CODEWITHSUNDEEP
rubyregexstring
junky
junky

Reputation: 1478

ruby, how can I remove a space at the end with gsub?

This removes all spaces:

irb(main):021:0> 'gff gf ggfgfg '.gsub(' ','')
=> "gffgfggfgfg"

but I want just to remove the space at the end,

something like 

irb(main):023:0>  'gff gf ggfgfg '.gsub([*' '$],'')

but I get:

SyntaxError: compile error
(irb):25: syntax error, unexpected $undefined, expecting ']'
'gff gf ggfgfg '.gsub([*' '$],'')
                            ^
    from (irb):25
    from :0
                           ^
    (irb):23: syntax error, unexpected ',', expecting $end
    'gff gf ggfgfg '.gsub(^' ','')
                               ^
        from (irb):23
        from :0

n.b. I can't use truncate, trim and other rails helpers.

Upvotes: 1

Views: 7624

Answers (2)

Mark Reed
Mark Reed

Reputation: 95252

There's also String#rstrip, which isn't a Rails thing:

'  foo bar   '.rstrip # => "  foo bar"

There's a self-modifying version rstrip!, as well as lstrip(!) for leading space and strip(!) for both.

Upvotes: 6

maerics
maerics

Reputation: 156424

Use a regular expression which matches only whitespace at the end of the string:

'foo bar '.gsub(/\s+$/,'') # => "foo bar"

There is also rstrip and rstrip!:

'foo bar '.rstrip # => "foo bar"

Upvotes: 16

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