
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Parsing version from Cargo.toml
I want to get version from Cargo.toml and use the value inside my app. Here is a function I wrote:
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1
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Two cross-platform implementations of getline in C
I created my cross-platform implementations of getline function in C.
It takes different arguments and have different return values than 'original' ...
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Linux cat command in C
I wrote my own implementation of the linux cat command in C for my computer laboratory class. We were asked to replicate its functionality with no options passed as arguments or with just the -b, -n ...
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Read/write a pipe-delimited file line by line with some simple text manipulation
This code that I wrote is supposed to read/write a pipe-delimited file line by line to a new file with some simple text manipulation. (It also adds two new columns) and publishes a "Status Update" ...
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Code creates huge Text File [closed]
A Java program that writes each digit on a new line, from 1 to max integer. We should end up with 2.4 Billion lines. After looping to near the maximum integer, the text file becomes really huge. Like ...
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59
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Sharing File (Content) without saving it before
I have a listview of PrivateFile objects which contain the fileId (int), fileName (String) ...
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Reading all file contents via x64 assembly
I have come up with the following snippet by building upon the answers given to my StackOverflow question. Just trying to get some other eyeballs to review things so that they can point out any ...
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Sorting words by frequency
I'm doing a simple task in Rust after reading the Rust book:
read a text file
split it at whitespace
sanitize words by removing non-letter characters
sort the words by their frequency of occurrence
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2
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592
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Multi-Line text reader
I am attempting to teach myself C++ by writing a simple multi-line text reader that reports the lengths of each line. What can I do better now that I have something that "works?"
Conventions:
...
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Find a valid english phrase that is identical to what the user entered, save a missing consonant
The Task:
The user enters a path to a dictionary file (one word per line) and a phrase as system arguments. My code must then find phrases containing only valid English words, generated by removing ...
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My own getline function for reading strings from files
I am a newbie to C++ and I want to do some cool stuff with it. Here I have implemented my own getline function which reads from a file. so what do you think of this getline function?
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Simple command-line XOR encryptor/decryptor for files
I just made this simple XOR encryptor and decryptor.
It needs a file with the "private" key string inside.
usage:
encryptor "file to encrypt/decrypt" "file with the private key" "output file"
To ...
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Python code to get all lines between two keyword lines in a file (with exceptions)
I have coded multiple variations on this and would like to make it generic, to avoid coding any more variations.
Comments and suggested improvements, please, (typos also), and what about that ToDo ?
I ...
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Concatenating an already existing filename to create a new file
I had answered this question from stackoverlow and the code below is code that I wrote to explain to the OP a possible way to achieve what I believe they were looking for.
The general idea that I ...
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Basic C copy file implementation
I'm a java programmer by trade and starting to learn C/C++. I'd appreciate any pointers on glaring issues with my code style which is acceptable in java but not in C. I feel like open_files is ...
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Locate substrings within a file
Here, I am reading in a newline delimited file that can be millions of repeating lines that looks like this:
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2
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356
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Write output file, collating groups of up to 7 input lines
I have this code that reads a file and after processing a few lines writes the output to a second file:
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2
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167
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Implementation of getdelim
Note: I wasn't trying to follow the POSIX getdelim signature exactly. I needed to add the consume argument for a project I'm ...
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1
answer
98
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Finding the longest word without these characters follow-up
Here I asked this question:
My goal is to go through the list of all English words (separated by
'\n' characters) and find the longest word which doesn't have ...
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votes
1
answer
90
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Looping through file finding sequences
For an assignment, I had to loop through a text file, and report any positions that a user entered sequence was found. Is there any way I can make this code more efficient, because it seems like I'm ...
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Count characters of a text file
This program counts the number of the occurence of each character that is used in a file.
I tried to use everything that Java offers to me properly. If you have tips which library functions would ...
user189218
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2
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Reading new data from a constantly updating file in Java
I have a log file which is constantly updated with new lines of data. I need to get new added data in java as soon as it's written. For now my solution is:
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Write byte array to end of file
I'm writing a byte array at the end of file. The code works fine, but can you please suggest performance improvements?
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Invert rows and columns in an Excel file
Annother little excercise with openpyxl:
Say you have a Excel file like this:
The Goal is to make make it look like this:
My code to acomplish this:
inversion.py
...
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answer
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Excel blank row inserter
I wrote a program as an excercise, to check the openpyxl module, which inserts blank rows into an excel file. See the docstring in the code for more description.
I ...
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1
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Java splitting too large text file enhance performance
I have a too large data.txt file containing data as follows:
...
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Find big files on the harddrive
For practicing Python I wrote a script which scans the harddrive for large files and lists them in a report. The script takes the root path and then all the subfolders are scanned aswell. Also the ...
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Mad Libs excercise
I did the following Excercise from Automate the boring stuff with Python Chapter 8:
Create a Mad Libs program that reads in text files and lets the user
add their own text anywhere the word ...
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2
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452
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Text Duplicate filter in Python 3.7
I wrote this program just to remove duplicates from wordlist used for brute-force, but it can be used for every txt file i guess.
It is a pretty long program for what it does, and I'm sure there is a ...
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Minimalistic, self-contained class for reading a sectionless INI file
When sections are ignored and no writing capability is needed, an INI reader becomes quite simple to implement. Here is my attempt at reading a sectionless INI file without any non-...
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Unit tests for directory-entry counter
I have a function that simply counts the number of files in a directory. To test this function I am using temporary files which are great in the respect that they are deleted upon creating. However, ...
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1
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Count features in a file, using parallel code
When processing large files (say for parsing or performing computations based on the contents), we want to be able to use multiple processes to perform the job faster.
In my case I wanted to count ...
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Small program to get binary diff offset between two small files
Trivial utility program meant to go through the list of (small) files and report file offset of the first difference between them. The goal of the code is simplicity.
Any recommendations are useful. ...
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Program that finds the longest word not containing one of the disallowed characters
Problem definition
Find the longest word that doesn't contain any of the following characters:
gkmqvwxz
Input comes from a file named ...
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1
answer
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Making a Zsync file archive with checksums
I'm learning go by doing it. I tried to port the Java's ZsyncMake implementation into Golang.
I also employ the Go's concurrency API with goroutine and channel.
I have some experience in Java, but ...
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680
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Detect file type using file signatures
My program has to detect the real file type of a given file using signatures. For now I'm just checking JPG, but I want to add more.
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Comparing two large binary files in C
I'm trying to read two sufficiently large binary files, comparing them and printing the offset at which they differ. I'm using fread to read the binary files and <...
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Process CSV files that follow the first nonempty one
I have a list of CSV files (all have the same fields), some of which are empty. My goal is to find the first nonempty file and use that as the "base" file for an aggregation. After finding the base ...
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Copy certain lines from one text file to another
I need to open a file, read a line and if that line respect some conditions write it to another file, the line that I'm reading is a normal ASCII string representig HEX values and I need to paste it ...
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View, append, write, or delete a file
I am just wondering if I need to refactor this code into smaller functions, or if it is OK as it is. I know that code should be as clean as possible, but I don't see a need to declare a new function ...
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