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Ruby: Insert Multiple Values Into String


Ruby: Insert Multiple Values Into String

By : Dorin M
Date : November 21 2020, 04:03 PM
it fixes the issue Suppose we have the string "aaabbbccc" and want to use the String#insert to convert the string to "aaabbbccc". Is this the best way to insert multiple values into a Ruby string using String#insert or can multiple values simultaneously be added: , Let's have some fun. How about
code :
class String
  def splice h
    self.each_char.with_index.inject('') do |accum,(c,i)|
      accum + h.fetch(i,'') + c
    end  
  end  
end  

"aaabbbccc".splice(3=>"<strong>", 6=>"</strong>")
=> "aaa<strong>bbb</strong>ccc"


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Parsing a String in Ruby for multiple values?

Parsing a String in Ruby for multiple values?


By : user1655876
Date : March 29 2020, 07:55 AM
Does that help Depends, if they all look like that, then:
/Phone \+ (\w+) mins & (\w+) texts - (\d+) month plan \$(\w+)/
code :
str =  "Phone + 300 mins & unlimited texts - 24 month plan $25"
regex =  /Phone \+ (\w+) mins & (\w+) texts - (\d+) month plan \$(\w+)/
match = regex.match(str).to_a
string.insert multiple values. Is this possible?

string.insert multiple values. Is this possible?


By : Aruna
Date : March 29 2020, 07:55 AM
wish helps you Whether or not you can make this a one-liner (you can), it will always cause multiple strings to be created, due to the immutability of the String in .NET
If you want to do this somewhat efficiently, without creating multiple strings, you could use a StringBuilder. An extension method could also be useful to make it easier to use.
code :
public static class StringExtensions
{
    public static string MultiInsert(this string str, string insertChar, params int[] positions)
    {
        StringBuilder sb = new StringBuilder(str.Length + (positions.Length*insertChar.Length));
        var posLookup = new HashSet<int>(positions);
        for(int i=0;i<str.Length;i++)
        {
            sb.Append(str[i]);
            if(posLookup.Contains(i))
                sb.Append(insertChar);

        }
        return sb.ToString();

    }
}
Right way to extract multiple values from string using regex in ruby 1.8

Right way to extract multiple values from string using regex in ruby 1.8


By : Alio
Date : March 29 2020, 07:55 AM
wish helps you Rubys String#match method returns a MatchData object with the method captures to return an Array of captures.
code :
>> string = "FOO: 1 BAR: 2"
=> "FOO: 1 BAR: 2"
>> string.match /FOO: (\d+) BAR: (\d+)/
=> #<MatchData "FOO: 1 BAR: 2" 1:"1" 2:"2">
>> _.captures
=> ["1", "2"]
>> foo, bar = _
=> ["1", "2"]
>> foo
=> "1"
>> bar
=> "2"
foo, bar = input.match(/FOO: (\d+) BAR: (\d+)/).captures
Ruby: Check if a string contains multiple values

Ruby: Check if a string contains multiple values


By : santhu sakinala
Date : March 29 2020, 07:55 AM
around this issue I want to see if any arbitrary characters c1,c2,c3... turn up in a given string. , Write as below :
code :
val = "abc123"
val[/[1af]/] # => "a"
val[/[w6f]/] # => nil
if val[/[a23]/]
  #...
end
select with multiple values in an insert statement using PG gem with Ruby

select with multiple values in an insert statement using PG gem with Ruby


By : David H.
Date : March 29 2020, 07:55 AM
This might help you Can you guys help me out with this. If I use this db query directly in the postgresql database it works fine, however when using the PG gem in Ruby it expects me to have 6 values in the array, however I want to get those values from a SELECT statement.
code :
res = conn.exec("SELECT client_type, distance_in_ft, hostname, serial_number, -65, 224 FROM test_clients WHERE eth_ipv4 = 192.168.0.1").first

conn.prepare('statement2', 'INSERT INTO client_results (client_type, distance, hostname, serial_number, rssi, txrate) VALUES ($1, $2, $3, $4, $5, $6)')
conn.exec_prepared('statement2', res.values)
conn.exec("INSERT INTO client_results (client_type, distance, hostname, serial_number, rssi, txrate) SELECT client_type, distance_in_ft, hostname, serial_number, -65, 224 FROM test_clients WHERE eth_ipv4 = '192.168.0.1'")
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