For loops trouble

[Daniel Johnson]

I am trying to translate a program I have in Java into ruby and having
trouble translating this for loop
for(int i = 0; a < x;i++)
I tried this
for i in a...x
but it produce some errors. Any help will be appreciated. Thank you.

 

[Josh Cheek]

[Note: parts of this message were removed to make it a legal post.]

I am trying to translate a program I have in Java into ruby and having
trouble translating this for loop
for(int i = 0; a < x;i++)
I tried this
for i in a...x
but it produce some errors. Any help will be appreciated. Thank you.

numbers = *1..10
max = 6

numbers.each do |num|
break unless num < max
puts num
end

 

[Josh Cheek]

[Note: parts of this message were removed to make it a legal post.]

I am trying to translate a program I have in Java into ruby and having
trouble translating this for loop
for(int i = 0; a < x;i++)
I tried this
for i in a...x
but it produce some errors. Any help will be appreciated. Thank you.

numbers = *1..10
max = 6

numbers.each do |num|
break unless num < max
puts num
end

I guess, depending on your needs, you might want the index as well, in which
case

numbers.each do |num|

becomes

numbers.each_with_index do |num, index|

 

[7stud --]

Daniel Johnson wrote in post #993238:

I am trying to translate a program I have in Java into ruby and having
trouble translating this for loop
for(int i = 0; a < x;i++)
I tried this
for i in a...x
but it produce some errors. Any help will be appreciated. Thank you.

Ruby has a for-in loop:

a = [2, 4, 1, 9, 6]
x = 7

for num in a
break if num > x
puts num
end

But a for-in loop calls each(), so ruby programmers just use each()
directly:

a.each do |num|
break if num > x
puts num
end

 

[Christopher Dicely]

I am trying to translate a program I have in Java into ruby and having
trouble translating this for loop
=C2=A0 for(int i =3D 0; a < x;i++)
I tried this
=C2=A0 for i in a...x
but it produce some errors. Any help will be appreciated. Thank you.

A simple literal translation goes from this:

for (int i=3D0; a < x; i++) { ... }

to this Ruby:

i =3D 0
while a < x
...
i +=3D 1
end

That Ruby is almost certainly not the best way to translate the Java
loop, but the best way really depends on what you are doing in the
loop.

 

[botp]

=A0 for(int i =3D 0; a < x;i++)

there are many ways.
eg,

x =3D> 6
a

=3D> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

a.take_while{|e| e<x} =3D> [1, 2, 3, 4, 5]
a.each_with_index.take_while{|e| e<x}

=3D> [[1, 0], [2, 1], [3, 2], [4, 3], [5, 4]]

kind regards -botp