How can I implement a chain method for my class?
I'm working with a string that has to be converted to a 2 dimensional array:
rows = [['1', '2'], ['10', '20']]
I need those values as integers instead of strings. I can iterate through them and then do map, like:
rows.each {|row| row.map!(&:to_i)}
I was trying to create a to_i method that could be chainable, so I can run rows.to_i.
def to_i
each do |nested|
nested.map!(&:to_i)
end
end
This unsurprisingly fails:
NoMethodError: undefined method `to_i' for [["1", "2"], ["10", "20"]]:Array
since Array doesn't implement the method. Besides monkey patching the Array class, is there a proper or more rubier way to do it?
The other alternative is doing:
def ary_to_i array
array.each do |nested|
nested.map!(&:to_i)
end
end
but I found the method call ary_to_i(rows) confusing.
arrays ruby type-conversion
edited Nov 26 '18 at 4:41
sawa
132k29205305
asked Nov 25 '18 at 16:22
Pablo Olmos de Aguilera C.Pablo Olmos de Aguilera C.
2,71212733
add a comment |
I'm working with a string that has to be converted to a 2 dimensional array:
rows = [['1', '2'], ['10', '20']]
I need those values as integers instead of strings. I can iterate through them and then do map, like:
rows.each {|row| row.map!(&:to_i)}
I was trying to create a to_i method that could be chainable, so I can run rows.to_i.
def to_i
each do |nested|
nested.map!(&:to_i)
end
end
This unsurprisingly fails:
NoMethodError: undefined method `to_i' for [["1", "2"], ["10", "20"]]:Array
since Array doesn't implement the method. Besides monkey patching the Array class, is there a proper or more rubier way to do it?
The other alternative is doing:
def ary_to_i array
array.each do |nested|
nested.map!(&:to_i)
end
end
but I found the method call ary_to_i(rows) confusing.
arrays ruby type-conversion
edited Nov 26 '18 at 4:41
sawa
132k29205305
asked Nov 25 '18 at 16:22
Pablo Olmos de Aguilera C.Pablo Olmos de Aguilera C.
2,71212733
1
Wouldn't it be possible to do the string->int casting somewhere before, where it's easier? We don't see the whole method, so it's just a guess, but it's something I'd look for.
– Marcin Kołodziej
Nov 25 '18 at 16:35
1
I would say the Ruby way is to abandon your quest. Even if you were agreeable to adding a methodto_itoArrayit would only apply to elements of arrays that are strings, which would be ugly beyond words.
– Cary Swoveland
Nov 25 '18 at 18:27
add a comment |
I'm working with a string that has to be converted to a 2 dimensional array:
rows = [['1', '2'], ['10', '20']]
I need those values as integers instead of strings. I can iterate through them and then do map, like:
rows.each {|row| row.map!(&:to_i)}
I was trying to create a to_i method that could be chainable, so I can run rows.to_i.
def to_i
each do |nested|
nested.map!(&:to_i)
end
end
This unsurprisingly fails:
NoMethodError: undefined method `to_i' for [["1", "2"], ["10", "20"]]:Array
since Array doesn't implement the method. Besides monkey patching the Array class, is there a proper or more rubier way to do it?
The other alternative is doing:
def ary_to_i array
array.each do |nested|
nested.map!(&:to_i)
end
end
but I found the method call ary_to_i(rows) confusing.
arrays ruby type-conversion
edited Nov 26 '18 at 4:41
sawa
132k29205305
asked Nov 25 '18 at 16:22
Pablo Olmos de Aguilera C.Pablo Olmos de Aguilera C.
2,71212733
I'm working with a string that has to be converted to a 2 dimensional array:
rows = [['1', '2'], ['10', '20']]
I need those values as integers instead of strings. I can iterate through them and then do map, like:
rows.each {|row| row.map!(&:to_i)}
I was trying to create a to_i method that could be chainable, so I can run rows.to_i.
def to_i
each do |nested|
nested.map!(&:to_i)
end
end
This unsurprisingly fails:
NoMethodError: undefined method `to_i' for [["1", "2"], ["10", "20"]]:Array
since Array doesn't implement the method. Besides monkey patching the Array class, is there a proper or more rubier way to do it?
The other alternative is doing:
def ary_to_i array
array.each do |nested|
nested.map!(&:to_i)
end
end
but I found the method call ary_to_i(rows) confusing.
arrays ruby type-conversion
arrays ruby type-conversion
edited Nov 26 '18 at 4:41
sawa
132k29205305
asked Nov 25 '18 at 16:22
Pablo Olmos de Aguilera C.Pablo Olmos de Aguilera C.
2,71212733
edited Nov 26 '18 at 4:41
sawa
132k29205305
asked Nov 25 '18 at 16:22
Pablo Olmos de Aguilera C.Pablo Olmos de Aguilera C.
2,71212733
edited Nov 26 '18 at 4:41
sawa
132k29205305
edited Nov 26 '18 at 4:41
sawa
132k29205305
edited Nov 26 '18 at 4:41
sawa
132k29205305
132k29205305
asked Nov 25 '18 at 16:22
Pablo Olmos de Aguilera C.Pablo Olmos de Aguilera C.
2,71212733
asked Nov 25 '18 at 16:22
Pablo Olmos de Aguilera C.Pablo Olmos de Aguilera C.
2,71212733
asked Nov 25 '18 at 16:22
Pablo Olmos de Aguilera C.Pablo Olmos de Aguilera C.
2,71212733
2,71212733
1
Wouldn't it be possible to do the string->int casting somewhere before, where it's easier? We don't see the whole method, so it's just a guess, but it's something I'd look for.
– Marcin Kołodziej
Nov 25 '18 at 16:35
1
I would say the Ruby way is to abandon your quest. Even if you were agreeable to adding a methodto_itoArrayit would only apply to elements of arrays that are strings, which would be ugly beyond words.
– Cary Swoveland
Nov 25 '18 at 18:27
add a comment |
1
Wouldn't it be possible to do the string->int casting somewhere before, where it's easier? We don't see the whole method, so it's just a guess, but it's something I'd look for.
– Marcin Kołodziej
Nov 25 '18 at 16:35
1
I would say the Ruby way is to abandon your quest. Even if you were agreeable to adding a methodto_itoArrayit would only apply to elements of arrays that are strings, which would be ugly beyond words.
– Cary Swoveland
Nov 25 '18 at 18:27
1
1
Wouldn't it be possible to do the string->int casting somewhere before, where it's easier? We don't see the whole method, so it's just a guess, but it's something I'd look for.
– Marcin Kołodziej
Nov 25 '18 at 16:35
Wouldn't it be possible to do the string->int casting somewhere before, where it's easier? We don't see the whole method, so it's just a guess, but it's something I'd look for.
– Marcin Kołodziej
Nov 25 '18 at 16:35
1
1
I would say the Ruby way is to abandon your quest. Even if you were agreeable to adding a method
to_i to Array it would only apply to elements of arrays that are strings, which would be ugly beyond words.– Cary Swoveland
Nov 25 '18 at 18:27
I would say the Ruby way is to abandon your quest. Even if you were agreeable to adding a method
to_i to Array it would only apply to elements of arrays that are strings, which would be ugly beyond words.– Cary Swoveland
Nov 25 '18 at 18:27
add a comment |
2 Answers
2
active
oldest
votes
You could define a to_i method just for rows:
rows = [['1','2'], ['10','20']]
def rows.to_i
each do |nested|
nested.map!(&:to_i)
end
end
p rows.to_i # => [[1, 2], [10, 20]]
answered Nov 25 '18 at 16:50
steenslagsteenslag
63k11102142
add a comment |
Although it’s an anti-pattern, you might monkey-patch the Array class:
class Array
def to_i
map do |nested|
nested.map(&:to_i)
end
end
def to_i!
each do |nested|
nested.map!(&:to_i)
end
end
end
But I’d better go with the latter alternative in OP.
Sidenote: mutating arrays is not a best idea ever, but if you do, choose the name ending with a bang as in my example.
answered Nov 25 '18 at 16:27
Aleksei MatiushkinAleksei Matiushkin
83.6k95694
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You could define a to_i method just for rows:
rows = [['1','2'], ['10','20']]
def rows.to_i
each do |nested|
nested.map!(&:to_i)
end
end
p rows.to_i # => [[1, 2], [10, 20]]
answered Nov 25 '18 at 16:50
steenslagsteenslag
63k11102142
add a comment |
You could define a to_i method just for rows:
rows = [['1','2'], ['10','20']]
def rows.to_i
each do |nested|
nested.map!(&:to_i)
end
end
p rows.to_i # => [[1, 2], [10, 20]]
answered Nov 25 '18 at 16:50
steenslagsteenslag
63k11102142
add a comment |
You could define a to_i method just for rows:
rows = [['1','2'], ['10','20']]
def rows.to_i
each do |nested|
nested.map!(&:to_i)
end
end
p rows.to_i # => [[1, 2], [10, 20]]
answered Nov 25 '18 at 16:50
steenslagsteenslag
63k11102142
You could define a to_i method just for rows:
rows = [['1','2'], ['10','20']]
def rows.to_i
each do |nested|
nested.map!(&:to_i)
end
end
p rows.to_i # => [[1, 2], [10, 20]]
answered Nov 25 '18 at 16:50
steenslagsteenslag
63k11102142
answered Nov 25 '18 at 16:50
steenslagsteenslag
63k11102142
answered Nov 25 '18 at 16:50
steenslagsteenslag
63k11102142
answered Nov 25 '18 at 16:50
steenslagsteenslag
63k11102142
63k11102142
add a comment |
add a comment |
Although it’s an anti-pattern, you might monkey-patch the Array class:
class Array
def to_i
map do |nested|
nested.map(&:to_i)
end
end
def to_i!
each do |nested|
nested.map!(&:to_i)
end
end
end
But I’d better go with the latter alternative in OP.
Sidenote: mutating arrays is not a best idea ever, but if you do, choose the name ending with a bang as in my example.
answered Nov 25 '18 at 16:27
Aleksei MatiushkinAleksei Matiushkin
83.6k95694
add a comment |
Although it’s an anti-pattern, you might monkey-patch the Array class:
class Array
def to_i
map do |nested|
nested.map(&:to_i)
end
end
def to_i!
each do |nested|
nested.map!(&:to_i)
end
end
end
But I’d better go with the latter alternative in OP.
Sidenote: mutating arrays is not a best idea ever, but if you do, choose the name ending with a bang as in my example.
answered Nov 25 '18 at 16:27
Aleksei MatiushkinAleksei Matiushkin
83.6k95694
add a comment |
Although it’s an anti-pattern, you might monkey-patch the Array class:
class Array
def to_i
map do |nested|
nested.map(&:to_i)
end
end
def to_i!
each do |nested|
nested.map!(&:to_i)
end
end
end
But I’d better go with the latter alternative in OP.
Sidenote: mutating arrays is not a best idea ever, but if you do, choose the name ending with a bang as in my example.
answered Nov 25 '18 at 16:27
Aleksei MatiushkinAleksei Matiushkin
83.6k95694
Although it’s an anti-pattern, you might monkey-patch the Array class:
class Array
def to_i
map do |nested|
nested.map(&:to_i)
end
end
def to_i!
each do |nested|
nested.map!(&:to_i)
end
end
end
But I’d better go with the latter alternative in OP.
Sidenote: mutating arrays is not a best idea ever, but if you do, choose the name ending with a bang as in my example.
answered Nov 25 '18 at 16:27
Aleksei MatiushkinAleksei Matiushkin
83.6k95694
answered Nov 25 '18 at 16:27
Aleksei MatiushkinAleksei Matiushkin
83.6k95694
answered Nov 25 '18 at 16:27
Aleksei MatiushkinAleksei Matiushkin
83.6k95694
answered Nov 25 '18 at 16:27
Aleksei MatiushkinAleksei Matiushkin
83.6k95694
83.6k95694
add a comment |
add a comment |
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1
Wouldn't it be possible to do the string->int casting somewhere before, where it's easier? We don't see the whole method, so it's just a guess, but it's something I'd look for.
– Marcin Kołodziej
Nov 25 '18 at 16:35
1
I would say the Ruby way is to abandon your quest. Even if you were agreeable to adding a method
to_itoArrayit would only apply to elements of arrays that are strings, which would be ugly beyond words.– Cary Swoveland
Nov 25 '18 at 18:27