Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 10 months ago.
Improve this question
I am new to ruby and looking for a solution where I wanted to remove search a lines in a file with specific string and that string does not contains special characters.
eg:
irb(main):005:0> File.readlines("test.sh").select {|line| line =~ /Passphr|passphrs/}
=> ["passphrs=mw4test\n", "Passphrase=$passphrs\n", "Passphrase=$passphrs\n"]
I want ignore the text which is having "=$" as combination and desire output should be as:
passphrs=mw4test
Please suggest?
Perhaps just add a second condition to your select block:
File
.readlines("test.sh")
.select { |line| line =~ /Passphr|passphrs/ && !line.include?('=$') }
Related
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 1 year ago.
Improve this question
I want to write the following code with Entity Framework.
select* from LocaleStringResource as locale
cross join Language language
left join LocaleStringResourceLanguage localeLang
on locale.Id = localeLang.RecordId and
language.ID = localeLang.LanguageId
How can I do this?
I assumed some information because you don't give us enough information about the entities. I guess that you trying to do this. Try this en let us know if it's the right approach.
var query = (from locale in _context.LocaleStringResource
from language in _context.Language
join localeLangBefLJ in _context.LocaleStringResourceLanguage on new { field1 = locale.Id, field2 = language.ID } equals new { field1 = localeLangBefLJ.RecordId, field2 = localeLangBefLJ.LanguageId }
into localeLang
from x in localeLang.DefaultIfEmpty()
select new
{
locale,
language,
x
})
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 7 years ago.
Improve this question
Any tips to refactor this condition?
params = {:p1=>"foo", :p2=>true, :p3=>nil, :pN=>""}
if params[:p1].present? && params[:p2].present? && params[:pN].present?
# do something...
Something like this:
params.values_at(:p1, :p2, :pN).all?(&:present?)
if params.values_at(*%i[p1 p2 p3]).all?(&:present?)
values_at returns an Array of the values for each key you provide.
all? is true iff the predicate (present?) is true for every member of the enumerable. values_at will include nil for a missing key (rather than omit it), so you don't need to worry about the array collapsing down to only present values.
keys = [:p1, :p2, :pN]
puts "hi" if keys.all? { |k| params[k].present? }
This has the advantage of terminating the hash lookup as soon as params[k].present? is false.
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 8 years ago.
Improve this question
I am getting the following value in my params: "45,284"
How can I remove the the leading and trailing double quotes from my string?
The output that I should get is: 45,284
You can do this to your params[:userValues] to make it suitable for IN clause in your query
"45,284".split(",").map(&:to_i) #=> [45, 248]
So for params[:userValues] it will be
user_values = params[:userValues].split(",").map(&:to_i)
Now the query will look like this
#user = User.where('is_active = ? and is_support_user = ? and id IN (?)', true, false, user_values).order(:user_name)
This will work, try it out
class String
def trim
self.gsub!(/\A"|"\Z/, '')
end
end
"\"45,284\"".trim
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 8 years ago.
Improve this question
Is there a way to change resources into array?
For example:
#video = Video.all
to
[["Test", 1],["Test2", 2],["Test3", 3]]
I tried #video.to_a but it didn't work
By resources you mean an ActiveRecord collection?
If so, it can be something like
#video.map{ |video, index| [video.name, index+1] }
You can use ActiveRecord::Calculations#pluck to select one or more attributes:
Video.pluck(:name, :id)
#=> [["foo", 1], ["bar", 2], ["baz", 3]]
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 years ago.
Improve this question
I've got a pretty standard Preferences table. I'd like to list all true booleans for each record therein. How would I go about that? I know that Preference.column_names will give me all, but I need each record's particular true settings. Any idea? Something like
#preference.column_names do |c|
c if c = true
end
Thanks!
Here's the general idea of looping through an objects attributes with the attribute name and value. Are you having to filter out only boolean fields? Or are all the fields boolean?
#preference.attributes.each do |attr_name, attr_value|
"#{attr_name} is #{attr_value}" if attr_value == true
end
First you'll need to know the boolean columns, something like this should give you their names:
booleans = Model.columns.select { |c| c.type == :boolean }.map(&:name)
Then you can use send to extract the values based on a name and a simple "is it true" test takes care of the rest:
trues = booleans.select { |name| #preference.send(name) == true }