How to remove characters from String at specific index in Ruby

ruby, string

Solution

I think you want this:

>> string = 'Set{[8, 4, "a", 6, 1]}'
=> "Set{[8, 4, \"a\", 6, 1]}"
>> string.gsub('{[', '{').gsub(']}', '}')
=> "Set{8, 4, \"a\", 6, 1}"

If there is any danger that you might see the '{[' or ']}' pattern in the middle of the string and want to preserve it there, and if you are sure of the position relative to the start and end of the string each time, you could do this:

>> string = 'Set{[8, 4, "a", 6, 1]}'
>> chars = string.chars
>> chars.delete_at(4)
>> chars.delete_at(-2)
>> chars.join
=> "Set{8, 4, \"a\", 6, 1}"

Problem

I have some strings like this: - `'Set{[5, 6, 9]}'` - `'Set{[8, 4, "a", "[", 1]}'` - `'Set{[4, 8, "]", "%"]}'` I want to remove the square brackets at indices 4 and -2 from these strings so that I have: - `'Set{5, 6, 9}'` - `'Set{8, 4, "a", "[", 1}'` - `'Set{4, 8, "]", "%"}'` How can I do that?

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