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Ruby: How do I find a letter in a string if only it is at the beginning of said string?


Ruby: How do I find a letter in a string if only it is at the beginning of said string?

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Ruby: How do I find a letter in a string if only it is at the beginning of said string?
Tag : ruby , By : walkah
Date : December 01 2020, 05:00 PM

may help you . You can use the string.start_with?(arg) method. http://apidock.com/ruby/String/start_with%3F
puts "What word starts with the letter 'A'?"  
ans = gets.chomp                    # => 'apple'
"Correct!" if ans.start_with?('a')  # => true

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Find a string and extract letter upfront to found string till another specifed string


Tag : regex , By : sadboy
Date : March 29 2020, 07:55 AM
I hope this helps . Since this is a simple substitution on a single line, its a job sed was created to do:
$ sed -r 's/.*,[[:space:]]*([^,[:space:]]+)[[:space:]]*Task.*/\1/' file
192

How can I find the first non-recurring letter of a string in Ruby?


Tag : ruby , By : CrookedNumber
Date : March 29 2020, 07:55 AM
this will help I have a string "teststring". I want to find first non-recurring character in Ruby. , You could write:
str = 'teststring'

arr = str.chars
(arr - (arr.difference(arr.uniq))).first
  #= "e"
a = [1,2,3,4,3,2,2,4]
b = [2,3,4,4,4]

a     -      b #=> [1]
a.difference b #=> [1, 3, 2, 2]
arr - arr.difference(arr.uniq)

find letter within string and get positions - ruby


Tag : arrays , By : Jonathan
Date : March 29 2020, 07:55 AM
like below fixes the issue The error comes from the fact you haven't closed the range block with an end. But there are other points. I suggest you to try something like this:
def nearby_az(str)
  list = Array.new
  pos = -1
  str.each_char do |c|
    pos = pos + 1
    if (c == 'a') then
      list.push(pos+1)
      list.push(pos+2)
      list.push(pos+3)
    end
  end
  list
end
def nearby_az(str)
  list = Array.new
  nstr = str.each_char.to_a
  nstr.each_index do |i|
    if (nstr[i] == 'a') then
      list.push(i+1)
      list.push(i+2)
      list.push(i+3)
    end
  end
  list
end
puts nearby_az("asdfgaqwer")
def nearby_az(string)
  list = []
  for i in 0..(string.length)
    if string[i] == 'a'
      list.push(i+1)
      list.push(i+2)
      list.push(i+3)
    end
  end
  list
end

Find and remove from the string words beginning with the letter A


Tag : php , By : m0gb0y74
Date : March 29 2020, 07:55 AM
this will help Suppose I have a string and want to remove all the words that begin with the letter a or A.: , Please use like
$string = 'Aorem ipsum adolor sit amet, consectetur dipiscing aelit.';
echo "<br>".preg_replace('/(\ba\w+\b|\bA\w+\b)/', '', $string);
ipsum sit , consectetur dipiscing .

find letter at the beginning of the string followed by space


Tag : chash , By : AdrianB
Date : March 29 2020, 07:55 AM
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