logo
Tags down

shadow

How do I turn this regex into a Megaparsec parser without making a mess?


By : Zach R
Date : September 15 2020, 07:00 PM
I wish this helpful for you Without reading carefully, I guess the bit that's giving you trouble is this part:
code :
(.*),[^,]*
sepBy (many (noneOf ",")) (string ",")
/[^=]+/baz=
slashPath = string "/" <++> path
path = string "baz=" <|> (many (noneOf "=/") <++> slashPath)
(<++>) = liftA2 (++)


Share : facebook icon twitter icon

FParsec combinator to turn Parser<char,_> until Parser<string,_>?


By : ajolson1964
Date : March 29 2020, 07:55 AM
Hope that helps The |>> operator is what you're looking for. I quote the FParsec reference:
code :
val (|>>): Parser<'a,'u> -> ('a -> 'b) -> Parser<'b,'u> 
let jnumber =
    let neg = stringReturn "-" -1 <|> preturn 1
    let digit = satisfy (isDigit)
    let digit19 = satisfy (fun c -> isDigit c && c <> '0')
    let digits = many1 digit
    (digit |>> string) (* The operator is used here *)
    <|> (many1Satisfy2 (fun c -> isDigit c && c <> '0') isDigit)

regex issue in making a markdown parser


By : wwhite
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You could make sure to only match the wanted number of hash signs by making sure that the first character of the heading text isn't a hash sign. This can be done by using [^#] like this:
code :
string = re.sub('^#{1}([^#].*)$', '<h1>\\1</h1>', string, flags=re.MULTILINE)
string = re.sub('^#{2}([^#].*)$', '<h2>\\1</h2>', string, flags=re.MULTILINE)

How can I turn this mess in a single loop?


By : naren vivek
Date : March 29 2020, 07:55 AM
seems to work fine I want to change this long piece of code in a single loop: Please help me. , You can use .forEach():
code :
itemAll.forEach(function(item, i) {
  item.addEventListener("click", klick.bind(undefined, i));
});

How to use async and await to turn an active (Pull-) Parser into a passive Push-Parser?


By : Elm Ahdy
Date : March 29 2020, 07:55 AM
Does that help for your efforts. What I'm trying to achieve here is an Inversion of Control Flow and that is what yield and also async/await are made for. They build a State machine that can return directly after the 'yield' or 'await' Command. 'yield' returns Values, 'await' retrieves Values, so using these Constructs you can switch Control Flow both in Read-Scenarios as well as in Write-Scenarios. In this case I can provide a Task-Factory that creates a new Task for each Character I want to consume:
code :
public class TaskFactory<T> {
    public TaskCompletionSource<T> Task { get; private set; }

    public Task<T> GetTask() {
        Task = new TaskCompletionSource<T>();
        return Task.Task;
    }
}
var completion = new TaskFactory<char>();
var isFound = searcher.IsFound(completion.GetTask);
foreach(var chr in hayStack) {
    completion.Task.SetResult(chr);
    if (isFound.IsCompleted) {
        break;
    }
}
return isFound.Result;

My Megaparsec parser gets stuck and ghci debugging isn't helping either


By : Anuoluwapo Phillips
Date : March 29 2020, 07:55 AM
it fixes the issue The sepEndBy sourceline scn will keep iterating as long as it can get the sourceLine and scn parsers to match. However, both of those parsers can complete successfully without consuming any input, so they will always match. Since all of the branches of sourceLine have a try, any parse error will cause the parser to back off and just match an infinite number of empty source lines. Even without a parse error, reaching eof will produce an infinite number of source lines.
Related Posts Related Posts :
  • split by newline - returns an array containing the original String if no matches
  • Regex to match 6 digits but no repeating
  • Edit/Match a string n lines below some specific match in Perl?
  • Faster way to update in oracle
  • How to use Regular expression in perl if both regular expression and strings are variables
  • How to add '-' after each character in string using regex in python3?
  • Batch File Command - Remove Lines With Phrases From File
  • Using REGEX to remove duplicates when entire line is not a duplicate
  • Replacing passwords in /etc/shadow with masking text for administrative purposes
  • Regex pattern expression missing variations
  • Expect separator only if other two groups were satisfied
  • finding the column value * using awk
  • Match Single Word Not Containing dot
  • Multiple replace regex in one Apache-NiFi statement
  • Apply character set in regex lookbehind
  • Match all line with a start pattern and a word or not
  • Regex for three letters and four numbers?
  • regex split string by specific values
  • How to use "\w+" to find words in a string?
  • Can you restrict two characters based on their ASCII order in regex?
  • sed replacement for a negative number
  • Formatting a number extracted from regex
  • How to match signs in Bash, mainly "+" "-" "/" "*"
  • Regex doesn't ignore the optionnals groups
  • Perl regex over multiple lines
  • Perl regex line match with dot
  • Extract string matching a specific format
  • Perl Regex regular expression to split //
  • Parsing string with two captures in bash
  • How to tokenize an String like in lexer in java?
  • Fix unbalanced quotes within fields not across records
  • Regular expression Proof
  • Python Multiline Regex Parsing
  • Using a batch file, how can I determine the number of fields in a CSV file?
  • make sure that punctuation is always placed in the right way
  • Regular Expressions: '\<' vs' \b'
  • VBA Regex substitution codes
  • How to change a word that is neither in the beginning nor in the end using regex?
  • Multiply a decimal number in vim by a fixed amount
  • Having a problem with multiple hyphens in a multistring regex match in Perl
  • how to extract required string using regular expression
  • Perl regex with shell
  • Powershell specific character not match for function
  • Perl Regular Expression issues, now I have no hair
  • Get a part of the second group
  • Regex match word if not as part of a specific phrase
  • Regex Expression for duplicated commas within string
  • How to put quotes for all the numbers using regular expression?
  • Regex: is there a oneliner for this?
  • Searching for substring "52" in variable value "52/80" doesn't work in TCL
  • Regex for matching numbers with optional decimal digits
  • vim substitution, searching up to a sequence of characters
  • Parsing a string by using regex
  • Using regex to find lines which start with AND end with heart
  • Clarification regarding nested groups in regex
  • How to use a variable inside case insensitive regex in Dart
  • Need suggestion in Regular expression
  • TCL Regex ignore/parse leading asterisks in string
  • How to extract value form json using Regex
  • Filtering matching patterns with regular expressions
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk