[{:a=>10},

{:a=>10}, {:a=>10}]

[3,

{:a=>10}]

will

be raises an error

[{:a=>30}]

"10".to_int

"10".to_i

to_i

"10"

to_int

"10"

10.to_s

to_string

10

to_s

10

10.to_string

will

be raises an error

2.0000000001

2.0

2

2

will

be raises an error

2.4999999999

2.5

"the

"

"the

best Language"

will

be raises an error

"the

best"

will

be raises an error

"Ruby

Language"

"Ruby"

result

will be unknown

get

the last element from the "Ruby Language" string

will

be raises an error

result

will be unknown

get

the first element from the "Ruby Language" string

get

the 1st through 4rd elements from the "Ruby Language" string

get

the 1st through 3rd elements from the "Ruby Language" string

will

be raises an error

delete

the 1st through 3rd elements from the "Ruby Language" string

result

will be unknown

2.6

will

be raises an error

"Ruby

2.6"