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I have a text file with contents as:
...
*..
*..
...
The vehicle used are:
*Car(Marathi, Nissan, Toyota)..
*Bikes(Yamaha, Hero Honda)
*...
*...
*...so on..
The items used are...
*..
*..
Now I need to search for the key word "vehicle" and put the options Car(Marathi, Nissan, Toyota)..), Bikes(Yamaha, hero honda), etc into a list.
i.e. Everything that comes after "*" in a line, must be an item of that list.
Linq must be used or any other means where loops are not allowed.
The desired result is not really clear.
If you need a List<string>, containing
"Car(Marathi, Nissan, Toyota).."
"Bikes(Yamaha, Hero Honda)"
"..."
"..."
"...so on..
you could do
var result = File.ReadAllLines(#"<pathToYourFile>")
//skip lines without "vehicle"
.SkipWhile(m => !m.Contains("vehicle"))
//skip the line with "vehicle"
.Skip(1)
//take the following lines starting with an "*"
.TakeWhile(m => m.StartsWith("*"))
//remove the "*"
.Select(m => m.Replace("*", string.Empty))
//enumerate to get a List<string>
.ToList();
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Rearrange the key values in the hash below to look like:
{"abc"=>"wqeq","dfg"=>"sadsada","qwe"=>"asdad","yui"=>"asdasd","abc"=>"weqqw","qwe"=>"assadsad","yui"=>"asd","dfg"=>"asdsad"}
{"abc"=>["wqeq","weqqw"] ...}
Thanks
The problem here is that assigning a key with the same value as a previous one overwrites it.
As far as I'm aware, there's no code-based solution to solve this; you just need to re-write it with arrays as the keys' values where they're duplicated.
{"abc" => ["wqeq", "weqqw"],
"dfg" => ["sadsada", "asdsad"],
"qwe" => ["asdad", "assadsad"],
"yui" => ["asdasd", "asd"] }
I guess that's the output you're looking for. If not, please add a little more info to the questions and I / others will be able to help out.
If you want to bring a gun to a knife fight, you can use compare_by_identity:
hash = {}
hash.compare_by_identity
hash["abc"] = "wqeq"
hash["abc".dup] = "weqqw"
# ... etc ...
puts hash # => { "abc" => "wqeq", "abc" => "weqqw" }
... and then process that. Feels kinda dirty to me though.
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I put up an intranet site that loops through a .csv dump of our customer database and uses a form to help look up account numbers.
I want to treat all of my keywords as wild card terms, but respect their order. For example, if I have company A: "The Monogramme Shoppe" and company B: "Monograms & More at The Shop", I want to return A and B options if I type "mono shop" in the form field. This code does that:
company_lookup = company_lookup.split(" ")
counter = company_lookup.length
company_lookup.each do |com|
if company.downcase.include? com.downcase
counter = counter - 1
end
end
if counter == 0
match_found = true
account_number = row[2].to_s
matches.push [account_number, company]
end
But if I type "mono the", I also get both results. There, I only want to get the B result.
Is there any way to use regular expressions to, say look for PartialKeyword1 and PartialKeyword2 in a string and return true if matched?
You can use the following code to construct a regular expression to match the company name, and then use this regular expression to find the matched record.
company_lookup = company_lookup.split(" ").map{|r| Regexp.quote(r)}.join('.*?')
if company =~ /#{company_lookup}/i
matches.push [row[2].to_s, company]
end
If performance is a big concern, or the data size is huge, you'd better try some full text search engine, such as Thinking Sphinx
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how would you interpret that sentence in order to start coding. do you take it as the user inputs the number into an array or does it come from a text document for example and just scan it.
I already did it for both but I only have one submission so I have to make it count
I think the requirement is very clear - you need to write a function that receives a sorted list of integers, and returns a list of their squares.
E.g., in Java:
public List<Integer> squareList (List<Integer list) {
List<Integer> retVal = new ArrayList<>(list.size());
for (int item : list) {
retVal.add(item * item);
}
Collections.sort(retVal);
return retVal;
}
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Need to add two arrays before that need to add some value at starting of the first array. Look at the following:
#conunty_format = [ "country", "imps", "revenue","network_revenue"]
final_ca = [2000,55.62,88.69]
I need to add "Canada" to final_ca and generate hash with corresponding county_format.
Hash[#conunty_format.zip(final_ca.unshift('canada'))]
=> {"country"=>"canada", "imps"=>2000, "revenue"=>55.62, "network_revenue"=>88.69}
You can use Array Zip and some properties of Array to achieve it in a single line. see the below code.
resulted_hash = #country_format.zip(final_ca.unshift("Canada")).inject({}) do |r, s| r.merge!({s[0] => s[1]}) end
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Can you please help me figure this out?
Write the code necessary to print JUST the values of each key-value
pair in lunch_order. (Use puts instead of print so each value is
printed on its own line.)
Code
lunch_order =
{ "Ryan" => "wonton soup",
"Eric" => "hamburger",
"Jimmy" => "sandwich",
"Sasha" => "salad",
"Cole" => "taco"
}
Hint:
For example, you should print out
wanton soup
hamburger
and so on.
Meaning: each y-value should be on its own line
I have tried various syntax but can't seem to figure out what I am doing wrong. Can someone please explain the right way to approach this problem? I would greatly appreciate it.
My Solution
I figured out the answer: create a y_value array and then use each method on it. For example:
y_value = ["wonton soup", "hamburger", "sandwich", "salad", "taco"]
y_value.each { |x| puts "#{x}" }
A More Idiomatic Solution
Your solution doesn't sort the values. There are certainly many ways to solve this problem, but the following is both short and idiomatic:
lunch_order.values.sort.each { |lunch| puts lunch }
This will send the following to standard output:
hamburger
salad
sandwich
taco
wonton soup