I can't solve this Question i need answer for it.
I have this engish satetment :
"Every new beginning comes from some other beginning end".
and i want to convert it to first order logic.
Related
I want to be able to search for a letter using Regex and then convert the case of the letter. I know I can refer to the letters and use this:
Search for ^[adw] and replace with \U0 for example but I can't do this searching for ^\w so the expression applies to any letter in the search.
I have read a reply from the author of the product that refers to this:
https://www.editpadpro.com/history.html#800
In here the relevant change is:
Regex: Replacement string conditionals in the form of (?1matched:unmatched) and (?{name}matched:unmatched)
But it's not clear to me what this means. How do I actually use this?
If I have these strings and want to change the case of all the first letters in each sentence how would I use this conditional syntax to achieve it?
an apple a day.
dogs are great animals.
what about a game of football?
The result I want is this:
An apple a day.
Dogs are great animals.
What about a game of football?
I am at the end of my rope. I have been doing internet searches for tutorials and help on this simple task and after nearly a hundred different links visited, I am no closer to my answer and I'm about to have a breakdown.
All I need is to write a simple pseudocode function that takes an input file with a list of strings (book titles) with a list of prices directly next to them, and when the book title matches the user's input, it spits out the price.
Basically all I need to know is how to get the second part of the line in the file that has the price, assuming it is separated by a space or comma. But no matter what string of search characters I use in Google, no one else on the planet seems to have ever had this requirement and I'm going insane.
I'm building an application that returns results based on a movie input from a user. If the user messes up and forgets to space out the title of the movie is there a way I can still take the input and return the correct data? For example "outofsight" will still be interpreted as "out of sight".
There is no regex that can do this in a good and reliable way. You could try a search server like Solr.
Alternatively, you could do auto-complete in the GUI (if you have one) on the input of the user, and this way mitigate some of the common errors users can end up doing.
Example:
User wants to search for "outofsight"
Starts typing "out"
Sees "out of sight" as suggestion
Selects "out of sight" from suggestions
????
PROFIT!!!
There's no regex that can tell you where the word breaks were supposed to be. For example, if the input is "offlight", is it supposed to return "Off Light" or "Of Flight"?
This is impossible without a dictionary and some kind of fuzzy-search algorithm. For the latter see How can I do fuzzy substring matching in Ruby?.
You could take a string and put \s* in between each character.
So outofsight would be converted to:
o\s*u\s*t\s*o\s*f\s*s\s*i\s*g\s*h\s*t
... and match out of sight.
You can't do this with regular expressions, unless you want to store one or more patterns to match for each movie record. That would be silly.
A better approach for catching minor misspellings would be to calculate Levenshtein distances between what the user is typing and your movie titles. However, when your list of movies is large, this will become a rather slow operation, so you're better off using a dedicated search engine like Lucene/Solr that excels at this sort of thing.
I'm very new to programming and am a beginner in Ruby. I've done a lot of searching to try to find the answers I need, but nothing seems to match what I'm looking for.
I need to make a program for work that will:
Get keywords from the user
Match those keywords with the same keywords in a database of sentences, and then
Spit out randomized sentences that:
contain all the keywords 1 time
do NOT contain keywords not listed
do NOT duplicate keywords
Important to know: Sentences all have a mix of several keywords, NOT one per sentence
1 & 2 are OK, I've been able to do those. My problem is with part 3. I've tried long lists of "if include?" parameters, but it never ends up working and I know there must be a better way to do this.
My grasp of Ruby (and programming generally) is basic and I don't really know what it can and can't do, so any tips or hints in what functions would be useful would be very very much appreciated.
If the match is found, why don't you consecutively pop it out of your array/db? It will ensure no duplication, since that record would not be present to be matched later. No?
Consider this snippet:
db=%q(It is hot today), %q(It is going to rain), %q(Where are you, sonny?), %q(sentence contains is and are)
keyw=%w(is am are)
de=[]
keyw.each do |word|
for index in 0...db.length
if db[index].include?(word)
puts "Matched #{word} with #{db[index]}"
de<<index
end
end
until de.empty?
db.delete_at(de.pop)
end
end
db is database example and keyw contains keywords.
Corresponding output:
Matched is with It is hot today
Matched is with It is going to rain
Matched is with sentence contains is and are
Matched are with Where are you, sonny?
No duplication. :)
I'm trying to find an elegant solution on how to convert something like this
ALL CAPS TEXT. "WHY ANYONE WOULD USE IT?" THIS IS RIDICULOUS! HELP.
...to regular-case. I could more or less find all sentence-starting characters with:
(?<=^|(\. \"?)|(! ))[A-Z] #this regex sure should be more complex
but (standard) Ruby neither allows lookbehinds, nor it is possible to apply .capitalize to, say, gsub replacements. I wish I could do this:
"mytext".gsub(/my(regex)/, '\1'.capitalize)
but the current working solution would be to
"mytext".split(/\. /).each {|x| p x.capitalize } #but this solution sucks
First of all, notice that what you are trying to do will only be an approximation.
You cannot correctly tell where the sentence boundaries are. You can approximate it as The beginning of the entire string or right after a period, question mark, or exclamation mark followed by spaces. But then, you will incorrectly capitalize "economy" in "U.S. economy".
You cannot correctly tell which words should be capitalized. For example, "John" will be "john".
You may want to do some natural language processing to give you a close-to-correct result in many cases, but these methods are only probablistically correct. You will never get a perfect result.
Understanding these limitations, you might want to do:
mytext.gsub(/.*?(?:[.?!]\s+|\z)/, &:capitalize)