Questions tagged [parsing]
Parsing is the process of analysing a string of symbols, either in natural language or in computer languages, conforming to the rules of a formal grammar.
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Text splitter using Regular Expressions in Python
I have been provided a text splitter class that will take a text input and use re.sub to make replacements when matches are found and also splits sentences up and stores them in a list.
I had an idea ...
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Menu Parser in C
This is a simple program that parses a menu specification and creates a menu tree.
Why?
I want to create a menu application, where the user can select an entry in the menu, and either a submenu can ...
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I am building a container of differently typed variables with names for easy parsing and usage in Rust
I am new to Rust and trying to learn more about it. I want to have some kind of container that can store parameters (variables, values, constants) of varying types together with a name. This container ...
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Reading 12-bit words from 32-bit stream
I have a device (ADC) that stores its samples in a 32-bit buffer and each sample is a 12-bit word :
I needed an algorithm to read those samples to a container (say ...
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Regex and pandas to read forecast sky condition string
DataFrame methods to parse the sky condition from a terminal aerodrome forecast.
A line in a taf can report zero-eight cloud layers. Cloud layers are required in predominate lines, and optional in ...
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Markup Language Parser in C++
I'm new to C++ and decided to write a parser for a markup language. I chose org-mode because it seemed relatively straightforward.
parsertest.cpp
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Python script for zlib decompression
I'm looking for feedback/improvement on code that I wrote. It's a function that scans a file for zlib headers and returns the header, offset, and decompressed data. In main, below the function, I use ...
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Parsing an IP routing report with half a million lines into a PANDAS dataframe
I have a file that has around 440K lines of data. I need to read these data and find the actual "table" in the text file. Part of the text file looks like this.
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Fetch CSV file into PANDAS and send report of Spotify statistics
I'm relatively new and self taught in Python. I've written this code which gets a CSV file from a website, plays around with the data then creates an email with information gleaned.
I know this is too ...
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Processing a binary file with buffer length tags
I am trying to process a very large binary file using MappedByteBuffer from java.nio package.
This is how the data looks like in the file:
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Parsing indented text into a tree structure in C#
My goal is to take an input stream (text file), and then parse it into a tree node based on each line's indentation.
My rules are
Lines can be indented using either tabs or spaces, but the file must ...
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Haskell: implementing Read for a custom dynamic value type
I'm using Haskell to interpret a dynamically-typed language. I have a sum type called Value which can represent some basic objects:
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Quickly read numeric input
Do you have any criticisms or corrections or improvements?
I need to read only numbers(and this numbers could be from 0 to 1000000)
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Function to read a file until next token
I've got this function which reads an entry until the next starting Token determined through a function, as the nature of the token is flexible.
Usage:
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Python script to analyse Apache log files
I am fairly new to Python programming language. Most of python programmers have heard the philosophy behind the python programming language. The code should be easy to read, easy to understand, simple,...
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Parse a string with titles and subitems to an object
I want to parse a string to an array of object with following those rules:
parse line by line
if line starts with "*" this is a title
if line starts with "\s**" this is a ...
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Awk program for extracting unique values from a k1=v1,k2=v2,... list
A single string consisting of comma-separated pairs in the format <key>=<value>, like
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Gemtext parser in JavaScript
Gemtext is a lightweight markup language designed to serve content over the Gemini protocol.
You can learn more about the language here: A quick introduction to "gemtext" markup, or the ...
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formatting flattened string into JSON-like object in C++, part 2
I have reworked the code from my previous (linked) post.
For reference:
I have a string which contains JSON-like object flattened (stringify()ed).
I need to JSON-...
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Mini Scheme interpreter
Right now, I'm working on an interpreter for a subset of the Scheme programming language. It supports lambdas, let/let*/letrec, procedures, combinations, ...
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formatting flattened string into JSON-like object in C++
I have a string which contains JSON-like object flattened (stringify()ed).
I need to JSON-ify it back. It's a custom format, so I wrote function to JSON-ify the ...
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Script to fix linkage done with #pragma comment(lib, "a.lib) for Visual Studio project
I have a legacy project that has a lot of linkage done using #pragma comment(lib, "libname.lib"). Moreover, some projects define linker directives in ...
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Better ways to parse the Content-Length from the HTTP header
I have a buffer that contains the HTTP header, which contains the Content-Length string indicating how big the file is that needs to be downloaded.
I am looking to ...
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Implementation of a Parser for Analysis Description Language
I have created a script for parsing ADL and the code looks like below. Example ADL file
I am looking for suggestions to divide the code in multiple methods and make it more readable. Thanks
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Boolean expression evaluation for user input using evil eval
The following code is a module that evaluates boolean expressions, which are entered through an unauthorized web API. The exposed function of the library being used is ...
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Lexer for a Scheme-like language in rust
I was/am working on an interpreter for a scheme-like language. Just some time back I shifted my implementation from C++ to Rust, which I just started learning. I know there are parser libraries like ...
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Good practices for parsing this text file
I have the following .txt file structure that i want to parse in Java(8):
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Parsing a std::string to a dictionary (std::map)
As always - the context !
Preliminaries
Recently I needed a way to transport data from one environment to another. Though the proper way (probably) to do this would be to use databases (which I don't ...
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Advent of Code 2021: day 10- Syntax Scoring
The following code solves day 10 in the advent of code challenge.
The goal for this time around is evaluating whether a line of brackets
is complete, has a syntax error or is missing some closing ...
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Parsing A Simple Matrix Definition In C
In one of my homework projects, I have to parse a matrix definition into a matrix data structure in C. The elements of the matrix will be given in a list of double. I need a simple tokenizer and ...
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Parse a selection of date formats
This Bash program parses day, month, year and month and year from arguments:
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Extracting a part of a URL path
I have a string like the one below from which I am extracting the tariff name.
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Convert number 1-5 from its spelt-out form
I'm working with an API that for some strange reason returns star ratings as words, like FIVE,FOUR,THREE,TWO,ONE. As far as I can see, there's no way to just get ...
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Python Fasta Parser using dictionaries without using BioPython or other external libraries
I am writing my own parser for fasta format. I can't use Biopython or anything else, because it's a part of an assigment and our teacher wants us to try to do it manually.
For now, I have done this:
<...
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Find the average score, given data in a table with labeled columns not in a fixed order
I was on Hacker Rank for the first time and there was a question that required to get the inputs from STDIN and use collections.namedtuple(). It was my first time ...
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Parsing data from different file formats
While setting up applications to communicate between various different trade partners and our WMS software I often have to parse very similar information from various different file formats. In this ...
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i3 config file parser
So I am using i3 an Linux window manager to manage my windows. In addition this is run on a laptop that is frequently mounted to several output-displays. This is handled by the following lines in my ...
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Bash argument parser with support for concatenated flags and '=' or ' ' between arguments and values
This is my best attempt so far at a bash script argument parser written without GNU getopt or bash getopts
the first two ...
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using pandas and numpy to parse dirty .csv
I'm relatively new to Python have been writing for a few months now. I've started a Pandas Numpy project that starts with parsing large and somewhat sloppy formatted textfile, its not exactly csv but ...
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Python program that analyzes a corpus for randomword generation
I play a lot of old-school western CRPGs, and most of them (if not all) require the player to generate an avatar at the start of a new game, including naming the character (with names that will never ...
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PHP fetch an automated email, parse text for specific data, store, send summary
I'm new here. I recently found myself in charge of a large PHP-based system. The guy that wrote it produced some of the worst code I've ever seen. I've never been in charge and have had the luxury of ...
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Optimize lexer/parser bottleneck in C++
I am writing a parser for a custom mesh format for fluid dynamics simulation library, the mesh file contains 3D points (vertices) for the simulation mesh, for example:
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Parsing words from string
I am learning Java, so I am beginner. I know I can do this with split function but I want to improve my algorithm knowledge.
I will be glad if you help me. Thanks.
inputStr variable is contains the ...
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How could this indentation-based lexer be simplified?
I finally got this lexer working, full implementation here. How can the lex function be simplified? The goal is to take a tree of indentation-based text, and ...
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Small combinator parsing library in Haskell
I recently wrote code to parse lambda expressions written in a lisp like format, using a small hand-rolled parsing library.
The goal
This code was written as a part of this code-golf challenge not as ...
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Function to skip characters
A very simple function that can be used such that it returns a pointer to the first character on which func returned 0. However, ...
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Preprocessing invalid xml before feeding it to a parser
As part of a larger project I'm writing to learn C++, I'm trying to read through some almost-XML files generated by another program. Unfortunately this program uses its own custom escaping logic, so ...
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Yet another .ini parser for AutoHotKey
I decided to learn a little about AutoHotKey, to practice a little and learn about classes.
I ended up writting a basic ini file parser.
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Extracting items from comma/semicolon-delimited strings, discarding parts after a hyphen
New Scala dev here. Is there a more idiomatic or efficient way to accomplish this in Scala?
Given a list of the following strings, I need to obtain the unique 'main parts' once any parts including ...
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Parsing input and output currency names
The input for price() would be STRINGS, as you see below. If the string starts with "-" I would like what follows to be stored in fiat_name and then retrieve the symbol from ...
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