another ruby and arrays thing

[tester]

I just realized, that I don't have one solution under my hand, and I'm using wrong one.

Let say that I have 2 arrays:

array1 (strngs):

string1
string2
string3
string4

array2 (boolean ints):

0
1
0
1

On output I'd like to have only rows that correspond to 1's.
For above example, output array it would be:

string2
string4

How to make it in ruby?

[TheOm]

I assume this is related to your other thread?
Do you only want the strings that don't match in your new array?

input:
[ "f1a->f1a/a2",
"f1a->f5b/a3",
"f3c->f3c/d2",
"f3b->f5a/a3" ]

result:
["f1a->f5b/a3",
"f3b->f5a/a3" ]

Then use select instead of map, like this:

Code: Select all

    n1=0 #position of first occurence
    n2=5 #position of second occurence
    len=3 #length of the string to find and compare
    output_array = string_array.select do |str|
        !(str =~ /^.{#{n1}}(.{#{len}}).{#{n2-n1-len}}\1/)
    end

[TheOm]

If that's not what you want, you could do something like this:

Code: Select all

array1.each_index do |i|
    array1.delete_at(i) if array2[i] == 0
end

[tester]

Second solution will be more appropriate; it applies to different sections. There are various filters (formula & range based, content or comparison based) which define whether to pass values/rows/strings (1) or not (0), and such module outputs appropriate entries according to 1's indexes.

Thanks.

[tester]

Small problem here.

How to adjust it to have multiple arrays pass through that way?

(and how to fix it?)

[TheOm]

I would do it like this

[tester]

Thanks!