Tagged Questions
1
vote
7answers
71 views
Removing all elements of a column in a two-dimensional array
I have this array:
arr = [["a","b","c"],[2,3,5],[3,6,8],[1,3,1]]
which is representing a prawn-table containing columns "a", "b", and "c".
How do I remove the entire column "c" with all its ...
-1
votes
1answer
90 views
Flatten a nested hash in Ruby on Rails
I have a hash in the structure below
{
"Result": [
{
"Links": [
{
"UrlTo": "http://www.example.com/",
"Visited": ...
3
votes
4answers
70 views
Slice array when element reached
Lets say I have an array like so:
['x','cat', 'dog', 'x', 'dolphin', 'cougar', 'whale']
I don't know the length of the array or when an 'x' will occur. When I reach 'x' I want to push the following ...
2
votes
5answers
84 views
How do I add a cumulative sum to an array for only one value?
I have an array of arrays with x and y values:
[[some_date1, 1], [some_date2, 3], [some_date3, 5], [some_date4, 7]]
The result should only sum the y values (1, 3, 5, 7) so that the result is like ...
0
votes
1answer
74 views
Array of Arrays sum in ruby
arry = [["a",3.0,3], ["b",4.0,4], ["c",5.0,5]]
I am looking for the following output
[["a", 3.0, [["b", 4.0, 7], ["c", 5.0, 8]]],
["b", 4.0, [["a", 3.0, 7], ["c", 5.0, 9]]],
["c", 5.0, [["a", ...
1
vote
1answer
50 views
Sorting multidimensional array, descending
I have an multidimensional array in my ruby which looks like this :
arr= [{"10.0.1.50", "4"},
{"10.0.1.51", "10"},
{"10.0.1.48", "7"}]
I want to sort it such that the result should be:
...
-2
votes
2answers
65 views
Ruby: create a double array from string based on a colon separator
I get a string with the following repeating pattern: label (one word), colon, some text (pretty much anything, even empty). For example:
"FileSize: 597262388 Duration_String: 1h 34mn ...
0
votes
3answers
93 views
Multi-Dimensional Array in Ruby on Rails?
I'm wondering if its possible to do multidimensional arrays in rails?
I'd like to get something like to formulate some data:
apple => 'tasty', 'red', 'round'
cereal => 'milk', 'breakfast'
name ...
0
votes
2answers
43 views
ruby array of arrays saving data across all insances of array, euler 18
for the following code
#!/usr/bin/ruby -w
nums = File::read("euler18nums.txt"); #opens file with number array inside.
parts = nums.split(' '); #save it into instance of an array.
t ...
2
votes
5answers
104 views
How to get specific value within an array of arrays
I have an array (outside array) that contains three arrays (inside arrays), each of which have three elements.
array = [[a, b, c], [d, e, f], [g, h, i]]
I want to select the specific inside array ...
2
votes
2answers
59 views
Ruby unpack array to block
settings = [ ['127.0.0.1', 80], ['0.0.0.0', 443] ]
How can I do:
settings.each do |ip, port|
...
end
Instead of:
settings.each do |config|
ip, port = *config
...
end
2
votes
1answer
50 views
.each seemingly recursing into second dimension of 2D array
I have just stumbled upon this way of iterating over 2-dimensional arrays in Ruby:
[[1, 2], [3, 4]].each {|x| puts x}
The output is:
1
2
3
4
My question is simple: why and how is this happening? ...
1
vote
4answers
119 views
How to make Ruby hash of arrays from array
I'm a Perl developer trying to learn Ruby...
So, I'll demonstrate in Perl what I'm trying to accomplish in Ruby and then summarize at the end...
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
# ...
0
votes
2answers
31 views
How to access assoc array within assoc array
I have the following code:
def operation hash
puts hash[:three][:three][:three]
end
operation :one => 'item', :two => [1,2,3], :three => [
:one => 1,
:two => 2,
:three ...
-2
votes
1answer
85 views
Ruby Variable Index in 2D Array [closed]
I have a two dimensional array right now that I'm attempting access and save into an object. For some reason I keep getting this error: "undefined method '[]' for nil:NilClass (NoMethodError)" ...
