Correct way to populate an Array with a Range in Ruby

Question

I am working through a book which gives examples of Ranges being converted to equivalent arrays using their  to a  methods  When i run the code in irb I get the following warning   warning  default  to a  will be obsolete   What is the the correct alternative to using to a   are there alternate ways to populate an array with a Range

User · Answer

Sounds like you re doing this   0  10 to a   The warning is from Fixnum to a  not from Range to a  Try this instead    0  10  to a

User · Answer

This works for me in irb   irb gt   1  4  to a   gt   1  2  3  4    I notice that   irb gt  1  4 to a  irb  1  warning  default  to a  will be obsolete ArgumentError  bad value for range         from  irb  1   So perhaps you are missing the parentheses     I am running Ruby 1 8 6 patchlevel 114

User · Answer

Sounds like you re doing this   0  10 to a   The warning is from Fixnum to a  not from Range to a  Try this instead    0  10  to a

User · Answer

Sounds like you re doing this   0  10 to a   The warning is from Fixnum to a  not from Range to a  Try this instead    0  10  to a

User · Answer

This is another way   irb gt    1  10     gt   1  2  3  4  5  6  7  8  9  10

User · Answer

This works for me in irb   irb gt   1  4  to a   gt   1  2  3  4    I notice that   irb gt  1  4 to a  irb  1  warning  default  to a  will be obsolete ArgumentError  bad value for range         from  irb  1   So perhaps you are missing the parentheses     I am running Ruby 1 8 6 patchlevel 114

User · Answer

Sounds like you re doing this   0  10 to a   The warning is from Fixnum to a  not from Range to a  Try this instead    0  10  to a

User · Answer

I just tried to use ranges from bigger to smaller amount and got the result I didn t expect   irb main  007 0 gt  Array 1  5    gt   1  2  3  4  5  irb main  008 0 gt  Array 5  1    gt       That s because of ranges implementations  So I had to use the following option    1  5  to a reverse

User · Answer

You can create an array with a range using splat    gt  gt  a   1  10    gt   1  2  3  4  5  6  7  8  9  10    using Kernel Array method   Array  1  10    gt   1  2  3  4  5  6  7  8  9  10    or using to a   1  10  to a   gt   1  2  3  4  5  6  7  8  9  10

User · Answer

This works for me in irb   irb gt   1  4  to a   gt   1  2  3  4    I notice that   irb gt  1  4 to a  irb  1  warning  default  to a  will be obsolete ArgumentError  bad value for range         from  irb  1   So perhaps you are missing the parentheses     I am running Ruby 1 8 6 patchlevel 114

User · Answer

This is another way   irb gt    1  10     gt   1  2  3  4  5  6  7  8  9  10

User · Answer

Check this   a      1  10    top   10 downto  1

User · Answer

You can create an array with a range using splat    gt  gt  a   1  10    gt   1  2  3  4  5  6  7  8  9  10    using Kernel Array method   Array  1  10    gt   1  2  3  4  5  6  7  8  9  10    or using to a   1  10  to a   gt   1  2  3  4  5  6  7  8  9  10

User · Answer

Check this   a      1  10    top   10 downto  1

User · Answer

I just tried to use ranges from bigger to smaller amount and got the result I didn t expect   irb main  007 0 gt  Array 1  5    gt   1  2  3  4  5  irb main  008 0 gt  Array 5  1    gt       That s because of ranges implementations  So I had to use the following option    1  5  to a reverse

User · Answer

This works for me in irb   irb gt   1  4  to a   gt   1  2  3  4    I notice that   irb gt  1  4 to a  irb  1  warning  default  to a  will be obsolete ArgumentError  bad value for range         from  irb  1   So perhaps you are missing the parentheses     I am running Ruby 1 8 6 patchlevel 114

[ruby] Correct way to populate an Array with a Range in Ruby

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