NamedFieldPuns, model matching using the variable name

{-# LANGUAGE NamedFieldPuns #-} data Factory = Factory { fId :: Int} data Link = Link Int Int Double hasLinkTo :: Factory -> Link -> Bool hasLinkTo Factory{fId} (Link fId _ _) = True Got error • Conflicting definitions for 'fId' Bound at: <source

MS Excel - Extract Unique Text Patterns Substring Keyword

I would like through the use of a MS Excel Formula to extract text/year from a substring of text containing a unique search pattern. I have a column (Cell A2:A19) of unique dates, in some instances there is surrounding text before and after the text,

Scala + pattern matching + Autoboxing chain

This question already has an answer here: How to pattern match on generic type in Scala? 4 answers Am reporting a feature that sounds wierd and unable to reason the following behavior with Pattern matching in scala. def typesPattern(x:Any)= x match{

Indexing jsonb data for pattern matching searches

This is a follow-up to: Pattern matching on jsonb key/value I have a table as follows CREATE TABLE "PreStage".transaction ( transaction_id serial NOT NULL, transaction jsonb CONSTRAINT pk_transaction PRIMARY KEY (transaction_id) ); The content i

here I want to filter the success entries of this string

String = "Success Entries and Failed Entries: {FAILED_ENTRIES=[], SUCCESS_ENTRIES=[1509230024960163905]}"; Here I want to filter out only SUCCESS_ENTRIES like 1509230024960163905 String str = "Success Entries and Failed Entries: {FAILED_ENT

Perl: RegEx: Storing Variable Lines in the Array

I'm developing a Perl script and one of the script functions is to detect many lines of data between two terminals and store them in an array. I need to store all lines in an array but to be grouped separately as 1st line in $1 and 2nd in $2 and so o

Pattern matching operation in Haskell

I have a tuple to pattern match and do some operation on each element in recursively. [(Int, Char, Int)] I found my way around how to correctly pattern match it to access each element like below: ((q1, s, q2):tss) with this I can do some checking ope

How to make the Scala type system catch this MatchError?

I've defined an ordering for Seq[Seq[T]] such that it's a normal lexicographic ordering except all items (sub-sequences) are reversed first (so that C,B,A comes before A,B,C but after A,B,A): implicit def ReverseListOrdering[T: Ordering] = new Orderi

Scala: best nested multiple-condition test

Lately, I frequently end up writing code like that: def doSomethingWithLotsOfConditions(arg1, arg2, arg3...) { arg1.get(arg2) match { case Some(value1) => arg3.get(value1) match { case Some(value2) => arg4.get(arg5, value2) match { case Some(value3)

Java: How to find channel models in a binary file LARGE?

I'm trying to write a program that will read a VERY LARGE binary file and try to find the occurrence of 2 different strings and then print the indexes that matches the patterns. For the example's sake let's assume the character sequences are [H,e,l,l

The pattern F # corresponds directly to the binding

Is it possible in F# to pattern match directly against a let binding? For example, this compiles without any warnings: let value = match arg with | 1 -> "value1" | 2 -> "value2" | _ -> failwith "key not found" Wherea

Regex matching the pattern with a string

I am implementing a method which need to find if the string corresponds to some pattern : I am using the following code : if (Regex.IsMatch(str, @"^[\d]{3}00{\d]{4}$")) { return false; } return true; And test it with this string "123003678&

Replace lines with a line number with lines from another file

I'm searching for an elegant way to replace a block of lines in ASCII-file1 with all lines of file2 beginning with the 2nd line. The lines to be replaced in file1 are encapsulated within blank line nr.2 and nr.3 . The numbers of the first and the las

Extract content from text files with generic rules

I have a lot of text data with different structure. I need to extract parts of these texts based on some text-based rules. I would use regular expressions but unfortunately the people who are using the application have never heard of it. Basically th

PHP regex to return & lt; option & gt; values

Just wondering if you can help me out a bit with a little task I'm trying to do in php. I have text that looks something like this in a file: (random html) ... <OPTION VALUE="195" SELECTED>Physical Chem <OPTION VALUE="239">

iPhone App - Recognition of the cup of coffee

I want to build an iOS application that recognizes patterns in a cup of coffee. For example http://en.wikipedia.org/wiki/File:Coffereading.jpg . This image recognition script could run on the client side (iphone eventually) or on server side. The goa

How would I do this text template matching?

Migrated from [Spirit-general] list Good morning, I'm trying to parse a relatively simple pattern across 4 std::strings, extracting whatever the part which matches the pattern into a separate std::string. In an abstracted sense, here is what I want:

Bit strings corresponding to the Erlang model

I'm writing code to decode messages from a binary protocol. Each message type is assigned a 1 byte type identifier and each message carries this type id. Messages all start with a common header consisting of 5 fields. My API is simple: decoder:decode

perl regex - multiple match, optional match

I'm stuck on this regex. Its matching 2 of my 3 file names. Need help getting all three if possible. I also want to extract one of these values abc|def|ghi as well as ucsb|tech locale name before the extension .edu | .net into variables. Would like t

aiml - jokers between the terms of the motive

Is it possible to use wild cards between terms in a pattern? for example, if I want to answer the question, "How much are overdue fines on my books?" is there a way to use a wild card between the terms "overdue" and "books?"Y