For issues relating to developing in Ruby, version 1.8.7.
Use this specific tag along with the generic one: ruby.
Questions tagged [ruby-1.8.7]
202 questions
-1
votes
2 answers
How to get an average from matrix[array]
(Before start, I am using Ruby 1.8.7, so I won't be able to use fancy stuff.)
As title says, I want to calculate the average of column or row.
But, I can't even find the way to traverse/iterate Matrix form of array from online.
Let's say you have…
GothLoli
- 19
- 1
- 5
-1
votes
3 answers
regex to match everything except protocol from url
I have the following regex pattern:
(?:http.?:\/\/)
This matches the protocol component from a web url, I want a regex to do the opposit, to match everything except the protocol, so far my every attempt has not worked at all.
Becuase ultimatly what…
Thermatix
- 2,224
- 13
- 36
-1
votes
3 answers
Inject in array
I am trying to do some calculation like the following. option is an empty hash and aes is an array.
options = {}
aes = [1,2]
test = aes.inject([]) do |array, value|
array << value + 2
array << value -1 if options[:calculation] # here…
Arvind Kumar
- 217
- 2
- 11
-1
votes
1 answer
Greedy conditional algorithm
I have a list of k artistes mapped to their respective music videos that they have starred in. This is represented in a multidimensional array:
musicvid_arr =
[["MUSICVID 1", 2014, ["ARTISTE 1", "ARTISTE 2", "ARTISTE 3"]],
["MUSICVID 2", 2014,…
JQuack
- 21
- 4
-1
votes
1 answer
Array of IDs to array of function results
I currently have this code
def objects(ids)
array = []
ids.each do |id|
array << object(id) # => #
end
array
end
objects([1, 2, 3])
# => [#, #, #]
It seems like there should be a cleaner way to…
Dan Grahn
- 8,166
- 3
- 33
- 67
-1
votes
2 answers
Ruby: Permutation on an Array
Say, I have an array:
a = [1,2]
and
n = 3
I want output like this:
[[1, 1, 1], [1, 1, 2], [1, 2, 1], [1, 2, 2], [2, 1, 1], [2, 1, 2], [2, 2, 1], [2, 2, 2]]
This are all possible combinations of length n of elements from array a.
Most importantly…
rony36
- 3,073
- 1
- 27
- 40
-5
votes
2 answers
adding a new table using rails migration..?
I want to add new table using rails migration:
**table_name** users_location_track
**columns** id (primary key, auto increment serial),
user_id (reference to users), location_info (string),
creation_time(time-stamp)
please…
piyushmandovra
- 3,673
- 2
- 17
- 29