Character replacement
Basic types / Strings
Empty strings
Character count
Substring search
Substring index
Substring replacement
Getting a substring
Substring insertion
Substring removal
String comparison
String interpolation
Converting to a number
Iterating over a string
Changing letter case
Removing spaces
Splitting into an array
Character replacement
Replacing multiple characters
String concatenation
Concatenating a list of strings
Repeating a string
Escaping characters
str_v =
"1-3-2"
str_v[
2
] =
"2"
str_v[
4
] =
"3"
# str is "1-2-3"
puts
"str_v is \"
#{str_v}
\""
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