Sha256: 9192c9c35dda3eca8b21ac1e6d69d165e33703fe78f7e59de600bae4f8c1c3cb
Contents?: true
Size: 861 Bytes
Versions: 13
Compression:
Stored size: 861 Bytes
Contents
class String
# Expands tabs to +n+ spaces. Non-destructive. If +n+ is 0,
# then tabs are simply removed. Raises an exception if +n+
# is negative.
#
# "\t\tHey".expand_tabs(2) #=> " Hey"
#
# Thanks to GGaramuno for a more efficient algorithm. Very nice.
#
# CREDIT: Gavin Sinclair, Noah Gibbs, GGaramuno
#
# TODO: Don't much care for the name String#expand_tabs.
# What about a more concise name like #detab?
def expand_tabs(n=8)
n = n.to_int
raise ArgumentError, "n must be >= 0" if n < 0
return gsub(/\t/, "") if n == 0
return gsub(/\t/, " ") if n == 1
str = self.dup
while
str.gsub!(/^([^\t\n]*)(\t+)/) { |f|
val = ( n * $2.size - ($1.size % n) )
$1 << (' ' * val)
}
end
str
end
# Singular form of #expand_tabs.
alias_method :expand_tab, :expand_tabs
end
Version data entries
13 entries across 12 versions & 2 rubygems